297 articles

18 avril

Newest 'ffmpeg' Questions - Stack Overflow http://stackoverflow.com/questions/tagged/ffmpeg

14:23
Why is FFProbe (using fluent-ffmpeg) returning incomplete and inaccurate metadata? - volume one Newest 'ffmpeg' Questions - Stack Overflow

I am returning metadata about a file using ffprobe. The file can be found here. I am using fluent-ffmpeg in Node.js which shouldn't make any difference. Its just nicer to use than a command-line. The code goes like this: ffmpeg.ffprobe('https://devxxx001.s3.amazonaws.com/vertical-hd_720_1280_30fps.mp4'), function (err, metadata) console.log(JSON.stringify(metadata)); ); The metadata output I receive is this: "streams": [ "index": 0, "codec_name": "h264", "codec_long_name": "H.264 / AVC / MPEG-4 AVC / MPEG-4 (...) -- found here
12:55
Replacing avcodec_decode_video/avcodec_decode_video2 with currently supported functions - Silverstock Newest 'ffmpeg' Questions - Stack Overflow

I am trying to build a C++ program, and the creator is using depreciated functions, I have been replacing them fairly easily, but I am not totally sure how to replace these. This is a sample from the decode file: #if defined HAVE_AVCODEC_SEND_PACKET && defined HAVE_AVCODEC_RECEIVE_FRAME AVPacket* pkt = av_packet_alloc(); if (!pkt) return 0; pkt->data=data; pkt->size=datalen; int ret = avcodec_send_packet(codecContext, pkt); while (ret == 0) ret = avcodec_receive_frame(codecContext,frameIn); if (ret != 0) (...)
10:02
How to use the latest version of ⓐffmpeg/ffmpeg in a React.js project? - Muzammil Raza Newest 'ffmpeg' Questions - Stack Overflow

I'm working on a React.js project where I need to process videos in the browser using ⓐffmpeg/ffmpeg. I noticed that the package has been updated recently, and the API and functions have changed. In the older version, I used to import the package and functions like this: import createFFmpeg, fetchFile from 'ⓐffmpeg/ffmpeg'; However, in the latest version, I see that the import has changed to: import FFmpeg from 'ⓐffmpeg/ffmpeg'; and all new functions are changed I have checked in by log: I have check by console ffmpeg, it (...)
08:44
Possible to copy PCR/PTS/DTS data between TS files? - muraliv Newest 'ffmpeg' Questions - Stack Overflow

I've 2 h264/aac stream TS files (say a.ts and b.ts) that have same duration and packet numbers. However PCR/PTS/DTS data of their audio/video stream packets are different. How do I copy PCR/PTS/DTS data from a.ts to b.ts using ffmpeg or other tools without actually overwriting the audio and video frames data? Ideally want to do this without re-encoding.
07:49
FFmpeg - record from stream terminating unexpectedly using kokorin/Jaffree ffmpeg wrapper for Java - pyrmon Newest 'ffmpeg' Questions - Stack Overflow

I am programming a Spring Boot Application using Maven and Java 21. I am trying to record a stream from a url and save it to a mkv file. I intend to do this with kokorin/Jaffree in version 2023.09.10. The recording seems to work ok, however longer videos are terminating unexpectedly. Sometimes after 5 minutes, other times an hour or even longer. Sometimes with Exit Code 0 and sometimes with 1. I have implemented the recording like this: ⓐOverride public void startRecording(RecordingSchedule recordingSchedule) logger.info("Starting recording for schedule with filename (...)

17 avril

Newest 'ffmpeg' Questions - Stack Overflow http://stackoverflow.com/questions/tagged/ffmpeg

22:58
JPG Right Colors - user1897354 Newest 'ffmpeg' Questions - Stack Overflow

For this type of video, do I get the right colors for jpgs? Color space : YUV Chroma subsampling : 4:4:4 Color range : Limited Color primaries : BT.709 Transfer characteristics : BT.709 Matrix coefficients : BT.709 For the video, I tried making jpegs using this code, but the colors did not match: ffmpeg -i input.mkv -vf zscale=min=709:m=170m:rin=limited:r=full,format=yuv444p -qmin 1 -qmax 1 -q:v 1 output%03d.jpg
21:15
Split mp4 in chunks and stream to the browser? - Paul Newest 'ffmpeg' Questions - Stack Overflow

I have a regular mp4 file which I need to store into smaller chunks in separate locations, what's the proper way of splitting the file and then have the browser be able to play it by requesting chunks? I'm a bit confused about segments and fragments, can I do all of this with a single ffmpeg command? Something to split the file into 10s chunks and then still be able to stream it in the video tag by appending to the MediaStream buffer?
18:36
Remove video noise from video with ffmpeg without producing blur / scale down effect - Sucahyo Aji Newest 'ffmpeg' Questions - Stack Overflow

My videos are 1920x1080 recorded with high ISO (3200) using smartphone (to get bright view, backlight scene mode). It produce a lot of noise. I try many video filter but all of them produce blur similar to when we reduce the resolution in half then increase it back again. Is there a good video noise filter that only remove noise without producing blur? Because if it produce blur, I would prefer to not do any filtering at all. I have tried video filter: nlmeans=s=30:r=3:p=1 vaguedenoiser=threshold=22:percent=100:nsteps=4 (...) -- Part of the image
07:44
ffmpeg video created from images looks faded [closed] - Oscar Franco Newest 'ffmpeg' Questions - Stack Overflow

I'm creating a video from a series of png images I have generated. However, on the final video the colors look faded. Is there anyway to preserve the look of the images? Here is a sample image, it might be a little hard to tell due to compression but the hue of the green changes. Here are some of the commands I've used trying to get the colors to match: ffmpeg -framerate 60 -pattern_type glob -i 'capture/*.png' -c:v libx264 -preset slower -pix_fmt yuv420p -color_range tv -colorspace bt709 -color_primaries bt709 -color_trc iec61966-2-1 (...) -- ,
13:03
OpenCV VideoWriter using ffmpeg with "Could not open codec 'libx264'" Error - user2262504 Newest 'ffmpeg' Questions - Stack Overflow

I am new to OpenCV, and I want write Mat images into video using VideoWriter on Ubuntu 12.04. But when constructing VideoWriter, errors came out. It seems that OpenCV invoke ffmpeg API using default parameters and ffmpeg invoke x264 using its default parameters. Then these setting is broken for libx264. Thus the "Could not open codec 'libx264'" error. Anyone has ideas to solve this problem? More specifically: anyone knows where and how OpenCV invoke ffmpeg API? how to change ffmpeg default settings using code, hopefull, can be (...)
12:51
ffmpeg is making my audio and video frozen and I don't know why - Sdpro Newest 'ffmpeg' Questions - Stack Overflow

I'm using bunjs runtime to execute ffmpeg as terminal code but I don't know if my code is typescript code is wrong or ffmpeg is wrong and I'm using json file to get the clips correctly let videos = 0; let stepsTrim = ""; let concatInputs = ""; for (let i = 0; i < 40; i++) if (unwantedWords[i].keepORdelete === true) stepsTrim += `[0:v]trim=0:$ unwantedWords[i].start ,setpts=PTS[v$i];[0:a]atrim=0:$ unwantedWords[i].start ,asetpts=PTS-STARTPTS[a$i];[0:v]trim=$unwantedWords[i].start:$ (...)
11:27
Python OpenCV VideoCapture Color Differs from ffmpeg and Other Media Players - cliffsu Newest 'ffmpeg' Questions - Stack Overflow

I’m working on video processing in Python and have noticed a slight color difference when using cv2.VideoCapture to read videos compared to other media players. I then attempted to read the video frames directly using ffmpeg, and despite using the ffmpeg backend in OpenCV, there are still differences between OpenCV’s and ffmpeg’s output. The frames read by ffmpeg match those from other media players. Below are the videos I’m using for testing: test3.webm test.avi Here is my code: import cv2 import numpy as np import subprocess def (...) -- , , test3.webm, test.avi,
11:24
Segmentation Fault when calling FFMPEG on Lambda - but not locally - thiagogps Newest 'ffmpeg' Questions - Stack Overflow

I am trying to extract the next 30 seconds of audio from a live video stream on YouTube using AWS Lambda. However, I'm facing an issue where Lambda does not wait for an FFmpeg subprocess to complete, unlike when running the same script locally. Below is a simplified Python script illustrating the problem: import subprocess from datetime import datetime def lambda_handler(event, context, streaming_url): ffmpeg_command = [ "ffmpeg", "-loglevel", "error", "-i", streaming_url, "-t", "30", "-acodec", "pcm_s16le", "-ar", "44100", (...)
11:12
AWS Lambda Does Not Wait Until FFmpeg Subprocess Completes - thiagogps Newest 'ffmpeg' Questions - Stack Overflow

I am trying to extract the next 30 seconds of audio from a live video stream on YouTube using AWS Lambda. However, I'm facing an issue where Lambda does not wait for an FFmpeg subprocess to complete, unlike when running the same script locally. Below is a simplified Python script illustrating the problem: import subprocess from datetime import datetime def lambda_handler(event, context, streaming_url): ffmpeg_command = [ "ffmpeg", "-loglevel", "error", "-i", streaming_url, "-t", "30", "-acodec", "pcm_s16le", "-ar", "44100", (...)
10:53
How to record video and audio from webcam using ffmpeg on Windows? - Babu Newest 'ffmpeg' Questions - Stack Overflow

I want to record video as well as audio from webcam using ffmpeg, I have used the following codes to know what devices are available: ffmpeg -list_devices true -f dshow -i dummy And got the result: ffmpeg version N-54082-g96b33dd Copyright (c) 2000-2013 the FFmpeg developers built on Jun 17 2013 02:05:16 with gcc 4.7.3 (GCC) configuration: --enable-gpl --enable-version3 --disable-w32threads --enable-av isynth --enable-bzlib --enable-fontconfig --enable-frei0r --enable-gnutls --enab le-iconv --enable-libass --enable-libbluray (...)
09:04
How can we merge .cdg and .mp3 file in ffmpeg - Hemant Newest 'ffmpeg' Questions - Stack Overflow

I am trying to merge .cdg file and .mp3 file to make .mp4 file with help of ffmpeg. I am using following command: ffmpeg -i test.mp3 -i test.cdg -y test.MP4 MP4 file was created only with mp3 audio file. cdg file contain is missing
06:59
FFmpeg player backporting to Android 2.1 - one more problem - tretdm Newest 'ffmpeg' Questions - Stack Overflow

I looked for a lot of information about how to build and use FFmpeg in early versions of Android, looked at the source codes of players from 2011-2014 and was able to easily build FFmpeg 4.0.4 and 3.1.4 on the NDKv5 platform. I have highlighted the main things for this purpose: and before Android 2.2 (API Level 8) such a thing did not exist this requires some effort to implement buffer management for A/V streams, since in practice, when playing video, the application silently crashed after a few seconds due to overflow (below code example in C++ and (...) -- not officially included in Android 2.1 and above, my written build script
06:51
FFmpeg C++ API : Using HW acceleration (VAAPI) to transcode video coming from a webcam - nicoh Newest 'ffmpeg' Questions - Stack Overflow

I'm actually trying to use HW acceleration with the FFmpeg C++ API in order to transcode the video coming from a webcam (which may vary from one config to another) into a given output format (i.e: converting the video stream coming from the webcam in MJPEG to H264 so that it can be written into a MP4 file). I already succeeded to achieve this by transferring the AVFrame output by the HW decoder from GPU to CPU, then transfer this to the HW encoder input (so from CPU to GPU). This is not so optimized and on top of that, for the given above config (MJPEG => H264), I (...) -- https://github.com/FFmpeg/FFmpeg/blob/master/doc/examples/vaapi_transcode.c
04:29
When usg ffmpeg to convert from .mp4 to .avi, how do I get the .avi files to contain the correct (trimmed) frames from the .mp4? - cassenav Newest 'ffmpeg' Questions - Stack Overflow

I am using ffmpeg to convert a batch of .mp4 videos to the .avi format from the command line. The .mp4 videos are all trimmed videos that are sub-videos of a longer video. I have basically segmented the longer video into small, non-overlapping chunks (or maybe with a couple milliseconds of overlap), and I want to convert all of these smaller chunks (.mp4) to .avi. However, I am running into an issue: the .avi files all contain a some additional frames at the beginning of each video which I explicitly trimmed in the .mp4 videos. I'm not sure what exactly is causing this problem or how (...)
00:59
In mp4/h264, why does duplicate a frame need intensive re-encoding with ffmpeg? - kwjsksai Newest 'ffmpeg' Questions - Stack Overflow

What I want to achieve is to duplicate all frames in 30fps.mp4 and result in a 60 fps video. I tried ffmpeg -i 30fps.mp4 -filter:v fps=60 out.mp4. It does what I want but with re-encoding. And the question is can it be done without re-encoding but only remux? The reason I'm asking is because intuitively speaking, we usually do shallow copy when same data is used multiple times. So can it be done? Does the codec/container even allow (...)

16 avril

Newest 'ffmpeg' Questions - Stack Overflow http://stackoverflow.com/questions/tagged/ffmpeg

04:19
AVFilterGraph cancel initiating [closed] - KaisoHHH Newest 'ffmpeg' Questions - Stack Overflow

I am trying to use AVFilterGraph to filter render AVFrames from AVStream directly, but I'm facing a situation I might need to cancel the initiating since I may change the filter complex string frequently in a short time as the front end will change fast to adjust the filter complex string. And the init may take long because of my filter string includes some customized parts. I also thought about just async create other filter graph if I cannot just cancel the initiating process in avfilter_graph_parse_ptr. But I'm hesitant about memory leak it may cause. Wondering if (...)
19:41
How can I convert a ffmpeg command to the ffmpeg-python script? - leo87 Newest 'ffmpeg' Questions - Stack Overflow

I have a ffmpeg command for converting an audio file from .mpt to .aac and then combining it with a .mp4 video file to create a new video file, as shown below. I would like to convert these commands into a ffmpeg-python script. ffmpeg -i a.mp4 -vn -acodec copy a.aac ffmpeg -i v.mp4 -i a.aac -c:v copy -c:a copy -map 0:v:0 -map 1:a:0 output.mp4 Any suggestions on how to solve this problem please? Thanks in advance. I've managed to rewrite the first command in ffmpeg-python (it was easy) ( ffmpeg .input(a_input) .output('a.aac', (...)
20:43
Modify the ffmpeg command to work with more than one image - Koi Farm ĐaMi Newest 'ffmpeg' Questions - Stack Overflow

ffmpeg -y -i image.jpg -filter_complex "[0:v] scale=1280:-1,loop=-1:size=2,trim=0:40,setpts=PTS-STARTPTS,setsar=1,crop='w=1280:h=720:x=0:y=min(max(0, t - 3), (40 - 3 - 3)) / (40 - 3 - 3) * (ih-oh)'" unix.mp4 I want to edit the above command so it can be used for multiple images or a folder containing many images. And give all images used the same size and aspect ratio. Please help me, thank you everyone.
20:11
Cutting sections with -ss and -t is not frame accurate - Théo Champion Newest 'ffmpeg' Questions - Stack Overflow

I'm using ffmpeg 6.0 to extract small sections from longer videos. According to the doc i can use the -ss option to specify the start time and the -t option to specify the duration and this should result in frame accurate cuts (since FFmpeg 2.1). However, in my testing i found that the cuts are not frame accurate. I'm using the following command: ffmpeg -ss 10 -i ffmpeg -ss 10 -i https://storage.googleapis.com/klap-assets/Frame%20Counter%20%5B4K%2C%2060%20FPS%5D%20%E2%80%93%200100.mp4 -t 10 -y -vcodec libx264 -acodec aac -movflags +faststart out2.mp4 -t 10 -y (...) -- the doc, a video
19:52
Attempting to use recursion, why does my code only download 4 videos and exit? - Andrew Atwood Newest 'ffmpeg' Questions - Stack Overflow

I am attempting to download videos from an API that I have access to. This should loop through all of the videos that were returned from the API call, save them to disc, use ffmpeg to verify the meta data from the API (this step is necessary because the API is sometimes returning incorrect information), then save attribution information and continue on if no error. However, my output from the below code is simple this: [] Download Done: 0 Saved 'Owner: Anthony �; Owner URL: https://www.pexels.com/ⓐinspiredimages' to animals.txt 13 0 Download Done: (...)
17:21
FFmpeg -ss parameter is the video duration, Output file is empty - noun nil Newest 'ffmpeg' Questions - Stack Overflow

The main function is to obtain the corresponding video frame based on the input seconds.Before processing, the duration of the video will be obtained to determine whether the input is within the duration range of the video. If so, the corresponding instruction will be executed. > ffprobe input.mp4 ... Duration: 00:00:28.05, start: 0.000000, bitrate: 1136 kb/s > ffmpeg -ss 00:00:28 -i input.mp4 -frames:v 1 output.png ffmpeg version 7.0 Copyright (c) 2000-2024 the FFmpeg developers built with Apple clang version 15.0.0 (clang-1500.3.9.4) configuration: (...)
17:05
ffmpeg: Unrecognized option 'alpha_quality' - László Monda Newest 'ffmpeg' Questions - Stack Overflow

I want to make transparent videos work in Safari, which doesn't support WebM for this purpose but only H265 with alpha transparency. According to this post, I used Shutter Encoder, but only some of its versions work for this purpose on Mac. Instead of using Shutter Encoder on Mac, I want to use ffmpeg on my Linux PC. Shutter Encoder uses the following command in the background: ffmpeg -threads 0 -hwaccel none -i input.mov -c:v hevc_videotoolbox -alpha_quality 1 -b:v 1000k -profile:v main -level 5.2 -map v:0 -an -pix_fmt yuva420p -sws_flags bicubic -tag:v hvc1 -metadata (...) -- this post, only some of its versions work
13:13
Anomaly in raw I420 video generated by GStreamer - Lea Newest 'ffmpeg' Questions - Stack Overflow

Situation I'm trying to convert RGBA image data to YUV420P in multiple threads, then send this data to a main thread which splits the data it receives from each thread into separate frames and combines them in order to a video. Currently, I'm using FFmpeg for this task but I've found GStreamer to do a quicker job at colorspace conversion than FFmpeg. Problem The raw video generated by GStreamer does not match the expectations for YUV 4:2:0 planar video data. To test this, I've made a raw RGBA test video of 3 red 4x4 (16 pixel) frames. ffmpeg -f lavfi (...) -- , which corresponds to yuv420p as per their documentation, , multifilesink
10:57
How can I decode audio-file with ffmpeg? [closed] - skltynve Newest 'ffmpeg' Questions - Stack Overflow

I need to decode audio-file in C using library ffmpeg so I have array of numbers. How can I do that?
10:05
sws_scale YUV --> RGB distorted image - Sami susu Newest 'ffmpeg' Questions - Stack Overflow

I want to convert YUV420P image (received from H.264 stream) to RGB, while also resizing it, using sws_scale. The size of the original image is 480 × 800. Just converting with same dimensions works fine. But when I try to change the dimensions, I get a distorted image, with the following pattern: changing to 481 × 800 will yield a distorted B&W image which looks like it's cut in the middle 482 × 800 will be even more distorted 483 × 800 is distorted but in color 484 × 800 is ok (scaled correctly). Now (...)
08:30
How to minimize the delay in a live streaming with ffmpeg - Pasquale C. Newest 'ffmpeg' Questions - Stack Overflow

i have a problem. I would to do a live streaming with ffmpeg from my webcam. I launch the ffserver and it works. From another terminal I launch ffmpeg to stream with this command and it works: sudo ffmpeg -re -f video4linux2 -i /dev/video0 -fflags nobuffer -an http://localhost:8090/feed1.ffm In my configuration file I have this stream: Feed feed1.ffm Format webm NoAudio VideoCodec libvpx VideoSize 720x576 VideoFrameRate 25 # Video settings VideoCodec libvpx VideoSize 720x576 # Video (...)
07:36
Image mask blur processing problem using ffmpeg - andrew kim Newest 'ffmpeg' Questions - Stack Overflow

I want to apply blur using masking to two or more points in the image. I want to use a circular or other type of blur in ffmpeg rather than a box blur. I wrote the ffmpeg code, but an error continued. When there is only one blur, it works correctly, but when there are two or more blurs, an error occurs. No matter how much I search, I can't figure it out, so I'd like to ask for help. The ffmpeg code I wrote is as follows. ffmpeg -i input.mp4 -i mask.png -filter_complex "` [1:v]scale=200:200,pad=1920:1080:(ow-iw)/1:(oh-ih)/1[pmask1]; (...)
07:29
does ffmpeg support yuv420sp12le (p012le) - qianqian zhang Newest 'ffmpeg' Questions - Stack Overflow

does ffmpeg support yuv420sp12le, like p010le, is the ffmpeg support p012le, i.e. 12bpp per component, U and V are interleaved. I see the pixfmt.h of version 5.0, seems there is no format p012le, I see format p016l, 16bpp per component.
08:55
FFmpeg C++ API : Using HW acceleration (VAAPI) to transcode video coming from a webcam [closed] - nicoh Newest 'ffmpeg' Questions - Stack Overflow

I'm actually trying to use HW acceleration with the FFmpeg C++ API in order to transcode the video coming from a webcam (which may vary from one config to another) into a given output format (i.e: converting the video stream coming from the webcam in MJPEG to H264 so that it can be written into a MP4 file). I already succeeded to achieve this by transferring the AVFrame output by the HW decoder from GPU to CPU, then transfer this to the HW encoder input (so from CPU to GPU). This is not so optimized and on top of that, for the given above config (MJPEG => H264), I (...) -- https://github.com/FFmpeg/FFmpeg/blob/master/doc/examples/vaapi_transcode.c
06:48
fluent-ffmpeg video has stretched image - Martin Newest 'ffmpeg' Questions - Stack Overflow

I have an mp3 audio file and a jpg image file. I want to combine these two files into a new mp4. I have a working fluent-ffmpeg command that does exactly what I want, except somethings an image will be stretched in the final output video. It seems to happen consistently with jpgs I export from photoshop. Is there any way I can specify in my ffmpeg command to keep the same resolution of my image and not to stretch it? My function below: async function debugFunction() console.log('debugFunction()') //begin setting up ffmpeg const ffmpeg = (...) -- ,
06:04
Why does -filter:v fps=60 need re-encoding? - kwjsksai Newest 'ffmpeg' Questions - Stack Overflow

I mean, let's say 30 fps -> 60 fps. You just need to duplicate frames. Decode a frame and present it at 2 timepoints. I know mp4 can present a frame at different timepoints, right? So why is re-encoding needed? with h264 codec and heavy computing... I thought it could be just some metadata work. ffmpeg -i 30fps.mp4 -filter:v fps=60 out.mp4
03:23
ffmpeg Loop the short video so it can match the duration of the a long audio [closed] - andrew cummins Newest 'ffmpeg' Questions - Stack Overflow

I have a list of mp4 files and mp3 files in a directory. I need the following loop the short mp4 so it can match the duration of the mp3 file export mp4 file with new audio. But we want the mp4 in portrait mode. ffmpeg -stream_loop -1 -i video.mp4 -i audio.mp3 -map 0:v -map 1:a -preset slow -shortest -movflags +faststart output.mp4 I have this code in ffmpeg, but i would need to have output in portrait mode. the code works, but the issue is having the video output in portrait mode without stretching the (...)

15 avril

Newest 'ffmpeg' Questions - Stack Overflow http://stackoverflow.com/questions/tagged/ffmpeg

22:15
scalable looping slideshow ffmpeg command - Martin Newest 'ffmpeg' Questions - Stack Overflow

I have the below ffmpeg command which takes a 2 hour mp3 file and four image files and combines them to renders a single mkv video file where the 4 images appear in a slideshow where each image is displayed for an equal amount of time. I am using these files: https://file.io/XjYl2DDrLn6b Since the video is 2 hours long ( 7200 seconds ) and there are 4 images, each image gets displayed for 7200/4 = 1800 seconds. The logic for determining how to loop these image files is within the 'filter_complex' part of my ffmpeg command. [0:a]concat=n=1:v=0:a=1[a]; Use the (...) -- https://file.io/XjYl2DDrLn6b
19:28
ffmpeg output with label 'v' does not exist in any defined filtler graph - David Royale Newest 'ffmpeg' Questions - Stack Overflow

Been trying to make this Python code work but it fails up until rendering the final part: import subprocess import re import os def detect_idle_sections(video_path): command = ['ffmpeg', '-i', video_path, '-vf', 'select=\\'gt(scene,0.1)\\'', '-vsync', 'vfr', '-f', 'null', '-'] output = subprocess.check_output(command, stderr=subprocess.STDOUT).decode('utf-8') idle_sections = [] duration = 0.0 for line in (...)
18:07
FMP4 moof box sequence number ordering - Daniel Newest 'ffmpeg' Questions - Stack Overflow

I wanted to do a basic fragmented mp4 broadcast program with avformat libs and HTML5 video and MSE. This is a live stream and I use avformat to copy h264 data to mp4 fragments. Here is my basic drawing of clients attaching to the stream: So, with words: C1J: First Client joins: avformat process starts ftyp, moov, moof, mdat boxes will be served to Client1 ftyp and moov atoms are both saved for later reuse C2J: Second Client joins (later in time): avformat process is ongoing (because it is (...) --
16:12
dockerized python application takes a long time to trim a video with ffmpeg - Ukpa Uchechi Newest 'ffmpeg' Questions - Stack Overflow

The project trims YouTube videos. When I ran the ffmpeg command on the terminal, it didn't take too long to respond. The code below returns the trimmed video to the front end but it takes too long to respond. A 10 mins trim length takes about 5mins to respond. I am missing something, but I can't pinpoint the issue. backend main.py import os from flask import Flask, request, send_file from flask_cors import CORS, cross_origin app = Flask(__name__) cors = CORS(app) current_directory = os.getcwd() folder_name = (...)
11:39
"fmpeg" has no attribute "input" - Robin Singh Newest 'ffmpeg' Questions - Stack Overflow

I had previously built this youtube downloader but when I tested it recently; it stopped working. from pytube import YouTube import ffmpeg import os raw = 'C:\\ProgramData\\ytChache' path1 = 'C:\\ProgramData\\ytChache\\Video\\\\' path2 = 'C:\\ProgramData\\ytChache\\Audio\\\\' file_type = "mp4" if os.path.exists(path1 and path2): boo = True else: boo = False while boo: url = str(input("Link : ")) choice = int(input('Enter 1 for Only Audio and Enter 2 For Both Audio and Video \\n: (...)
11:02
Using FFMPEG and PHP to encode HLS video on the fly - mrsmith Newest 'ffmpeg' Questions - Stack Overflow

I'm re-encoding a MP4 video to HLS using FFMPEG with PHP. I'm trying to then directly serve to the output to a HTML page's tag. The following script (encode.php) encodes the video as I require and it works if I use the script url directly in VLC player for example but I'm struggling to get the gtml page to play it. The resulting video file should be compatible with most browsers. I use video.src = 'encode.php' on my player html page. Any help appreciated. <?php $input_video = 'whatever.mp4'; // video passthrough // (...)
10:35
frame extracted from a video using opencv or ffmpeg is vague, picture i snip from video is clear - user11317826 Newest 'ffmpeg' Questions - Stack Overflow

I record a video from roadside, and I want to recognize plate license in video. but I find that if I extract every frame from video using python, the frame is too vague to recognize. I have tried opencv and ffmpeg -i input.mp4 -ss 00:00:10.000 -vframes 1 output.png ` but if I snip video every second the picture is clear what's the reason of this phenomenon, how can I fix it I have tried frame average, it didn't (...)
10:05
FFmpeg dynamic cropping using sendcmd correct syntax? - Sulli Newest 'ffmpeg' Questions - Stack Overflow

I'm trying to dynamically crop a video using FFmpeg's sendcmd filter based on coordinates specified in a text file, but the crop commands do not seem to be taking effect. Here's the format of the commands I've tried and the corresponding FFmpeg command I'm using. Following the documentation https://ffmpeg.org/ffmpeg-filters.html#sendcmd_002c-asendcmd, commands in the text file (coordinates.txt) like this: 0.05 [enter] crop w=607:h=1080:x=0:y=0; 0.11 [enter] crop w=607:h=1080:x=0:y=0; ... Ffmpeg command: ffmpeg -i '10s.mp4' (...) -- https://ffmpeg.org/ffmpeg-filters.html#sendcmd_002c-asendcmd
09:29
Make a video 10h long while keeping it lightweight in filesize - keanu_reeves Newest 'ffmpeg' Questions - Stack Overflow

I created an mp4 file with no sound that is 0:17 minutes long. I also have this mp3 file that is 3mins long. I'd like to make a 10h video with those two, while keeping the filesize small. (8-15mb). Is there a way to achieve that with ffmpeg?
09:28
the problem using "yt-dlp --download-sections" [closed] - talent Newest 'ffmpeg' Questions - Stack Overflow

I tried to use "yt-dlp --download-sections" to download specific segment of YouTube video. But I have confronted some error. If I use the cammand as followed, it will be ok, and download the whole video successfully. yt-dlp -P [path] [URL] But, if I add the "--download-sections" to download specific segment, it seems something wrong. the command is as followed. yt-dlp -P [path] --download-sections "*00:08:06-00:08:17" https://www.youtube.com/watch?v=6Vkmb4cUuLs the eccor message Plus, the operation system is Windows. And I have used (...) -- the eccor message, ffmpeg configuration
08:57
Multiple named pipes in ffmpeg - Toto Briac Newest 'ffmpeg' Questions - Stack Overflow

This question is the follow-up of this question In my application I want to modify various mp3 and then mix them together. I know I could do it with a single command line in FFmpeg but it can end up very messy since I need to use various filter on each sample and I have five of them. My idea is to edit each sample individually, save them into a pipe and finally mix them. import subprocess import os def create_pipes(): os.mkfifo("pipe1") os.mkfifo("pipe2") def create_samp(): sample= subprocess.run(["ffmpeg", "-i", (...)
08:00
Swift A script of macOS is not running on the M2 chip? - Muhammad Danish Qureshi Newest 'ffmpeg' Questions - Stack Overflow

I am making a macOS app using SwiftUI, app is working fine on mac Intel chip, mac Apple M1 chip but not working on the mac M2 chip. Below is the following code which is crashing on M2 chip for force unwrapping the data in String(data: data!, encoding: .utf8). I know that force unwrap is not suitable, but for testing purpose I am doing force unwrap. When I run the which ffmpeg in terminal it provides the path in result, no matter which mac terminal is (it always return actual path of ffmpeg), but when run this command from the swift Program it does not found anything and got (...) -- , ,
07:40
Joining realtime raw PCM streams with ffmpeg and streaming them back out - Nathan Ladwig Newest 'ffmpeg' Questions - Stack Overflow

I am trying to use ffmpeg to join two PCM streams. I have it sorta kinda working but it's not working great. I am using Python to receive two streams from two computers running Scream Audio Driver ( ttps://github.com/duncanthrax/scream ) I am taking them in over UDP and writing them to pipes. The pipes are being received by ffmpeg and mixed, it's writing the mixed stream to another pipe. I'm reading that back in Python and sending it to the target receiver. My ffmpeg command is ['ffmpeg', '-use_wallclock_as_timestamps', (...)
07:15
ffmpeg produces duplicate pts with "wallclock_as_timestamps 1" option on MKV - Jax2171 Newest 'ffmpeg' Questions - Stack Overflow

I need to get real time reference of every keyframe captured by an IP camera. The -wallclock_as_timestamps 1 option seems to do the trick for us, however we are forced to replace the TS output container with MKV to get a correct PTS epoch value 1712996356.833000. Here is the ffmpeg command used: ffmpeg -report -use_wallclock_as_timestamps 1 -rtsp_transport tcp -i rtsp://user:password1ⓐ192.168.5.21/cam/realmonitor?channel=1channel1[1]=1subtype=0 -c:v copy -c:a aac -copyts -f matroska -y rec.mkv The capture process runs without any relevant worning or error messages. (...)
06:00
FFMPEG vsync drop and regeneration - Lhh92 Newest 'ffmpeg' Questions - Stack Overflow

According to the ffmpeg documentation vsync parameter Video sync method. For compatibility reasons old values can be specified as numbers. Newly added values will have to be specified as strings always. drop As passthrough but destroys all timestamps, making the muxer generate fresh timestamps based on frame-rate. It appears that the mpegts mux does not regenerate the timestamps correctly (PTS/DTS); however, piping the output after vsync drop to a second process as raw h264 does force mpegts to regenerate the PTS. Generate test (...)

14 avril

Newest 'ffmpeg' Questions - Stack Overflow http://stackoverflow.com/questions/tagged/ffmpeg

18:39
Script doesnt recognize bars / length right for cutting audio , ffmpeg terminal - totzillarbeats Newest 'ffmpeg' Questions - Stack Overflow

This terminal script doesn't recognize bars / length right for cutting audio, maybe somebody knows what's wrong with the calculation ... Would be happy about any help the cutting already works! #!/bin/bash # Function to extract BPM from filename get_bpm() local filename="$1" local bpm=$(echo "$filename" | grep -oE '[0-9]1,3' | head -n1) echo "$bpm" # Function to cut audio based on BPM cut_audio() local input_file="$1" local bpm="$2" local output_file="$input_file%.*_cut.$input_file##*." # (...)
15:01
Cannot get ffmpeg to work after installing from homebrew - phizzy Newest 'ffmpeg' Questions - Stack Overflow

I installed ffmpeg through homebrew but when I try to run it, even just typing in ffmpeg I get the following error message: dyld: Library not loaded: /usr/local/lib/liblzma.5.dylib Referenced from: /usr/local/bin/ffmpeg Reason: Incompatible library version: ffmpeg requires version 8.0.0 or later, but liblzma.5.dylib provides version 6.0.0 Trace/BPT trap: 5 I've tried running brew update and brew upgrade but that didn't change anything. Running brew doctor the only error I get is: Warning: You have a curlrc file If you have (...)
14:18
script doesnt recognize bars / lenght right for cutting audio , ffmpeg terminal - totzillarbeats Newest 'ffmpeg' Questions - Stack Overflow

This Terminal script doesnt recognize bars / lenght right for cutting audio , maybe somebody knows whats wrong with the calculation :) Would be happy about any help the cutting already works ! #!/bin/bash # Function to extract BPM from filename get_bpm() local filename="$1" local bpm=$(echo "$filename" | grep -oE '[0-9]1,3' | head -n1) echo "$bpm" # Function to cut audio based on BPM cut_audio() local input_file="$1" local bpm="$2" local output_file="$input_file%.*_cut.$input_file##*." # Appends "_cut" (...)
12:13
ffmpeg failed to load audio file - Vaishnav Ghenge Newest 'ffmpeg' Questions - Stack Overflow

Failed to load audio: ffmpeg version 5.1.4-0+deb12u1 Copyright (c) Failed to load audio: ffmpeg version 5.1.4-0+deb12u1 Copyright (c) 2000-2023 the FFmpeg developers built with gcc 12 (Debian 12.2.0-14) configuration: --prefix=/usr --extra-version=0+deb12u1 --toolchain=hardened --libdir=/usr/lib/x86_64-linux-gnu --incdir=/usr/include/x86_64-linux-gnu --arch=amd64 --enable-gpl --disable-stripping --enable-gnutls --enable-ladspa --enable-libaom --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libcdio --enable-libcodec2 --enable-libdav1d (...)
09:23
webrtc to rtmp send video from camera to rtmp link - Leo-Mahendra Newest 'ffmpeg' Questions - Stack Overflow

i cant send the video from webrtc which is converted to bufferd data for every 10seconds and send to server.js where it takes it via websockets and convert it to flv format using ffmpeg. i am trying to send it to rtmp server named restreamer for start, here i tried to convert the buffer data and send it to rtmp link using ffmpeg commands, where i initially started to suceesfully save the file from webrtc to mp4 format for a duration of 2-3 minute. after i tried to use webrtc to send video data for every 10 seconds and in server i tried to send it to rtmp but i cant send it, but (...)
02:43
Why do my Windows filenames keep getting converted in FFMPEG? - GeneralTully Newest 'ffmpeg' Questions - Stack Overflow

I'm running a script that walks through a large library of .flac music, making a mirror library with the same structure but converted to .opus. I'm doing this on Windows 11, so I believe the source filenames are all in UTF-16. The script calls FFMPEG to do the converting. For some reason, uncommon characters keep getting converted to different but similar characters when the script runs, for example: 06 xXXi_wud_nvrstøp_ÜXXx.flac gets converted to: 06 xXXi_wud_nvrstøp_ÜXXx.opus They look almost identical, but the Ü and I believe (...)

13 avril

Newest 'ffmpeg' Questions - Stack Overflow http://stackoverflow.com/questions/tagged/ffmpeg

04:22
Same FFmpeg command produces different Matroska MKV output file checksum [closed] - finefoot Newest 'ffmpeg' Questions - Stack Overflow

The following exemplary FFmpeg command takes an MP4 file, doesn't do any re-encoding, but simply writes the output to an MKV file: ffmpeg -i input.mp4 -c copy output.mkv If I run the same command twice, with two different output files: ffmpeg -i input.mp4 -c copy output1.mkv ffmpeg -i input.mp4 -c copy output2.mkv The resulting files will have differing checksums: aa46d308197cb08d71f271c61d5412ad output1.mkv 8b48c3ebdbf2384705fcb78e864d12e3 output2.mkv This difference disappears if I convert them back to an MP4 container: ffmpeg (...)
12:28
Extracting frames from a video does not work correctly [closed] - Al Tilmidh Newest 'ffmpeg' Questions - Stack Overflow

Using the libraries (libav) and (ffmpeg), I try to extract frames as .jpg files from a video.mp4, the problem is that my program crashes when I use the CV_8UC3 parameter, but by changing this parameter to CV_8UC1, the extracted images end up without color (grayscale), I don't really know what I missed, here is a minimal code to reproduce the two situations: #include extern "C" #include #include int main() AVFormatContext *formatContext = nullptr; if (avformat_open_input(&formatContext, "video.mp4", nullptr, nullptr) (...)
18:52
Why do my Windows filenames keep getting converted in Python? - GeneralTully Newest 'ffmpeg' Questions - Stack Overflow

I'm running a script that walks through a large library of .flac music, making a mirror library with the same structure but converted to .opus. I'm doing this on Windows 11, so I believe the source filenames are all in UTF-16. The script calls FFMPEG to do the converting. For some reason, uncommon characters keep getting converted to different but similar characters when the script runs, for example: 06 xXXi_wud_nvrstøp_ÜXXx.flac gets converted to: 06 xXXi_wud_nvrstøp_ÜXXx.opus They look almost identical, but the Ü and I believe also the (...)
17:10
conversion from YUV to RGB color - Prashant Newest 'ffmpeg' Questions - Stack Overflow

I'm trying to convert FFMPEG's Intensity color map from yuv format to rgb. It should give you colors as shown in the color bar in the image. You can generate a spectrogram using command: ffmpeg -i words.wav -lavfi showspectrumpic=s=224x224:mode=separate:color=intensity spectrogram.png Here is the code: import numpy as np def rgb_from_yuv(Y, U, V): Y -= 16 U -= 128 V -= 128 R = 1.164 * Y + 1.596 * V G = 1.164 * Y - 0.392 * U - 0.813 * V B = 1.164 * Y + 2.017 * U # Clip and normalize RGB (...) -- FFMPEG's Intensity,
16:13
ffmpeg merge multiple audio files with offset and duration into a single video file [closed] - CLIFFORD P Y Newest 'ffmpeg' Questions - Stack Overflow

Trying to merge two audio files into a single video at specific offset and duration What I tried checked previous stack overflow questions and answers, no one matched my requirements, below is the command i tried ffmpeg -i 5a54b260-f8a0-11ee-99e0-2d7afd1305f3.mp4 \\ -i 62d24fb0-f8a0-11ee-99e0-2d7afd1305f3.wav \\ -i 76cf3190-f8a0-11ee-99e0-2d7afd1305f3.wav \\ -filter_complex "[1:a]adelay=0|0,atrim=0:18[a1trimmed]; \\ [2:a]adelay=20000|20000,atrim=0:10[a2trimmed];\\ [a1trimmed][a2trimmed]amix=inputs=2[aout]" \\ -map 0:v -map "[aout]" -c:v copy -c:a aac (...)
09:53
ffmpeg produce pts duplicati con "wallclock_as_timestamps 1" on MKV - Jax2171 Newest 'ffmpeg' Questions - Stack Overflow

I need to get real time reference of every keyframe captured by an IP camera. The -wallclock_as_timestamps 1 option seems to do the trick for us, however we are forced to replace the TS output container with MKV to get a correct PTS epoch value 1712996356.833000. Here is the ffmpeg command used: ffmpeg -use_wallclock_as_timestamps 1 -rtsp_transport tcp -i rtsp://admin:adminⓐ192.168.1.5/h264/ch1/main/av_stream -c:v copy -c:a aac -copyts -f matroska -y rec.mkv The capture process runs without any relevant worning or error messages. However, playing the captured video (...)
06:40
FFMPEG not turning a series of .ppm files into a video - Radiation Sky Playz Newest 'ffmpeg' Questions - Stack Overflow

I don't have much of an idea of what i'm doing. also i don't use stackoverflow so i still don't know what i'm doing xd I'm trying to do this: ffmpeg -framerate 45 -i screen_200x200_%d.ppm -c:v libx264 -r 30 -pix_fmt yuv420p output52234.mp4 and it's making this appear: jajooⓐjajoospc:~/Documents/fff$ ffmpeg -framerate 45 -i screen_200x200_%d.ppm -c:v libx264 -r 30 -pix_fmt yuv420p output52234.mp4 ffmpeg version 4.4.2-0ubuntu0.22.04.1 Copyright (c) 2000-2021 the FFmpeg developers built with gcc 11 (Ubuntu 11.2.0-19ubuntu1) (...)
03:25
FFmpeg RTSP drop rate increases when frame rate is reduced - Avishka Perera Newest 'ffmpeg' Questions - Stack Overflow

I need to read an RTSP stream, process the images individually in Python, and then write the images back to an RTSP stream. As the RTSP server, I am using Mediamtx [1]. For streaming, I am using FFmpeg [2]. I have the following code that works perfectly fine. For simplification purposes, I am streaming three generated images. import time import numpy as np import subprocess width, height = 640, 480 fps = 25 rtsp_server_address = f"rtsp://localhost:8554/mystream" ffmpeg_cmd = [ "ffmpeg", "-re", "-f", "rawvideo", (...) -- https://github.com/bluenviron/mediamtx, https://github.com/FFmpeg/FFmpeg, https://github.com/bluenviron/mediamtx?tab=readme-ov-file#opencv

12 avril

Newest 'ffmpeg' Questions - Stack Overflow http://stackoverflow.com/questions/tagged/ffmpeg

20:40
How do I upscale an iOS App Preview video to 1080 x 1920? [closed] - Benjamin Thiel Newest 'ffmpeg' Questions - Stack Overflow

I just captured a video of my new app running on an iPhone 6 using QuickTime Player and a Lightning cable. Afterwards I created an App Preview project in iMovie, exported it and could successfully upload it to iTunes Connect. Apple requires developers to upload App Previews in different resolutions dependent on screen size, namely: iPhone 5(S): 1080 x 1920 or 640 x 1136 iPhone 6: 750 x 1334 (what I have) iPhone 6+: 1080 x 1920 Obviously, 1080 x 1920 is killing two birds with one stone. I know that upscaling isn't the perfect (...)
21:55
How to get the buffer of the first frame of a video using ffmpeg? (Node.js) - Mahmoud Walid Newest 'ffmpeg' Questions - Stack Overflow

I am trying to use child_processes and ffmpeg to do this, but it returns this error: FFmpeg stderr: [AVFilterGraph ⓐ 00000157fd55abc0] No option name near 'eq(n, 0)"' [AVFilterGraph ⓐ 00000157fd55abc0] Error parsing a filter description around: [AVFilterGraph ⓐ 00000157fd55abc0] Error parsing filterchain '"select=eq(n\\, 0)"' around: [vost#0:0/libx264 ⓐ 00000157fd574700] Error initializing a simple filtergraph Error opening output file pipe:1. Error opening output files: Invalid argument FFmpeg process exited with code: (...)
17:01
how to record screen of windows using ffmpeg inside WSL [closed] - Santhosh Newest 'ffmpeg' Questions - Stack Overflow

I have WSL2 and ubuntu installed inside it. I have ffmpeg command line installed inside it. Now I am not sure how to record the screen. Can someone help me what command options to be used to record screen (including windows UI) I tried the below command. Opened powershell in windows, then entered into wsl and then ran the below command ffmpeg -f x11grab -y -framerate 30 -s 1920x1080 -i :0.0 -c:v libx264 -preset superfast -crf 18 out.mp4 but it results in blank screen (...)
14:24
Segmentation fault caused by FFMPEG / SFML on Macos - Med ali Damergi ReTr0 Newest 'ffmpeg' Questions - Stack Overflow

I'm trying to code a basic video player function to use it in a game it's supposed to get a sfml window and a video link as inputs and run the video: extern "C" #include #include #include #include #include #include const AVCodec* pCodec = nullptr; void lecteurVideo(const std::string& videoPath, sf::RenderWindow& window) // Open the video file AVFormatContext* pFormatCtx = avformat_alloc_context(); if (avformat_open_input(&pFormatCtx, videoPath.c_str(), nullptr, nullptr) != 0) (...)
15:38
Streaming audio over websockets and process it with ffmpeg, Invalid frame size error - Nimrod Sadeh Newest 'ffmpeg' Questions - Stack Overflow

I am building an application in Python that processes audio data on a streaming connection with WebSockets. To work with it, I need to process it with ffmpeg on the server before passing it to some ML algorithms. I have the following ffmpeg code setup to process each byte sequence that comes over WebSockets: async def ffmpeg_read(bpayload: bytes, sampling_rate: int = 16000) -> np.array: ar = f"sampling_rate" ac = "1" format_for_conversion = "f32le" ffmpeg_command = [ "ffmpeg", "-i", "pipe:0", "-ac", ac, "-acodec", (...)
15:01
FFMPEG Partial Audio Filter of Video File - Cole Newest 'ffmpeg' Questions - Stack Overflow

I am trying to apply an audio filter to a section of the audio track on a video file. Here are some details. "video.mp4" is 1 minute and 36 seconds long. I want to lower the pitch of the first 30 seconds of the file. The video track does not need any change, so I can copy that and only transcode the audio. Note, I will have to do this same operation to other videos, with the pitch change at different times. This one is at the beginning, however. I have used this post for inspiration: (...)
16:10
Ffmpeg compilation fails due to undefined symbol _x264_encoder_open_112 for architecture x86_64 - S B Newest 'ffmpeg' Questions - Stack Overflow

I am compiling ffmpeg on Snow Leopard from source. Using Macport is not an option since I have some custom modification in ffmpeg. The make commands are: $ ./configure --enable-gpl --enable-libmp3lame --enable-static \\ --disable-shared --enable-libx264 --enable-pthreads \\ --disable-doc --enable-avfilter $ make The error: CC ffplay.o ffplay.c: In function ‘SDL_main’: ffplay.c:3157: warning: assignment discards qualifiers from pointer target type LD ffplay_g Undefined symbols for architecture x86_64: "_x264_encoder_open_112", (...)
13:37
Vulkan image data to AVFrames and to video - W4zab1 Newest 'ffmpeg' Questions - Stack Overflow

I am trying to encode Vulkan image data into video with MPEG4 format. For some reason the output videofile is corrupted. FFProbe shows discontinuity in timestamps, and the frames are corrupted. First I prepare my video encoder Then I get FrameEnded events from my engine where I can get the image data from the vulkan swapchain. I then convert the image data from vulkan to AVFrames (RGBA to YUV420P), then I pass the frames into queue. This queue is then handled in another thread, where the frames are processed, and written into video. I am bit of a noob with ffmpeg, (...)
10:44
Error: Output format mp4 is not available - alpaca pwaa Newest 'ffmpeg' Questions - Stack Overflow

I'm using fluent-ffmpeg in my nextjs application, I'm trying to process the video and specified a format to stream on my s3 bucket but it keeps on failing. My terminal keeps on throwing "Error: Error: Output format mp4 is not available". I already verify my ffmpeg format "ffmpeg -format" and confirm that it supports encoding and decoding mp4 files. I've already tried solutions from other forums but it's not working for me. createVideo: privateProcedure .input( z.object( fileId: z.string(), ) ) .mutation(async ( ctx, input ) => (...)
09:42
how to build the binaries in ffmpeg-kit - Harpreet Singh.8052 Newest 'ffmpeg' Questions - Stack Overflow

hey I want to use the ffmpeg in my android app and I used the ffmpeg-kit In the README of the ffmpeg-kit for android they write the steps to create binary but I'm facing difficulty understanding thest steps First is -> to setup android SDK or NDK i have checked these in my Android studio and I also added these in my environment variables Second -> is to install different packages autoconf automake libtool pkg-config curl git doxygen nasm cmake gcc gperf texinfo yasm bison autogen wget autopoint meson ninja ragel groff gtk-doc-tools libtasn1 im using windows (...) -- ffmpeg-kit, here
07:37
Save incoming frames from camera to video using ffmpeg - Liza Yemini Newest 'ffmpeg' Questions - Stack Overflow

I'm trying to record frames that I read from an industrial camera (such as - https://en.ids-imaging.com/store/u3-3680xle.html) in my C# code as bitmaps. I want to convert those bitmaps to video on the fly. My solution until now was -> Sending those bitmaps to a virtual camera (e2e soft vcam) and then record the camera with ffmpeg - using this command: -f dshow -i video=VCam -r 18 -vcodec libx264 Video.mp4 This is not working so well, because there are drop frames and the video is not smooth. There is another way to use ffmpeg for converting those images to (...) -- https://en.ids-imaging.com/store/u3-3680xle.html
07:57
Decode MP3, then increase the audio volume, and then encode the new audio - Blue Sky Newest 'ffmpeg' Questions - Stack Overflow

I want to first decode a MP3 audio file, and then increase the volume of the audio, and then encode it again into a new MP3 file. I want to use libavformat or libavcodec for this. Can you help me how I can do this? Any example?
03:36
Converting Multiple Videos from S3 into GIFs with Random Frames using Python and Lambda - rahulfaujdar Newest 'ffmpeg' Questions - Stack Overflow

I have a collection of videos stored in an S3 bucket, and I'm looking to automate the process of converting these videos into GIFs using Python and Lambda. Each resulting GIF should be precisely 10 seconds long and should contain random frames sampled from different parts of the corresponding video. By random frames, I mean frames from the beginning, middle, and end of each video, creating a dynamic GIF experience. I've started implementing this functionality using ffmpeg within a Python Lambda function, but I'm encountering difficulties in achieving the desired (...)

11 avril

Newest 'ffmpeg' Questions - Stack Overflow http://stackoverflow.com/questions/tagged/ffmpeg

13:19
Cannot change AVOutputFormat.flags and AVInputFormat.flags with appropriate ones [closed] - peko geshkov Newest 'ffmpeg' Questions - Stack Overflow

This is fragment from my working code using to grab livestream from source url and transmux it. ..... ifmt_ctx=avformat_alloc_context();//init input AVFormatContext ..... ifmt_ctx->flags|=AVFMT_FLAG_NONBLOCK|AVFMT_FLAG_GENPTS|AVFMT_FLAG_DISCARD_CORRUPT;//set some flags .... ifmt_ctx->iformat->flags |= AVFMT_TS_DISCONT;//set other flags to AVInputFormat .... ofmt_ctx=avformat_alloc_context();//init output AVFormatContext .... ofmt_ctx->flags|= AVFMT_FLAG_GENPTS|AVFMT_FLAG_NONBLOCK|AVFMT_FLAG_DISCARD_CORRUPT;//set some (...)
03:16
ffmpeg can NOT decode the mp4 file, which only have one IDR frame, Why? [closed] - user21201490 Newest 'ffmpeg' Questions - Stack Overflow

I have a mp4 file, which have only one IDR frame, ffplay can NOT play it, ffprobe can NOT extract video frame, and ffmpeg can NOT decode it, why? I use ffmpeg7.0 to try, but it always fail. Is it ffmpeg bug and how to render the IDR frame?
20:55
Capture rtsp stream to MP4 file with wallclock timestamp preserve moov atom - Jax2171 Newest 'ffmpeg' Questions - Stack Overflow

We are looking for the right ffmpeg options to capture the rtsp stream from an IP camera using the real time in epoch from the wall clock as a timestamps reference. Our current command is as follows: ffmpeg -use_wallclock_as_timestamps 1 -rtsp_transport tcp -i rtsp://admin:adminⓐ192.168.5.21/h264/ch1/main/av_stream -c:v copy -c:a aac -copyts -f mp4 -y record.mp4 The command works perfectly well except that, if for any reason the ffmpeg process were to stop abruptly, the output file "record.mp4" is unreadable with error: moov atom not found We simulated (...)
18:29
How the ffmpeg is fixing Handle page termination with same page number ...? [closed] - adarsh Newest 'ffmpeg' Questions - Stack Overflow

Im working on the teletext subtitle feature and faced with subs not clearing issue. the subtitle lines remain displayed until being replaced by a new version of the specific line. So the subtitles never disappear and often an old line is still displayed, after another, more recent line is displayed/updated. take a look at the issue in this sample video file: https://code.videolan.org/videolan/vlc/uploads/58c2e1660e94e2df5e8cdb75edf531d9/GODFATHER__03_.ts Issue reported : https://sourceforge.net/p/zapping/bugs/203/ The player is using ffmpeg and libzvbi library. At (...) -- https://code.videolan.org/videolan/vlc/uploads/58c2e1660e94e2df5e8cdb75edf531d9/GODFATHER__03_.ts, https://sourceforge.net/p/zapping/bugs/203/, https://github.com/FFmpeg/FFmpeg/commit/b1e0e216462a989a39e7b413aef6d32f8cedc154, https://github.com/zapping-vbi/zvbi/commit/40a6ab0200c46b67b059b5b1fb15793ce780892a
12:07
Emulate YUV420 stream for OpenCV - Ivan Newest 'ffmpeg' Questions - Stack Overflow

I'm working on a project that will treat the images coming from a camera in YUV420 format connected by ethernet. During the development, we can't have constant access to the camera so I wanted to emulate the behaviour. My idea is to take video, convert it from mp4 to yuv using ffmpeg: ffmpeg -i input.mp4 -pix_fmt yuv420p output.yuv Then, stream the video in an infinite loop. This works: ffmpeg -stream_loop -1 -f rawvideo -s 960x540 -r 30 -pix_fmt yuv420p -i output.yuv -f mpegts udp://127.0.0.1:23000 I managed to read (and show) the (...)
10:58
Python FFmpeg Video Streaming: how to capture multiple representations (resolutions) with webcam - LUKA TADIĆ Newest 'ffmpeg' Questions - Stack Overflow

I am trying to capture webcam stream and make HLS stream. I managed to create HLS stream for one Representation (only one stream resolution) but when I try to create (hls.output) more than one, I get this error: C:\\Users\\ltadic\\Desktop\\hls stream>C:/Users/ltadic/AppData/Local/Programs/Python/Python311/python.exe "c:/Users/ltadic/Desktop/hls stream/camera_stream.py" ERROR:root:ffmpeg failed to execute command: b"ffmpeg version 2022-12-11-git-c3e20f78b0-full_build-www.gyan.dev Copyright (c) 2000-2022 the FFmpeg developers\\r\\n built with gcc 12.1.0 (Rev2, Built by MSYS2 project)\\r\\n (...)
07:58
statistics.getTime() returns always total time of input file in milli seconds during the process in android - Hamza Newest 'ffmpeg' Questions - Stack Overflow

In 6.0-2 android how can i get the percentage because statistics.getTime() returns always total time of input file in milli seconds during the process but it was working proper in previous version 4.4.LTS because in that version it was returning the time based on how much process has complete. Current behavior It is returning total time of input file every time. Here is the link of my test application https://github.com/HamzaBula/Reverse-Video-Demo [Here is the screenshot for 4.4.LTS (frame and time both are perfect here)] (https://i.stack.imgur.com/OEZED.png) (...) -- https://github.com/HamzaBula/Reverse-Video-Demo, https://i.stack.imgur.com/OEZED.png, Here is the screenshot for 6.0-2 (frame is perfect but time is not)

10 avril

Newest 'ffmpeg' Questions - Stack Overflow http://stackoverflow.com/questions/tagged/ffmpeg

18:40
gstreamer cant demux a .ts video but ffmpeg can. How can I fix the error? - Zack Newest 'ffmpeg' Questions - Stack Overflow

I have a .ts video that when I run through a basic gstreamer pipeline I get an error that it can't demux the video. comand: gst-launch-1.0 filesrc location="/videos/my_video.ts" ! tsdemux ! meta/x-klv ! fakesink I get the error: Setting pipeline to PAUSED ... Pipeline is PREROLLING ... WARNING: from element /GstPipeline:pipeline0/GstTSDemux:tsdemux0: Delayed linking failed. Additional debug info: gst/parse/grammar.y(853): gst_parse_no_more_pads (): /GstPipeline:pipeline0/GstTSDemux:tsdemux0: failed delayed linking some pad of GstTSDemux (...)
16:02
FFMPEG command to write RTSP stream to file and make first frame screenshot - mao Newest 'ffmpeg' Questions - Stack Overflow

I'm writing RTSP-stream from IP-camera to HLS file with ffmpeg. Also I'm trying to make the first frame that comes when ffmpeg connects to camera written into separate PNG-file. I've found this command to achieve that: ffmpeg -rtsp_transport tcp -i rtsp://stream-url -an -hls_flags append_list -f hls -hls_playlist_type event -hls_list_size 0 -hls_segment_type mpegts -hls_segment_filename ./stream/%d.ts ./stream/index.m3u8 -frames:v 1 ./stream/thumbnail.png This command works well on Windows, writing HLS segments to stream folder and creating thumbnail.png (...)
14:35
Assign PTS to packet based on position in stream - user1055947 Newest 'ffmpeg' Questions - Stack Overflow

I have a TS with a video and metadata stream. The video has correctly set PTS values, while the metadata does not (ffprobe gives N/A for each). However, the metadata packets are positioned correctly in the stream. Is there a way I can assign the metadata packets a PTS based on their position in the stream. The exact precision is not important, as long as the PTS is somewhere in between the last and next video frame. As a last resort I will have to write some C code to do it, but I wanted to see if the ffmpeg frontend can do it. I need to do this because I need to offset one (...)
14:04
How to create video by stitching together images (.png) where the serial on each image file increases by 6 - DataStatsExplorer Newest 'ffmpeg' Questions - Stack Overflow

I am trying to create a video (preferably mp4) from a series of png images. However, the name of each image file increases by 6 every frame. For example, I would have depthframe_0000 as the first frame, and depthframe_0001 for the next frame. There are a few answers that have answered a similar question but I am unable to process the video when the image files are not increasing by 1. I would like to keep the fps at 5. I am using ffmpeg as the suggested in the answers above but am open to any other suggestion. The collab code that I have put together is as (...)
12:56
ffmpeg doesn't generate a ISO/IEC 14496-17 (MPEG-4 text) track when ingesting WebVTT subtitles to produce MPEGTS - Daniel Andres Pelaez Lopez Newest 'ffmpeg' Questions - Stack Overflow

We are trying to create a mpegts with an ISO/IEC 14496-17 (MPEG-4 text) subtitles track, using WebVTT, but seems like ffmpeg creates a ISO 13818-1 PES private data instead. The following is the ffmpeg command: ffmpeg -i subtitle.vtt -c:s mov_text -f mpegts output3GPP.ts This is using the following subtitle.vtt file: WEBVTT 00:00.000 --> 00:01.000 Subtitle 1 00:01.000 --> 00:02.000 Subtitle 2 00:02.000 --> 00:03.000 Subtitle 3 00:03.000 --> 00:04.000 Subtitle 4 And the following is the output of the ffprobe (...)
12:38
How to save fluent-ffmpeg output to URL? - volume one Newest 'ffmpeg' Questions - Stack Overflow

I am using fluent-ffmpeg to process videos and I want to save the final output file to a remote URL, not on the local server. Here is the code: ffmpeg('/path/to/file.mp4') .videoCodec(VideoCodec) .audioCodec(AudioCodec) .format('mp4') .output('http://localhost:8080/output.mp4') // This does not work at all .output('output.mp4') // this works but saves file locally which I'm not allowed to do .run(); How can I save the file directly to a remote location (that is, without saving it locally)? I (...) -- fluent-ffmpeg
11:53
Separating audio m4b file based on a cue file - Rick T Newest 'ffmpeg' Questions - Stack Overflow

Separating audio m4b file based on a cue file How can I split an audio m4b into separate files using a cue file? Note: The m4b file has no chapters that's why I need to use the cue file to split it. I did try AI but that didn't work. ffmpeg -i test.m4b -f segment -segment_times test.cue -c copy output_%02d.m4a I get errors. Invalid time duration specification 'test.cue' in times list test.cue Could not write header for output file #0 (incorrect codec parameters ?): Invalid argument The thing is I can load the cue (...)
09:22
How to encode from image to mp4 file use GPU? - user24185484 Newest 'ffmpeg' Questions - Stack Overflow

I'm trying to convert images folder to mp4 via FFmpeg AutoGen https://github.com/Ruslan-B/FFmpeg.AutoGen. I use the demo of FFmpeg.AutoGen.Example It is good for me but this is use CPU to encode.This is FFmpeg.AutoGen demo: private static unsafe void EncodeImagesToH264() var frameFiles = Directory.GetFiles("./frames", "frame.*.jpg").OrderBy(x => x).ToArray(); using var fistFrameImage = ReadFrame(frameFiles.First()); var outputFileName = "frames/out.h264"; var fps = 25; var sourceSize = new Size(fistFrameImage.Width, (...) -- https://github.com/Ruslan-B/FFmpeg.AutoGen
08:25
FFmpeg - Streaming from a rtsp server to a rtmp server - loosing packages - Ovidiu I. Newest 'ffmpeg' Questions - Stack Overflow

I'm trying to stream a video from a rtsp server to a rtmp one using FFmpeg. Tried multiple arguments for my command : ffmpeg.exe -re -i "rtsp://10.65.28.251:11442/video/live" -pix_fmt yuv420p -codec:v libx264 -tune animation -preset fast -crf 23 -maxrate 4M -bufsize 8M -f flv "rtmp://10.65.58.21:1935/rec/XB" ffmpeg.exe -re -i "rtsp://10.65.28.251:11442/video/live" -preset ultrafast -vcodec libx264 -tune zerolatency -b 900k -f flv "rtmp://10.65.52.131:1935/rec/XB I'm loosing a lot of packages as seen in the picture. I'm pretty new to FFmpeg so (...) --
03:56
Java Process start a subprocess and the main process cannot be terminated [closed] - Dodge_X Newest 'ffmpeg' Questions - Stack Overflow

I use java Process to run a script, the main process of the script start a subprocess, and the subprocess hanging, so I could not monitor if the script is closed. Process process = processBuilder.command(commands).start(); try (BufferedReader reader = new BufferedReader(new InputStreamReader(process.getInputStream()))) String line; while ((line = reader.readLine()) != null) log.info("win exec get msg:", line); // cannot be finished here int exitCode = process.waitFor(); log.info("script exited with code: " + (...) --
00:56
ffprobe vs C api ffmpeg gives different results on mp3 without id3 tag - Spider Newest 'ffmpeg' Questions - Stack Overflow

I have an issue with an application I'm writing with ffmpeg api. I have an mp3 file that is missing id3 tags (it starts with frame data 0xFFFB). Now if I'm running ffprobe on this file, the av_format_dump from ffprobe gives this info: [AVFormatContext ⓐ 0000015509158a00] Opening 'OhYeah.mp3' for reading [file ⓐ 0000015509158fc0] Setting default whitelist 'file,crypto,data' Probing mp3 score:1 size:2048 Probing mp3 score:25 size:4096 Probing mp3 score:51 size:8192 [mp3 ⓐ 0000015509158a00] Format mp3 probed with size=8192 and (...)

9 avril

Newest 'ffmpeg' Questions - Stack Overflow http://stackoverflow.com/questions/tagged/ffmpeg

17:57
How the ffmpeg fix is leading to clearing of teletext subtitles? [closed] - adarsh Newest 'ffmpeg' Questions - Stack Overflow

Im working on the teletext subtitle feature and faced with subs not clearing issue. https://sourceforge.net/p/zapping/bugs/203/ The player is using ffmpeg and libzvbi library. Luckily, this issue was fixed in ffmpeg- https://github.com/FFmpeg/FFmpeg/commit/b1e0e216462a989a39e7b413aef6d32f8cedc154 and also in zvbi: https://github.com/zapping-vbi/zvbi/commit/40a6ab0200c46b67b059b5b1fb15793ce780892a I know the root cause and fix in zvbi library, and how it is ignoring c4 flag in case the same page no. But i want to understand how the ffmpeg fix is (...) -- https://sourceforge.net/p/zapping/bugs/203/, https://github.com/FFmpeg/FFmpeg/commit/b1e0e216462a989a39e7b413aef6d32f8cedc154, https://github.com/zapping-vbi/zvbi/commit/40a6ab0200c46b67b059b5b1fb15793ce780892a
17:22
How to process and upload large video files directly to cloud with ffmpeg but without fragmented MP4? - volume one Newest 'ffmpeg' Questions - Stack Overflow

I am using ffmpeg via fluent-ffpmeg for Node.js to process videos uploaded by users. The problem I have is if a user uploades a huge movie file, say 8GB in size, then I don't want to store the file on the server as it will soon reach full capacity of space. I thought a way to tackle this was to stream the output from ffmpeg straight to cloud storage like AWS S3. The only way to do this (I believe) is using a PassThrough() stream: import PassThrough from 'node:stream'; import FFMpeg from 'fluent-ffmpeg'; let PassThroughStream = new (...) --
09:21
Is there a video processing test set to cover most scenarios? [closed] - 砸石头的西西弗 Newest 'ffmpeg' Questions - Stack Overflow

My application integrates ffmpeg, and there are often some special videos or parameters that I cannot handle correctly, but they cannot be discovered in advance, so I need a test set to help find bugs.I nedd a video processing test set to cover most scenarios. A test set which has some different kinds type of sample videos.
07:42
How to create animated gif from images files? [closed] - Daniel Lip Newest 'ffmpeg' Questions - Stack Overflow

i tried this command line D:\\Captured>ffmpeg -framerate 1/2 -start_number 1 -i "D:/New folder (76)/Image%d.png" -loop -1 D:/test.gif but getting error [image2 ⓐ 00000000026324a0] Could find no file with path 'D:/New folder (76)/Image%d.png' and index in the range 1-5 D:/New folder (76)/Image%d.png: No such file or directory here is a screenshot image of my folder with the images and i want to get only the images type png that start with the name Image (...) --

8 avril

Newest 'ffmpeg' Questions - Stack Overflow http://stackoverflow.com/questions/tagged/ffmpeg

23:10
How to pack the pyav.packet and distribute to another computer - lambertk Newest 'ffmpeg' Questions - Stack Overflow

I'm currently working on projects which needs to read frames from RTSP server on single entry of computer, do some preprocessing and distribute these frames with preprocessed metadata to different backend for different purpose. And after googling, I found that PyAV could be the solution which can retrieve the video from RTSP source and make it packets, which could possibly be sent to another computer. Considering the network bandwidth, transmit the packets instead of the decoded frames could be better choice. But now comes the problem, socket/MQ, usually only allows to (...) -- was rejected by the official team
22:53
Flutter ffmpeg_kit_flutter not able to DrawText over video - Sayed Idrees Newest 'ffmpeg' Questions - Stack Overflow

I am Trying to overlay text over the Video using ffmpeg dependency. i have tried many options, but my most recent commands are as follows, await FFmpegKit.execute( '-i $path -vf "drawtext="fontfile=TiktokFont.ttf:text=\\'Stack Overflow\\':fontcolor=white:fontsize=24:box=1:boxcolor=blackⓐ0.5:boxborderw=5:x=(w-text_w)/2:y=(h-text_h)/2"" -codec:a copy "$outputPath"') My pubspec Dependency: ffmpeg_kit_flutter: ^4.5.1 But the result is always like this. Error : No such filter: 'drawtext' Solutions (...) --
22:04
What are the licence free codecs for FFMPEG? - FunkyPizza Newest 'ffmpeg' Questions - Stack Overflow

So I've recently started implementing ffmpeg in an application that I do intend to distribute commercially. And I've had an hard time getting my head around the whole licensing process. The most commonly answered question I've seen seems to be about x264 which requires a paid licence from x264.org in order to use it commercially (right?). I started to look into mpeg4 instead but that too seemed to be locked behind some patent licensing fee (https://www.mpegla.com/programs/mpeg-4-visual/license-agreement/). I guess my question is the following, what (...) -- https://www.mpegla.com/programs/mpeg-4-visual/license-agreement/
18:15
Can't convert video with cuda after updating ffmpeg - Peppe Newest 'ffmpeg' Questions - Stack Overflow

i've used this command sometimes to convert 4k video into 1080p without problem with tool "ffmpeg batch" and ffmpeg 5.1? "2022-08-10-git-8fc7f0fdec-full_build-www.gyan.dev Copyright (c) 2000-2022 the FFmpeg developers built with gcc 12.1.0 (Rev2, Built by MSYS2 project)" : -map 0 -map -0:t -filter_complex "scale_cuda=1920:1080:format=yuv420p:interp_algo=lanczos,hwdownload" -fps_mode:v passthrough -c:v h264_nvenc -preset 18 -profile:v high -level 4.1 -b:v 13000K -rc cbr -c:a copy -c:s copy this with pre-input "-hwaccell cuvid" Now if i try to to the same with (...)
19:05
How to set the length metadata property with fluent-ffmpeg? - volume one Newest 'ffmpeg' Questions - Stack Overflow

I have transcoded a sample video using fluent-ffpmeg and want to set the length metadata property so that the player knows how long the video is going to be. To get the duration of the video I did this: import ffmpeg from 'fluent-ffmpeg'; function ffprobePromise() return new Promise((resolve, reject) => ffmpeg.ffprobe('/path/to/file'), function (err, metadata) FileDuration = metadata.format.duration; resolve() ); ) await ffprobePromise(); ffmpeg('path/to/output') (...) -- https://devxxx001.s3.amazonaws.com/sample_960x400_47sec.mp4, ffmpeg documentation
18:49
ffmpeg stops recording screen when I change system date - TestMechanic Newest 'ffmpeg' Questions - Stack Overflow

I am using following command to record screen to a video.avi file on Windows ffmpeg.exe -f gdigrab -framerate 5 -i desktop video.avi However when I change system date let say with +1 day the ffmpeg console start dumping errors like this st:0 invalid dropping or Too large number of skipped frames 259190 > 60000 av_interleaved_write_frame(): Invalid argument and as result video will be limited to the moment I switched the date Is there any way for ffmpeg to ignore those errors and resynch in some way even loosing few seconds of the (...)
14:57
Decoding and playing audio with ffmpeg and XAudio2 - frequency ratio wrong - Brent de Carteret Newest 'ffmpeg' Questions - Stack Overflow

I'm using ffmpeg to decode audio and output it using the XAudio2 API, it works and plays synced with the video output using the pts. But it's high pitched (i.e. sounds like chipmunks). Setting breakpoints I can see it has set the correct sample rate from the audio codec in CreateSourceVoice. I'm stumped. Any help would be much appreciated. CDVDAUDIO.cpp #include "DVDAudioDevice.h" HANDLE m_hBufferEndEvent; CDVDAudio::CDVDAudio() m_pXAudio2 = NULL; m_pMasteringVoice = NULL; m_pSourceVoice = NULL; m_pWfx = (...)
12:33
How can limit video duration before uploading and implement content detection in an ASP.NET Core 6 backend - ashok patel Newest 'ffmpeg' Questions - Stack Overflow

We are working on a project, essentially a social media app. In this project, I'm handling the backend development. Users can upload videos of up to one minute duration. Before saving the videos to the server, I need to convert all uploaded videos to MP4 format. Additionally, I also need to check if the videos contain any adult content. I am unsure how to start this task. I have downloaded an MP4 video from a website https://www.quickpickdeal.com/coding/download-sample-mp4-video-mp4-test-videos, and installed ffmpeg for converting video Mp4 for before saving it to the (...) -- https://www.quickpickdeal.com/coding/download-sample-mp4-video-mp4-test-videos
11:30
ffmpeg Node Screen recording does not have audio - user2500558 Newest 'ffmpeg' Questions - Stack Overflow

I am building a screen recording application using fluent-ffmpeg. let command = ffmpeg( source: '1:0' ) command.inputFormat('avfoundation') command.fps(60) command.videoCodec('libx264') command.audioBitrate('320k') command.audioCodec('libmp3lame') command.addOption('-pix_fmt', 'yuv420p') command.save('output.mp4') I am able to record the screen, but the audio of the screen is not being recorded. For example: When I play a YouTube clip and record my screen, the video (...)
10:59
timeshift Jumps in Live Streaming HLS Playback - matin Newest 'ffmpeg' Questions - Stack Overflow

some times in live streaming with hls (h264) client show a jump back in time shift but index.m3u8 and playlist.m3u8 is ok and segments are correctly generated I see this problem in our player and hls demo too is there any thing related too transcoding and ffmpeg cause or prevent this problem
09:46
FFmpeg - Channel relabelling of multi audio tracked video file [closed] - Mahi s Newest 'ffmpeg' Questions - Stack Overflow

I'm trying to relabel the audio channels of the multitrack audio, video files. For some reason I could not relabel the audio channels or audio streams using FFmpeg command. Can someone please help me with a ffmpeg command that can retain all the audio properties like audio count and retain the tracks unaltered(some ffmpeg commands that I have tried just picks one out of multiple streams and provides the output). Example scenario: I have a video file which has multi stream audio's (6 audio streams, 6 channel) file with audio format pcm, which was wrongly labelled as C C C C (...)
08:05
ffmpeg process hanging while using java Process to call the script - Dodge_X Newest 'ffmpeg' Questions - Stack Overflow

I want to merge some snapshot images to a video file, so I write a python script using ffmpeg-python to achieve it and it works fine when I run the script directly. ffmpeg.input( os.path.join(output, "screenshot_%04d.png"), framerate=frame_rate ).output(output_file, vcodec="libx264", pix_fmt="yuv420p").overwrite_output().run() # the log cannot be written while using java Process to call logging.info("ffmpeg process finished") but when I call the script by java process it cannot be finished even the output video has already been created. I need (...)
07:15
How to add a new filter to FFMPEG in c with third-party dependences - ucag Newest 'ffmpeg' Questions - Stack Overflow

I'm a newbie to FFMPEG development and want to add a customized filter to FFMPEG. I've followed the filter tutorial in the docs. However, it's just a very simplified example and not mentioned how to add other dependences to Makefile. Especially in libavfilter/Makefile, there is only a OBJS-(CONFIG_NAME_FILTER) += name.o for me to add my filter. I want to add a new video filter with third party dependencies, like third-party c code with some other dependences, third-party compiled .so on Linux, .dylib on Mac, .dll and .lib on Windows, etc. How can I add (...)
07:11
How to convert to flac with a specific bitrate? - Viktor Kushnir Newest 'ffmpeg' Questions - Stack Overflow

I want to convert aiff files to flac. On the output file I want to have: Sample Rate - 44.1 kHz Bits per sample - 16 Bitrate - 1411 kbps I use this command: ffmpeg -i A.aif -c:a flac -compression_level 0 -sample_fmt s16 -ar 44100 -b:a 1411 A.flac Output: Input #0, aiff, from 'A.aif': Duration: 00:03:18.80, start: 0.000000, bitrate: 1411 kb/s Stream #0:0: Audio: pcm_s16be, 44100 Hz, 2 channels, s16, 1411 kb/s Stream mapping: Stream #0:0 -> #0:0 (pcm_s16be (native) -> flac (native)) Press [q] to stop, [?] for (...)
07:08
How to fix "moov atom not found" error in ffmpeg? - user10664722 Newest 'ffmpeg' Questions - Stack Overflow

Well, I'm using this project to create a Telegram bot which receives URL of .mp4 files, downloads them on server and uploads them to Telegram. Issue Everything works fine so far, except converting certain .mp4 files. For example if I use a sample .mp4 video from https://sample-videos.com/. Then it works fine and converts it successfully. But if I use a video from some random website which is also simple .mp4 file, it doesn't work and throws this error: [mov,mp4,m4a,3gp,3g2,mj2 ⓐ 0x1932420] Format mov,mp4,m4a,3gp,3g2,mj2 detected only with low score (...) -- this, https://sample-videos.com/
07:27
avio_open() function returns -138 - checkright Newest 'ffmpeg' Questions - Stack Overflow

When I use ffmpeg4.4.1 to push rtmp to the desktop, the program returns -138 when running avio_open().I use dshow's screen-capture-recorder on the input side. My purpose is to capture the desktop in real time and use rtmp to push the stream. avdevice_register_all(); avformat_network_init(); AVFormatContext* pFmtCtx_In = nullptr; AVFormatContext* pFmtCtx_Out = nullptr; AVInputFormat* pInFmt = nullptr; AVDictionary* options = nullptr; int nVideoIndex = -1; int ret = 0; AVCodecParameters* pCodecParam = nullptr; AVCodecContext * (...)
01:23
Ffmpeg to add watermark and username to videos like tiktok - hazem khairy Newest 'ffmpeg' Questions - Stack Overflow

I am trying to use ffmpeg to add watermark and username (dynamic input) to videos same as tiktok. Currently I have the following command which adds an image to video but the transition is moving from left to right, my goal to make it appear in random positions as tiktok, and also to add username under the logo but not sure how to make it happen. ffmpeg -i testvideo.mp4 -i logo.png -filter_complex "[1][0]scale2ref=w=iw/10:h=ow/mdar[logo][main];[main][logo]overlay=x='mod(t\\,10)/10*W':y='if(lt(mod(t+2\\,8)\\,4)\\,H-h-H*20/100\\,H*20/100)'" -vcodec libx264 -crf (...)
01:03
Command-line streaming webcam with audio from Ubuntu server in WebM format - mjtb Newest 'ffmpeg' Questions - Stack Overflow

I am trying to stream video and audio from my webcam connected to my headless Ubuntu server (running Maverick 10.10). I want to be able to stream in WebM format (VP8 video + OGG). Bandwidth is limited, and so the stream must be below 1Mbps. I have tried using FFmpeg. I am able to record WebM video from the webcam with the following: ffmpeg -s 640x360 \\ -f video4linux2 -i /dev/video0 -isync -vcodec libvpx -vb 768000 -r 10 -vsync 1 \\ -f alsa -ac 1 -i hw:1,0 -acodec libvorbis -ab 32000 -ar 11025 \\ -f webm /var/www/telemed/test.webm However (...)

7 avril

Newest 'ffmpeg' Questions - Stack Overflow http://stackoverflow.com/questions/tagged/ffmpeg

13:34
Ffmpeg: Compile argument for 'delogo' [closed] - Sulli Newest 'ffmpeg' Questions - Stack Overflow

I use a custom version of ffmpeg I compiled myself (for cuda support), but when I try to use the delogo filter I get: [AVFilterGraph ⓐ 0x586ea2283880] No such filter: 'delogo' [vost#0:0/mpeg4 ⓐ 0x586ea2281cc0] Error initializing a simple filtergraph What argument should I use when compiling in order to be able to use this filter? And can you tell me at the same time where I can find this information online? It’s not the first time I can’t use a filter because of a missing library and if I’m not mistaken, the ffmpeg documentation does not mention it. (...) -- https://ffmpeg.org/ffmpeg-filters.html#delogo
22:45
AWS Lambda - FFmpeg to extract frames doesn't write anything - Stormsson Newest 'ffmpeg' Questions - Stack Overflow

I have a lambda with a ffmpeg layer on it. The command i want to use is basically ffmpeg -i video.mp4 -qscale:v 2 -vf fps=8 '%04d.jpg' so it has an input file, and creates 8 frames per second in the same folder This code seems to do everything except writing the files, what am I missing ? import ... SIGNED_URL_TIMEOUT = 60 FPS_SAMPLES = 8 def lambda_handler(event, context): # Set up logging. logger = logging.getLogger(__name__) s3_client = boto3.client('s3') s3_source_bucket = (...)
20:32
How to list device options in ffmpeg with its avdevice C++ API? - Pavel Saenko Newest 'ffmpeg' Questions - Stack Overflow

How to list all available device("dshow and v422 source for example") options(formats/resolutions/fps) and chose the preferred one from the C++ API? I know that it is possible using CLI ffmpeg -f dshow -list_options true -i video="Integrated Camera" But how to use it into my C++ application? I tried to find some useful fields inside the AVDeviceInfoList struct, but it doesn`t contains any options list. AVDeviceInfoList* deviceList; int deviceCount = avdevice_list_input_sources(inFormat, nullptr, nullptr, &deviceList); for (...)
17:56
Transcode WEBM to RTMP - Justin White Newest 'ffmpeg' Questions - Stack Overflow

Summary My goal is to take a webcam stream from the browser and feed it into a program called Restreamer that takes in an RTMP stream. I've deduced that the browser Recording API produces Blobs that can be saved as WEBM. In order to stream the WEBM content to Restreamer I am attempting to use FFmpeg. I've read that forcing FLV format is required but otherwise all of the arguments are Greek to me. I've been unable to find a comparable topic where someone has tried to go from WEBM to RTMP. I have found examples of going the other direction, but reversing the (...) -- Restreamer, Recording API, warning than an error, here, no longer an option
18:20
FFmpeg Streaming Video SpringBoot endpoint not show video duration in video players - lxluxo23 Newest 'ffmpeg' Questions - Stack Overflow

it turns out that I've been working on a personal project just out of curiosity. the main function is to stream video by first encoding it through ffmpeg then playback said video from any other device call it "plex" very very primitive although I achieve my goal which is to encode and send the video to the devices that make the request this video is sent so to speak as a live broadcast. I can only pause it, no forward or rewind, anyone have any idea what I am doing wrong or if I should take some other approach either in my service or controller? I leave (...) -- screenshot, repo
17:30
ffmpeg concat command Cannot find a matching stream for unlabeled input pad 3 on filter Parsed_concat_0 - janosdupai Newest 'ffmpeg' Questions - Stack Overflow

The command "flutter ffmpeg" has been working perfectly fine so far, but now I'm receiving the following error message. Do you see any errors in the command? "matching stream for unlabeled input pad 3 on filter Parsed_concat_0" -y -i /var/mobile/Containers/Data/Application/26327694-3478-4DC9-B50A-E8D3B35F1918/Documents/camera/videos/REC_5FC1769A-5373-438B-A497-F10259C9F312.mp4 -i /var/mobile/Containers/Data/Application/26327694-3478-4DC9-B50A-E8D3B35F1918/Documents/camera/videos/REC_1690082E-558D-44D2-9103-5EFB3541F600.mp4 -filter_complex "concat=n=2:v=1:a=1 [v] [a]" -map (...)
15:12
mp4 And Rotation - Remove Flags But Set Rotation - Bud Newest 'ffmpeg' Questions - Stack Overflow

I'm having a hard time with the rotation on some mp4 files I have. It may well be my poor understanding, so forgive me if I set out what I know (or think I know) and then what I want to happen. An mp4 has, obviously, a right way up - that is, the way you want it to show when you watch it. Call this the orientation. This isn't metadata - it's just the way you, as a person, want to see the image, with people's heads at the top of the screen and their feet at the bottom. As part of the metadata, mp4 files have a value/parameter (I believe called (...)
14:18
Ffmpeg : Improve results with h264_nvenc video codec - Sulli Newest 'ffmpeg' Questions - Stack Overflow

I was very happy to discover ffmpeg is compatible with Cuda as using a GPU speeds up my processing time by 10 at least. But I was very sad to discover codec libx264 can’t be used and h264_nvenc is of much poorer quality (my videos are visibly pixelated, to the point I actually don’t see why ffmpeg was made compatible with Cuda in the first place :) ). I did not tweak my ffmpeg commands at all when I switched from libx264 to h264_nvenc, but maybe there are some parameters I could add to get a better quality? Even if it leads to longer processing time, I don’t mind trading a bit of that (...)
07:46
MP4 to MP3 directly from URL C# [closed] - k-s Newest 'ffmpeg' Questions - Stack Overflow

We have MP4 URLs and we need to convert them into MP3 files and store MP3s on CDN. The current solution we have is downloading MP4 on a local drive and then creating MP3 and putting it on CDN. I am currently using FFMPEG for the same. Convert video MP4 audio to MP3 using C# To be more specific - we have Vimeo video file URLs as well as direct MP4 files that we can show on our portal. We have one tool that shows MP3 audio and also displays transcription of it. My current code is as per the above URL where we are using FFMPEG for conversion. There is one library called NReco (...)
00:48
ffmpeg: Remove invalid APP fields when streaming webcam to file - Richie Bendall Newest 'ffmpeg' Questions - Stack Overflow

Logitech's proprietary MJPEG format embeds an inner H264 stream within the JPEG frames as APP attachments. Presently, I'm solely piping the video stream straight into the output file. ffmpeg -f dshow -i video="HD User Facing" -c:v copy -rtbufsize 2000M output.mkv How do I configure ffmpeg to remove that additional H264 stream while retaining the original MJPEG data, so that I may save storage? I could not find any useful option in the (...)

6 avril

Newest 'ffmpeg' Questions - Stack Overflow http://stackoverflow.com/questions/tagged/ffmpeg

14:01
Overlay a 16/9 video to a 9/16 ratio and shrink the original video [closed] - thanhbo Newest 'ffmpeg' Questions - Stack Overflow

I assume the video has an aspect ratio of 16/9 (size 1920:1080). I want to convert it to 9/16 ratio and shrink the original video. The formula I wrote is as follows but there is an error. I hope someone can help, thank you. ffmpeg -y -i A1.mp4 -filter_complex "split[crp0][crp1];[crp0]scale=iw:2*trunc(iw*16/18),boxblur=luma_radius=min(h\\,w)/20:luma_power=1:chroma_radius=min(cw\\,ch)/20:chroma_power=11,setsar=1[bg],[1:v]scale=(iw-100):-1[bg2];[bg][bg2]overlay=(W-w)/2:(H-h)/2[bg3]" -map "[bg3]" bg3.mp4 ffmpeg -y -i A1.mp4 -filter_complex (...)
20:42
Streams stop when creating a quad split Multi-viewer using FFMPEG [closed] - Chris Parker Newest 'ffmpeg' Questions - Stack Overflow

Created a FFMPEG script that takes in 4 SRT Live Streams and displays them in a quad split MV. However when I launch this script all 4 SRT streams will play but 3 will pause and 1 will play. ffmpeg \\ -re -hwaccel auto -hwaccel_output_csp videocore \\ -stream_loop -1 \\ -i "srt://address:5000?streamid=stream-id" \\ -stream_loop -1 \\ -i "srt://address:5000?streamid=stream-id" \\ -stream_loop -1 \\ -i "srt://address:5000?streamid=stream-id" \\ -stream_loop -1 \\ -i "srt://address:5000?streamid=stream-id" \\ -filter_complex (...)
17:12
Apache Tika 2.0.9 programm ffmpeg and exiftool not found? - mj44 Newest 'ffmpeg' Questions - Stack Overflow

I use an JavaFX Maven Project to use Apache Tika Version 2.9.0. The Java Test program will be finished and all methods that I create will done right. I have in the log file a lot of DEBUG errors and Idon't know why? I habe spent many hours to clear the problem. Here's an excerpt of the logfile 2024-04-03 14:56:12 [main] DEBUG org.apache.tika.parser.external.ExternalParser - exception trying to run ffmpeg java.io.IOException: Cannot run program "ffmpeg": CreateProcess error=2, Das System kann die angegebene Datei nicht finden at (...)
16:38
How can i make fluent-ffmpeg to work in angular 8 - Js doee Newest 'ffmpeg' Questions - Stack Overflow

I'have installed 'fluent-ffmpeg' plugin in my project and I added it to my angular project this way var ffmpeg = require('fluent-ffmpeg') and i also used this method import * as ffmpeg from 'fluent-ffmpeg' I'm getting the following issues while building using ng serve ERROR in ./node_modules/fluent-ffmpeg/index.js Module not found: Error: Can't resolve './lib-cov/fluent-ffmpeg' in '/home/projects/angular/demo/node_modules/fluent-ffmpeg' ERROR in ./node_modules/fluent-ffmpeg/lib/ffprobe.js Module not (...)
10:15
cv2/ffmpeg "grabFrame packet read max attempts exceeded" error after exactly reading certain number of frames - banjaxing Newest 'ffmpeg' Questions - Stack Overflow

I am using OpenCV to extract frames from videos, run a segmentation AI model, and save the frames and masks to a folder. When I run my code to extract the frame from I encounter the error "grabFrame packet read max attempts exceeded" after processing a certain number of frames. This issue occurs consistently for the same videos across multiple environments. Error message: [ WARN:0ⓐ379.898] global cap_ffmpeg_impl.hpp:1541 grabFrame packet read max attempts exceeded, if your video have multiple streams (video, audio) try to increase attempt limit by setting environment variable (...)
11:16
FFmpeg fails to draw text - Edoardo Balducci Newest 'ffmpeg' Questions - Stack Overflow

I've rarely used ffmpeg before, so, sorry If the question is too dumb. I have a problem adding a text layer to a video frame using ffmpeg. This is my current code: import subprocess from PyQt5.QtGui import QPixmap, QImage from PyQt5.QtWidgets import QLabel class VideoThumbnailLabel(QLabel): def __init__(self, file_path, *args, **kwargs): super().__init__(*args, **kwargs) self.video = video video_duration = self.get_video_duration(file_path) thumbnail_path = self.get_thumbnail(file_path, video_duration) if (...)
06:04
very low latency streaminig with ffmpeg using a webcam - userDtrm Newest 'ffmpeg' Questions - Stack Overflow

I'm trying to configure ffmpeg to do a real-time video streaming using a webcam. The ffmpeg encoder command I use is as follows. ffmpeg -f v4l2 -input_format yuyv422 -s 640x480 -i /dev/video0 -c:v libx264 -profile:v baseline -trellis 0 -subq 1 -level 32 -preset superfast -tune zerolatency -me_method epzs -crf 30 -threads 0 -bufsize 1 -refs 4 -coder 0 -b_strategy 0 -bf 0 -sc_threshold 0 -x264-params vbv-maxrate=2000:slice-max-size=1500:keyint=30:min-keyint=10: -pix_fmt yuv420p -an -f mpegts udp://192.168.1.8:5001 The ffplay command used to display the video (...)
04:27
Babel Loader error when using ffmpeg.wasm in CRA react app - Sooraj Chandu Newest 'ffmpeg' Questions - Stack Overflow

I am trying to implement a video editor using ffmpeg-wasm in CRA react app. Package dependencies : "ⓐffmpeg/ffmpeg": "^0.12.10", "ⓐffmpeg/util": "^0.12.1", Below is a sample class that I am trying to implement: import React, useRef, useState from 'react'; import FFmpeg from "ⓐffmpeg/ffmpeg"; import toBlobURL, fetchFile from "ⓐffmpeg/util"; function Trimmer() const [loaded, setLoaded] = useState(false); const ffmpegRef = useRef(new FFmpeg()); const videoRef = useRef(null) const messageRef = (...)
00:25
No such file or directory: 'ffmpeg' in Django/Docker - tthheemmaannii Newest 'ffmpeg' Questions - Stack Overflow

I run my Django code in Docker. I run transcription software that requires ffmpeg to function. However I've been getting the error [Errno 2] No such file or directory: 'ffmpeg' whenever I try to run my code. Here's my views.py: def initiate_transcription(request, session_id): ... with open(file_path, 'rb') as f: path_string = f.name transcript = transcribe_file(path_string,audio_language, output_file_type) ... Here's my Dockerfile: # Pull base image FROM python:3.11.4-slim-bullseye # Set (...)

5 avril

Newest 'ffmpeg' Questions - Stack Overflow http://stackoverflow.com/questions/tagged/ffmpeg

18:30
VScode ffmpeg.dll missing - YMRTZ Newest 'ffmpeg' Questions - Stack Overflow

When I tried to open VScode, I got an error popup saying "The code execution cannot proceed because ffmpeg.dll was not found. Reinstalling the program may fix this problem". Reinstalling VScode solved the issue, but I'm wondering what caused it in the first place, as apparently it's a video/audio file .dll, and I don't know what VScode has to do with it. The error -- The error
09:24
NodeJS/Dokku/Docker: ffmpeg exited with code 127 - Matt Molnar Newest 'ffmpeg' Questions - Stack Overflow

I'm trying to run ffmpeg inside of a Docker container via Dokku. I've heavily modified a Dokku plugin to accomplish this as I need h264 support. I currently get an error from fluent-ffmpeg which states Error: ffmpeg exited with code 127 I've tried to look up what error code 127 is but haven't found much. Some people seem to suggest that it's some sort of issue with finding ffmpeg. However, I did have a libx264 error from ffmpeg earlier in the process so I'm pretty sure the ffmpeg binary is being found. Unfortunately fluent (...) -- heavily modified
07:41
FileNotFoundError: [WinError 2] The system cannot find the file specified - FFMPEG - shiftyscales Newest 'ffmpeg' Questions - Stack Overflow

I am running a script using conda environment on Windows and getting this error (stack trace below), which is apparently caused by python executable not being able to find the ffmpeg.exe. There are numerous questions about this, but none of the solutions unfortunately worked for me, so I hope someone has fresh ideas. What I tried: conda install -c conda-forge ffmpeg (after this I can run ffmpeg in command line, but still getting the error) pip install ffmpeg-python Added the folder where ffmpeg.exe is located in conda env to the Windows Path as well as to sys.path in (...)
07:40
define the input FPS of a stream using ffmpeg-python - tamirg Newest 'ffmpeg' Questions - Stack Overflow

Im creating an HLS playlist using ffmpeg, reading my input from an RTSP stream. When probing the RTSP stream, i get an FPS which is not the true FPS, and i want to "tell" ffmpeg the actual real FPS. In the command line, im using the -r flag, which works fine: ffmpeg -rtsp_transport tcp -r 18 -i rtsp://localhost:554/test -b:v 100KB -vf format=yuvj420p -c:a copy -hls_time 2 -hls_list_size 10 -hls_flags delete_segments -start_number 1 output.m3u8 I noticed that flag must come before the input param. If i use the -r after, it simply doesnt work. In ffmpeg-python, (...)
05:35
How to preserve colours when colour metadata is "unknown" - Hashim Aziz Newest 'ffmpeg' Questions - Stack Overflow

I often need to scale up many files with unknown color metadata (probably because FFmpeg itself was dropping that metadata until very recently): $ ffprobe -v error -show_streams "input.mp4" | grep color color_range=tv color_space=unknown color_transfer=unknown color_primaries=unknown No matter what I do to try and preserve the colours in these files, nothing works to prevent the colours from shifting, usually coming out darker than the input. I've already tried: Setting all four color metadata options (-colorspace, -color_trc, (...)
06:07
Video to GIF Conversion with Random Frames on AWS Lambda using Nodejs and ffmpeg - rahulfaujdar Newest 'ffmpeg' Questions - Stack Overflow

I'm seeking assistance with automating the conversion of several videos stored in an S3 bucket into GIFs. Specifically, I aim to generate GIFs that are precisely 10 seconds long, each comprising random frames sampled from different sections of the original video. The randomness should encompass frames from the beginning, middle, and end of each video, ensuring a varied and engaging GIF output. Currently, I'm in the process of implementing this functionality using Nodejs and AWS Lambda, utilizing ffmpeg for video processing. However, I'm facing challenges in achieving (...)
03:47
ffmpeg ignoring framerate settings when trancsoding mp4 to mxf - Matt B Newest 'ffmpeg' Questions - Stack Overflow

I'm using ffmpeg to transcode an mp4 file to an mxf file for proxies. The main problem: ffmpeg ignores my framerate settings and always encodes the output video at 59.9 fps instead of the requested 58. In this case, the input video has an FPS of 58 (actually an avg framerate of 57442500/996461 as reported by an ffmpeg probe), and I require the output to match, but ffmpeg overrides me and sets it to 59.9. No matter what I try, I cannot get ffmpeg to write the output file at 58 fps. I've tried the -r and -framerate arguments and I've tried the fps=58 option (...) -- pastebin
01:52
Fastest way to extract moving dynamic crop from video using ffmpeg - NateW Newest 'ffmpeg' Questions - Stack Overflow

I'm working on an AI project that involves object detection and action recognition on roughly 30 minute videos. My pipeline is the following: determine crops using object detection model extract crops using Python and write them to disk as individual images for each frame. use action recognition model by inputting a series of the crops. The models are fast but actual writing of the crops to disk is slow. Sure, using an SSD would speed it up but I'm sure ffmpeg would greatly speed it up. Some of the challenges with the crops: the (...) --

4 avril

Newest 'ffmpeg' Questions - Stack Overflow http://stackoverflow.com/questions/tagged/ffmpeg

23:14
how to us google ML kit Selfie segmentation in flutter to overlay segmented user on top of chosen image or video? [closed] - Amr Newest 'ffmpeg' Questions - Stack Overflow

I'm working on implementing a virtual background feature using the Google ML Kit selfie segmentation Flutter plugin. The goal is to separate the user from the background live from the camera feed, overlay the user on a chosen image or video, and then create a new video combining these elements. Currently, I'm successfully obtaining the mask using the plugin. However, I'm concerned about performance issues if I directly copy pixels to achieve the overlay effect, especially in real-time scenarios. I'm looking for alternative approaches or best practices to (...)
15:38
FFMPEG - How to reduce frame rate without slow motion effect? [closed] - crater33 Newest 'ffmpeg' Questions - Stack Overflow

I have an MP4 video that's 21 minutes long, that was shot on a GoPro Hero 9 Black at 2.7k and 240 frames per second using HEVC. I would like to use FFMPEG to reduce the frame rate, with the output being a video that is also 21 minutes long and 2.7k ... but with a frame rate of 120 frames per second. But when I use the command "ffmpeg -i input.mp4 -filter:v fps=120 output.mp4 I get a video that is 42 minutes long. I would like to tell FFMPEG to simply delete every other frame of the input video, while keeping the total length of the video the same. What command would I use (...)
20:50
Streaming fails when I activate hls - yieniggu Newest 'ffmpeg' Questions - Stack Overflow

I'm currently testing a local server with nginx and the rtmp module in order to receive video streams. It's working just fine, but I want to add hls/dash in order to reproduce the streams on html. However, when I add this functionality to the config file the sources start complaining about the server and stop streaming. For example, if am streaming through OBS I got a message that is attempting to reconnect every 2 seconds with no success. If I use ffmpeg as : ffmpeg -re -i 'pescado.mp4' -c:v libx264 -preset slower -tune zerolatency -c:a aac -f flv (...) -- How To Set Up a Video Streaming Server using Nginx-RTMP on Ubuntu 22.04
15:03
Can anyone tell me ffmpeg.wasm command to converting 24-bit color image to 8-bit color image without affecting transparency part? - Rohit Nayak Newest 'ffmpeg' Questions - Stack Overflow

I am a new developer and currently developing a png compressor to compress png image file using next.js 14 app directory and I found the right command to do so ffmpeg -i input.png -c:v png -pix_fmt pal8 -vf "split[a][b];[a]alphaextract[am];[b]palettegen=stats_mode=diff[pl];[b][pl]alphamerge" output.png but i am unable to do so because I don't know how to convert that to ffmpeg.wash command. I am using node.js v20.11.0, ⓐffmpeg/ffmpeg version 0.12.6 and ⓐffmpeg/util 0.12.1", alone with ⓐffmpeg/coreⓐ version 0.12.2 which seems to work well. My code is as (...)
16:27
Cannot include ffmpeg.exe using auto-py-to-exe - YYY Newest 'ffmpeg' Questions - Stack Overflow

I'm trying to generate an exe for my PyQT application that uses ffmpeg using auto-py-to-exe. Within the application, there are calls to ffmpeg as an os command (like 'ffmpeg -i file ... output) . As I have ffmpeg installed on my machine and accessible from the Windows Path, when I run the app exe on my machine, I don't have any issue. However, when it's someone that doesn't have ffmpeg installed, he/she encounters an error like "'ffmpeg' is not recognized as an internal or external command, operal program or batch file" I don't (...) -- ,
12:40
How to create a box shadow effect when overlaying an image on a video using FFmpeg? [closed] - Kataklycm Newest 'ffmpeg' Questions - Stack Overflow

I'm working on a video project where I need to overlay an image on a background video. I've managed to achieve the basic overlay using the following FFmpeg command: ffmpeg -i background.mp4 -i image_video.mp4 -filter_complex "[0][1]overlay=(W-w)/2:(H-h)/2" -c:v libx264 -crf 23 -preset veryfast output.mp4 This command overlays the image on the background video, centered. However, I would like to add an effect similar to a CSS box shadow, where the overlaid image has a shadow that gradually fades out, giving it a sense of depth. I've tried various combinations (...) -- https://i.imgur.com/3uK79jP.png, https://i.imgur.com/KaIq7VI.png
09:05
HTTP Live video streaming using ffmpeg using NODEJS via Socket.IO - dintel Newest 'ffmpeg' Questions - Stack Overflow

I can't transmit the webcam to the server and to the website. Before, I was able to transmit the webcam (I don't remember how), but I only see frames continuously sent in cmd and don't see anything at localhost:3000 or 127.0.0.1:3000. I installed socket.io, ffmpeg and nodejs path And when i try this one, everything fine on udp, but to server and website is impossible. ffplay udp://127.0.0.1:23000 ffmpeg -f dshow -framerate 30 -video_size 640x480 -i video="Integrated Camera" -vcodec mpeg4 -f mpegts udp://127.0.0.1:23000 My server.js code: const (...)
04:40
Problem with xampp, some other program you use? [closed] - user13449797 Newest 'ffmpeg' Questions - Stack Overflow

I have been using xampp for several years, but recently I have become more and more bothered by using this program. sometimes there is a problem with starting MYSQL services. Sometimes solution with helps text I don't understand why this problem hasn't been solved yet and what exactly is the problem that sometimes it stops working on its own. Maybe you have any better alternatives to Windows 11?

3 avril

Newest 'ffmpeg' Questions - Stack Overflow http://stackoverflow.com/questions/tagged/ffmpeg

12:50
ProRes 4444 with alpha output file is HUGE, how to compress it with FFMPEG? [closed] - NoKey Newest 'ffmpeg' Questions - Stack Overflow

I am using FFMPEG to output a .mov file. It needs to be a .mov file with an alpha channel. ProRes 4444 supports this, this is the command I use (this is simplified but does show the high increase of file size): ffmpeg -y -i vid.mov -c:v prores_ks -profile:v 4444 -c:a pcm_s16le -pix_fmt yuva444p10le vid2.mov The output file shows what I want, but it is HUGE. I mean from a 10.8 MB .mov file, it creates a 340 MB output file. I tried reducing the file size with using the -crf command, but then I get this warning and the file size is unchanged: Codec AVOption crf (Select the (...)
18:28
Having issues with exporting video in FFMPEG [closed] - Jake Newest 'ffmpeg' Questions - Stack Overflow

I am developing an application that uses FFMPEG to take numerous videos and concatenate them into one file. The user has the ability to flip an individual video if they would like. From Landscape to portrait. The application works as planned and it produces one single file, with the orientation however the user set them. The problem is, when I take that file that FFMPEG generated and tray to convert or copy it using FFMPEG. It will create a video file of all of the video prior to the segment where the orientation has been flipped. The flipped video as well as all of the other videos (...)
08:51
ffmpeg command not working with VANC data [closed] - Parmesh Kumawat Newest 'ffmpeg' Questions - Stack Overflow

when i am running below ffmpeg command ffmpeg -i "udp://ip:port?localaddr=ip&sources=ip&overrun_nonfatal=1&buffer_size=4000000&fifo_size=1000000" -c copy -map 0 -vsync passthrough -copyts vanc_stream1.ts the bin_data for VANC is changing/not recognized saving as below output Input #0, mpegts, from 'vanc_stream_ffmpeg.ts': Duration: N/A, bitrate: N/A Program 1 Metadata: service_name : Service01 service_provider: FFmpeg Stream #0:0[0x100]: Data: bin_data ([6][0][0][0] / 0x0006) Stream #0:1[0x101]: Data: (...)
22:13
FFMPEG FDKAAC and Python - Eric Barker Newest 'ffmpeg' Questions - Stack Overflow

Been banging my head against the wall for days on this. I'm writing a python program to take a 48kHz WAV file, convert it to 44.1kHz and encode it to HE-AAC via FDKAAC. FDK cannot convert to sample rates, so I'm using FFMPEG as the wrapper and piping it through FDKAAC. In a perfect world, I'd make a custom build of FFMPEG with FKD, but I've run into loads of issues on our Windows Server 2019 machine trying to build out FFMPEG, so I'm using vanilla FFMPEG with FDK piped in. I can get the command to work perfectly from a command prompt: ffmpeg -progress (...)
18:59
FFMPEG Force Concat to skip corrupt files - Oli Shingfield Newest 'ffmpeg' Questions - Stack Overflow

I am currently using: ffmpeg -safe 0 -f concat -i clipstomerge.txt -vcodec copy -acodec copy mergedclips.mp4 This concats videos from a given directory listed in clipstomerge.txt. What I have noticed is that if there is a corrupted file the concat will fail. How can I force concat to to skip the corrupted files? Thanks in advance. EDIT: I have tried following this link: http://www.ffmpeg-archive.org/Force-concat-to-ignore-corrupt-files-td4664775.html But I couldn't understand how to fit it into my bat file. Any help (...) -- http://www.ffmpeg-archive.org/Force-concat-to-ignore-corrupt-files-td4664775.html
18:25
How to Convert u-law 8000 Hz Audio Files to OPUS in Python - user60108 Newest 'ffmpeg' Questions - Stack Overflow

I'm working on a Python project where I need to convert audio files from μ-law format with an 8000 Hz sampling rate to OPUS format. The challenge is to keep the original channels separated in the conversion process. Despite several attempts with different methods and libraries, I haven't succeeded yet. I'm looking for advice or a Python library that can efficiently handle this conversion. What I've Tried: 1- Using pydub to Load and Export Files: Attempted to load .au files with pydub and export them as OPUS. This approach resulted in ffmpeg related errors, (...)
12:52
FFmpeg saves an mp4 file every 10 seconds for the rtsp stream, and the progress bar for the video is incorrect [closed] - 谢康林 Newest 'ffmpeg' Questions - Stack Overflow

I had some problems when I was programming with the FFmpeg API I implemented this by changing the example remux.c. After writing the file header, read the packet. AVPacket wrote the trailer to the file for 10s, and then wrote the trailer to the av_write_trailer(ofmt_ctx). Then write the new file header again... The program can successfully save the mp4 file, but the progress bar of the first MP4 file is 10s, the second is 20s, the third is 30s.... But only the first 10 seconds of the video can be (...)
16:12
make ffmpeg chose Nvidia CUDA over Intel QSV (Windows 10 with two video adapters) - Bart Lederman Newest 'ffmpeg' Questions - Stack Overflow

I just set up a 'new' PC with built-in Intel video and an Nvida card: mostly to speed up video processing with ffmpeg and other programs. At first the built-in Intel was disabled, running only the Nvidia card. ffmpeg worked as expected, the CPU could be used for decoding and encoding. However: VirtualDub, a program I use frequently, has a problem with Nvidia cards (at least on Windows 10). The display gets screwed up, previews don't work, and all sorts of other problems occur. I tried all of the various discussion boards, and nobody has a good solution. (The problem is (...) -- https://github.com/FFmpeg/FFmpeg/commit/527a1e213167123d24d014bc0b956ef43d9d6542, https://docs.nvidia.com/video-technologies/video-codec-sdk/ffmpeg-with-nvidia-gpu/
08:19
Continuous RTMP Streaming with FFmpeg Without Restarting the Process for New Videos - 刘小佳 Newest 'ffmpeg' Questions - Stack Overflow

I'm facing a challenge with my workflow and would appreciate any guidance or solutions you might have. My business scenario involves a service that periodically generates new video files locally (e.g., 1.mp4, 2.mp4, ...). These files are then streamed to an RTMP server using FFmpeg, and clients pull the stream via HTTP-FLV for playback. My goal is to ensure continuous streaming between video files without restarting the FFmpeg process each time a new video is ready to be streamed. Restarting FFmpeg for each new file introduces a disconnect in the client playback, which I'm (...) -- https://trac.ffmpeg.org/wiki/Concatenate
03:01
Trying to choose first audio stream of specific language in ffmpeg using python - R41D Newest 'ffmpeg' Questions - Stack Overflow

I have .mkv files that some of them have more than 1 audio stream in the same language so i need to first map the audio streams with specific language and then use only first of them to output .mp4 file. So it would need two -map audio arguments which doesn't work in ffmpeg. I found out that i could execute ffmpeg mapping audio with that specific language and then pipe the output to another ffmpeg command that would take the first audio stream from the first ffmpeg command and do the rest of things (scaling, burning-in subtitles, encoding it to different format), but i'm (...)
02:16
ffmpeg audio out of sync with video stacking - s0mbre Newest 'ffmpeg' Questions - Stack Overflow

The problem When trying to do horizontal stacking of two videos in ffmpeg, the combined audio track loses sync with the video on the second input. As far as I've look it up, this problem is very common, not to say notorious with ffmpeg. I do hstack muxing like this: ffmpeg -i 1.mp4 -i 2.mp4 -filter_complex \\ "[0:v]scale=1280:-2,crop=w=640:h=720:x=0[v1]; \\ [1:v]scale=1280:-2,crop=w=640:h=720:x=0[v2]; \\ [v1][v2]hstack=shortest=1[v]; \\ [0:a][1:a]amix=duration=shortest[a]" \\ -map [v] -map [a] -c:v libx264 -c:a libmp3lame -r 30 -y stuff/out.mp4 (...) -- here, aresample=async=1, apad, adelay=0

2 avril

Newest 'ffmpeg' Questions - Stack Overflow http://stackoverflow.com/questions/tagged/ffmpeg

19:31
ffmpeg usage to encode a video to H264 codec format - goldenmean Newest 'ffmpeg' Questions - Stack Overflow

I have a *.mp4 video file(MPEG4 video codec) and I am trying to convert this to a H264 video codec format(raw h.264 format) using ffmpeg on Linux(Version - FFmpeg version SVN-r0.5.1-4:0.5.1-1ubuntu1, Copyright (c) 2000-2009 Fabrice Bellard,) using command line as shown below, ffmpeg -i input .mp4 output.h264 but I get an error saying - Unsupported codec for output stream #0.0 Then when i try this option: ffmpeg -i input .mp4 -formats h264 output.h264 it still does not work, and gives - Seems stream 0 (...)
18:33
Manim error: It's a sound problem that I haven't seen anywhere else - Nεo Pλατo Newest 'ffmpeg' Questions - Stack Overflow

I've been using Manim for about a month now, and with already existing impediments to my progress none has been more painful than the lack of sound when I got to this part of Theorem of Beethoven's tutorial. I've been struggling with it for three weeks and opened issues on GitHub and Reddit without any success. So the code looks like this: class AudioTest(Scene): def construct(self): group_dots=VGroup(*[Dot()for _ in range(3)]) group_dots.arrange_submobjects(RIGHT) for dot in group_dots: (...) -- this part of Theorem of Beethoven's tutorial
18:08
How to get the PCR and PTS values of a TS stream using FFMPEG? [closed] - tong berton Newest 'ffmpeg' Questions - Stack Overflow

I use ffmpeg to grab TS streams of PTS and DTS, I did not find a command to grab PCR. Can FFMPEG tools capture the PCR and PTS values in the realtime streaming TS? We need to use a tool to grab the PCR and PTS values of the real-time streaming TS for comparison.
17:47
Create multiple thumbnails using ffmpeg - Andrei Petrov Petrov Newest 'ffmpeg' Questions - Stack Overflow

Have a lot of videos .mp4 format and need to make thumbnails for them but I need make this thumbnails form 3 frames (for example 20% of video 50% and 70%) that will be croped and plased in order like this: https://imgur.com/a/Ypgl5A4 Is it possible to make thumbnails using some code? Maybe somebody can make it (sure not for free) Try ffmpeg exporting frames - but can only export full frames foreach ($file in Get-ChildItem *.mp4) # Get the duration of the video $duration = (ffmpeg -i $file.FullName 2>&1 | Select-String "Duration").ToString() -replace (...) -- https://imgur.com/a/Ypgl5A4
14:38
How to convert raw H264 frames to JPEG using C#? - Алексей Гладков Newest 'ffmpeg' Questions - Stack Overflow

I'm reading frames from RTSP stream, which produces raw h264 frames. I'm using RtspClientSharp library, so the code looks like this var uri = new Uri("rtsp://x.x.x.x/onvif/media?profile=Profile1"); var credentials = new NetworkCredential("xxxxx", "xxxxx"); var rtspClient = new RtspClient(new ConnectionParameters(uri, credentials)); rtspClient.FrameReceived += (sender, frame) => if (frame.Type is FrameType.Audio) return; Console.WriteLine($"Received frame of type frame.GetType().Name at frame.Timestamp"); ; await (...)
11:05
Repeated artifacts when decoding H.264 RTSP stream with FFmpeg - ttng_ Newest 'ffmpeg' Questions - Stack Overflow

I use FFmpeg to pipe a RTSP stream into my program for video processing. Some frames looks great but it glitches, then a good frame comes around, repeatedly as so. Here's my snippet of code used to do so: import ffmpeg import cv2 import numpy as np height = 320 width = 480 args = "rtsp_transport": "tcp", "avoid_negative_ts": "make_zero" out = ( ffmpeg .input('rtsp://localhost:8554/debug-stream', **args) .output('pipe:', format='rawvideo', pix_fmt='yuv420p', s='x'.format(width, (...) -- as so,
09:22
I can't configure OpenCV to use FFMPEG in python docker image - Jrneliodias Newest 'ffmpeg' Questions - Stack Overflow

I am attempting to create a Python Docker image to utilize OpenCV for processing video frame by frame, but I am encountering difficulties with the codec. Gives this erro: [ERROR:0ⓐ38.410] global cap_ffmpeg_impl.hpp:3130 open Could not find encoder for codec_id=27, error: Encoder not found [ERROR:0ⓐ38.410] global cap_ffmpeg_impl.hpp:3208 open VIDEOIO/FFMPEG: Failed to initialize VideoWriter my docker file: # Use a base image with the necessary dependencies FROM python:3.9-slim # Install ffmpeg and other dependencies RUN apt-get update && apt-get (...) -- Cisco
09:43
The While loop present in PowerShell code blocking the PowerShell GUI from being responsive - Baswaraj Newest 'ffmpeg' Questions - Stack Overflow

Add-Type -AssemblyName System.Windows.Forms $ffmpegPath = "C:\\ffmpeg\\bin\\ffmpeg.exe" $outputFilePrefix = "output" $recordDuration = 10 $global:ffmpegProcess = $null $global:recordingInProgress = $false function Start-Recording $global:recordingInProgress = $true $recordIndex = 1 while ($global:recordingInProgress) $outputFile = "$outputFilePrefix$recordIndex.mp4" $processStartInfo = New-Object System.Diagnostics.ProcessStartInfo $processStartInfo.FileName = $ffmpegPath $processStartInfo.Arguments = "-f gdigrab (...)
06:45
Getting "TypeError: must be real number, not NoneType" whenever trying to run write_videofile to a clip in moviepy - Sato Newest 'ffmpeg' Questions - Stack Overflow

Example code: from moviepy.editor import * clip = VideoFileClip('video.mp4') clip.write_videofile('video2.mp4', fps=30) After showing the following messages, showing that the video is being built and written, Moviepy - Building video video2.mp4. Moviepy - Writing video video2.mp4 The following error message occurs: Traceback (most recent call last): File "", line 1, in File "C:\\Users\\User\\Anaconda3\\lib\\site-packages\\decorator.py", line 232, in fun return caller(func, *(extras + args), **kw) File (...)
07:13
ffmpeg command not working with VANC Data - Parmesh Kumawat Newest 'ffmpeg' Questions - Stack Overflow

from the stream i am getting metadata as below output Input #0, mpegts, from 'stream_capture1.ts': Duration: 20:56:00.19, start: 21971.910678, bitrate: 5 kb/s Program 1 Metadata: service_name : CS11G service_provider: ABC Stream #0:1[0x70]: Video: hevc (Rext) ([36][0][0][0] / 0x0024), yuv422p10le(tv, progressive), 1920x540 [SAR 1:2 DAR 16:9], 59.94 fps, 59.94 tbr, 90k tbn, 59.94 tbc Stream #0:2[0x71]: Audio: aac (LC) ([15][0][0][0] / 0x000F), 48000 Hz, 5.1, fltp, 379 kb/s Stream #0:3[0x72]: Audio: aac (LC) ([15][0][0][0] / 0x000F), 48000 Hz, (...)
07:08
Unable to stream video file from MediaMTX media server to browser via WebRTC - thegreatjedi Newest 'ffmpeg' Questions - Stack Overflow

I took over a repository at work. It's a working demo comprising a web server which receives video and camera feeds from a media server (built from the rtsp-simple-server Docker image) via a RTSP relay server and streams the feeds to the client, all deployed via Docker Compose. I'm trying to switch over to use WebRTC instead. rtsp-simple-server has upgraded into MediaMTX since the time the demo was created 2 years ago. This is the relevant section of the updated Docker Compose configuration: media-server: image: bluenviron/mediamtx:latest-ffmpeg expose: (...) -- MediaMTX
03:31
I can't configure FFMPEG in python docker image - Jrneliodias Newest 'ffmpeg' Questions - Stack Overflow

I am attempting to create a Python Docker image to utilize OpenCV for processing video frame by frame, but I am encountering difficulties with the codec. Gives this erro: [ERROR:0ⓐ38.410] global cap_ffmpeg_impl.hpp:3130 open Could not find encoder for codec_id=27, error: Encoder not found [ERROR:0ⓐ38.410] global cap_ffmpeg_impl.hpp:3208 open VIDEOIO/FFMPEG: Failed to initialize VideoWriter my docker file: `# Use a base image with the necessary dependencies FROM python:3.9-slim Install ffmpeg and other dependencies RUN apt-get update && apt-get install (...) -- Cisco
01:27
How to stream mp4 file with fluent-ffmpeg? - user3184735 Newest 'ffmpeg' Questions - Stack Overflow

I am trying to stream a video file with fluent-ffmpeg. But i could't do it. Here is my code var filePath = null; filePath = "video.mp4"; var stat = fs.statSync(filePath); var range = req.headers.range; var parts = range.replace(/bytes=/, "").split("-"); var partialstart = parts[0]; var partialend = parts[1]; var start = parseInt(partialstart, 10); var end = partialend ? parseInt(partialend, 10) : total-1; var chunksize = (end-start)+1; var file = fs.createReadStream(filePath, start: start, end: (...)

1er avril

Newest 'ffmpeg' Questions - Stack Overflow http://stackoverflow.com/questions/tagged/ffmpeg

18:54
Transcription via OpenAi's whisper: AssertionError: incorrect audio shape - muratowski Newest 'ffmpeg' Questions - Stack Overflow

I'm trying to use OpenAI's open source Whisper library to transcribe audio files. Here is my script's source code: import whisper model = whisper.load_model("large-v2") # load the entire audio file audio = whisper.load_audio("/content/file.mp3") #When i write that code snippet here ==> audio = whisper.pad_or_trim(audio) the first 30 secs are converted and without any problem they are converted. # make log-Mel spectrogram and move to the same device as the model mel = (...)
16:29
ffmpeg объединить MP3 файлы и сделать между ними тишину или паузу [closed] - Макс Васильченко Newest 'ffmpeg' Questions - Stack Overflow

Подскажите пожалуйста как объединить несколько MP3 файлов в один файл. целый вечер ломаю голову не могу понять Как. мне нужно объединить такие файлы с паузой или тишиной и вывести их в один файл через ffmpeg windows bat or cmd file1.mp3|silence 3s|file2.mp3|silence 5s|file2.mp3|silence 5s|file2.mp3|silence 5s file2 несколько раз перепробовал практически всё что смог найти в Интернете и всё что мне подсказывали GPT и gemini
18:20
set ffprobe timeout for streaming protocols (srt,dash,hls,rtmp) - tester11 Newest 'ffmpeg' Questions - Stack Overflow

I am trying to write a test where ffprobe after network stream was disconnected will try to open it only for a specified number of seconds, then return with nothing, which would signal that the stream is no more. I tried to use timeout 5 key but ffprobe did not understand it. I will need such timeout for the 4 protocols as listed in the subject. Example ffprobe -show_format -show_streams rtmp://my_rtmp_link Edit: By trying every single kind of timeout keys listed in ffprobe help I found that this one, one only, accomplishes what I need (in (...)
16:25
libav: listing only audio- or video-capable demuxers - Jean-Michaël Celerier Newest 'ffmpeg' Questions - Stack Overflow

FFMPEG API, libav, provides the following function to iterate over the available demuxers: const AVInputFormat *av_demuxer_iterate(void **opaque); I would like to know which of these demuxers are relevant for audio (ex.: alsa, s16le), which are for animated images (ex.: gif), video (ex.: hevc, mjpeg), and which are combined audio/video/... containers (mov, mp4 etc.). But AVInputFormat (as of FFMPEG 6.1) does not seem to provide this information in any easily accessible way. Is there any way to get this information somewhere from the libav API (...)
14:56
"FFmpeg: Error not transitioning to the next song in Discord Bot's queue." - noober Newest 'ffmpeg' Questions - Stack Overflow

I have 3 modules, but I'm sure the error occurs within this module, and here is the entire code within that module: import asyncio import discord from discord import FFmpegOpusAudio, Embed import os async def handle_help(message): embed = discord.Embed( title="Danh sách lệnh cho Bé Mèo", description="Dưới đây là các lệnh mà chủ nhân có thể bắt Bé Mèo phục vụ:", color=discord.Color.blue() ) embed.add_field(name="!play", value="Phát một bài hát từ YouTube.", (...)
08:57
FFMPEG mixing .wav files volume control [closed] - JoonSeo Yang Newest 'ffmpeg' Questions - Stack Overflow

I am working on Java, using the ffmpeg library with command line processing to mix 2 .wav files into one .wav file, but I would like to know how to control the volume of each original file. My problem: i have 2 audio files (human voice BGM), but BGM is too loud, so i can barely hear human voice, i would like to -> volume down the BGM file, or volume up voice file Here is my partial code String ffmpegCommand = file_exe.getAbsolutePath() + String.format( " -i %s -i %s -filter_complex amix=inputs=2:duration=first:dropout_transition=3 %s", (...)
14:22
How to install ffmpeg on Google App Engine? - london_utku Newest 'ffmpeg' Questions - Stack Overflow

I intend to install ffmpeg and ffprobe to my Google App Engine flex environment, how can I do this with requirements.txt as a package ? I am currently using ffmpeg-python yet, this is only a wrapper. ffmpeg-python==0.2.0 ffprobe-python==1.0.3 Below is the error when I try to use ffmpeg-python wrapper, which is expected as there is no ffmpeg and ffprobe available : 2020-05-03 11:42:36 default[20200503t112932] [03/May/2020 11:42:36] ERROR [log.py:228] Internal Server Error: /capture_thumbnail/ 2020-05-03 11:42:36 default[20200503t112932] (...)
14:15
Extracting audio from video using fluent-ffmpeg - Idi Favour Newest 'ffmpeg' Questions - Stack Overflow

Im trying to extract the audio from a video, an error is occuring Error converting file: Error: ffmpeg exited with code 234: Error opening output file ./src/videos/output-audio.mp3. Error opening output files: Invalid argument I use this same directory for my video compression that runs before this one and it works. ffmpeg() .input(url) .audioChannels(0) .format("mp3") .output("./src/videos/output-audio.mp3") .on("error", (err) => console.error(`Error converting file: $err`)) .on("end", async () => console.log("audio transcripts"); (...)
12:57
java.io.IOException: Cannot run program "/data/user/0/com.voi.myapplication8/files/ffmpeg": error=13, Permission denied - Harsha Newest 'ffmpeg' Questions - Stack Overflow

java.io.IOException: Cannot run program "/data/user/0/com.voi.myapplication8/files/ffmpeg": error=13, Permission denied I am using this dependencies implementation 'com.writingminds:FFmpegAndroid:0.3.2' 2024-03-31 21:40:31.045 15937-16762 FFmpeg com.voi.myapplication8 E Exception while trying to run: [Ljava.lang.String;ⓐ71d4c0f java.io.IOException: Cannot run program "/data/user/0/com.voi.myapplication8/files/ffmpeg": error=13, Permission denied at java.lang.ProcessBuilder.start(ProcessBuilder.java:1050) at (...)
05:31
Compress and get thumbnails from .mp4 files using .net c# - Magi Newest 'ffmpeg' Questions - Stack Overflow

I was searching how we can compress mp4 file and generate thumbnails from that file, Fortunately, I found one solution "MediaToolKit" that worked perfectly for thumbnail generation but not works for compression. Currently, what I am doing, I have generated .bat file which contains commands of FFmpeg for example ffmpeg -i %1 -an -crf 25 -vf fps=fps=30,scale=640x480 %output.mp4 But it's not good stuff, I want to write a program in C# which will take video and compress it and generate thumbnails Does anyone have an idea about (...)
01:28
Batch script to convert, youtube-dl webm file to mp3 with ffmpeg - SneakyShrike Newest 'ffmpeg' Questions - Stack Overflow

I'm using youtube-dl to extract the best possible audio quality from youtube videos. However the best quality audio usually turns out to be the webm format, which isn't useful. I would like to write a batch script that converts the webm file to an mp3 with ffmpeg. I've already tried using this guide on reddit to do it, but it doesn't seem to work. It appears to create an empty mp3 file that displays an error when i try to play it and the meta data is also completly blank. Here is the batch script: for %%a in ("Downloaded\\*.*") do (...) -- youtube-dl, this guide,

31 mars

Newest 'ffmpeg' Questions - Stack Overflow http://stackoverflow.com/questions/tagged/ffmpeg

20:45
I need an azure product that executes my intensive ffmpeg command then dies, and i only get charged for the delta. Any Tips? - gamers hd Newest 'ffmpeg' Questions - Stack Overflow

I need an azure product where i can run my ffmpeg process on but i dont want to deal with acces overhead etc. But i need to be able to specify how strong the cpu and stuff should be. So consumption functions would be to weak & Premium functions are billed with a fixed rate so i cant use that either I tried first using a webapi but those are quite costly and because the commands are extremely sudden like in a couple seconds it can go to 100% cpu usage, so scalinng solutions even if i could afford it would be quite hard. I'm basicly looking for something that i can (...)
18:26
Converting MP3/MP4 to WAV in the Frontend Using ffmpegwasm with Next.js Results in Module Not Found Error - ryuma Newest 'ffmpeg' Questions - Stack Overflow

I'm attempting to use ffmpegwasm in a Next.js project to convert MP3 or MP4 files to WAV format directly in the frontend. However, I encounter a "Module not found" error during the process. I have made sure to use the latest version of Next.js. Below is the error message and the code snippet where the issue occurs. I'm seeking assistance to resolve this problem, as it has become quite troubling. error ./node_modules/ⓐffmpeg/ffmpeg/dist/esm/classes.js:104:27 Module not found 102 | if (!this.#worker) 103 | this.#worker = classWorkerURL ? > 104 | new (...)
18:26
Get remote MKV file metadata using nodejs - Ali Rahmani Newest 'ffmpeg' Questions - Stack Overflow

I need to extract the softsubs embeded into an mkv file hosted on a remote server using nodejs. All of the solutions I've found online so far are using local files, and others are either poorly documented or throwing unknown errors that I can't find online; That doesn't work for me. I need to extract subtitles from the remote file (like http://some-url.com/videos/video.mkv) without downloading the entire file to use it in my web-based (...)
17:10
Choose download resolution in m3u8 list with ffmpeg - Bruno Andrade Newest 'ffmpeg' Questions - Stack Overflow

I'm trying to download video from a m3u8 playlist using ffmpeg but I do not know how to choose the resolution to download. Currently the command is downloading the highest version the command I am using is: /home/user/bin/ffmpeg -user_agent "Mozilla/5.0 (Windows NT 10.0; WOW64; rv:49.0) Gecko/20100101 Firefox/49.0" -i "https://sitevideo.com/list.m3u8" -c copy "/home/file/video.ts" My list is this #EXTM3U #EXT-X-VERSION:3 #EXT-X-STREAM-INF:BANDWIDTH=400000,NAME="low" size1.m3u8 #EXT-X-STREAM-INF:BANDWIDTH=800000,NAME="med" size
05:15
After using ffmpeg to remove some streams in mkv file, it takes much longer to open the media file in potplayer in Windows - r ne Newest 'ffmpeg' Questions - Stack Overflow

It is well known that ffmpeg command line can be used to remove some streams in mkv or mp4 files, and I have no problem in doing so. ffmpeg -i input.mp4 -map 0 -map -0:a:3 -map -0:a:6 -c copy output.mp4 The only issue I meet sometimes is, the result media files in mkv or mp4 are much much slower to be opened by player. I cannot figure out the real reason and bypass it. Any hint or help on solving this issue? Thanks!

30 mars

Newest 'ffmpeg' Questions - Stack Overflow http://stackoverflow.com/questions/tagged/ffmpeg

20:32
ffmpeg: error while loading shared libraries: libopenh264.so.5 - ESZ Newest 'ffmpeg' Questions - Stack Overflow

I am using ffmpeg and getting this error ffmpeg: error while loading shared libraries: libopenh264.so.5: cannot open shared object file: No such file or directory I have already checked if the library exists and it does. I added it to /etc/ld.so.conf as mentioned in this previous question but it doesn't work.
13:05
Implementing trim and fade filters with ffmpeg - MP3 [closed] - thsk Newest 'ffmpeg' Questions - Stack Overflow

Endeavor to both TRIM and apply IN and OUT fades to a number of MP3 files using ffmpeg. Specifically trimming off a [400mS] length from the start, followed by a [400mS] fade up to full volume, then a [400mS] fade down at the conclusion of the recording. My obstacle is making the fade out function correctly. Have employed ffprobe to determine the total length of the file which is used in the $END variable. The following command appears to work correctly for the trim and the afade-in. ffmpeg -ss 00:00.4 -i "$FILENAME" -af "afade=t=in:st=0:d=0.4" -c:a libmp3lame "$NEWFILENAME" (...)
11:00
Overlaying frame number with ffmpeg [duplicate] - DMagma Newest 'ffmpeg' Questions - Stack Overflow

This should be simple but it is giving me fits and I haven't been able to find this specific problem. I am trying to overlay the frame number on a set of videos but my ffmpeg command string is ignoring any text overlay that has anything to do with a frame number. For example, these produce the correct overlay "-vf drawtext=fontfile='Arial.ttf': text='TEST': fontsize=30: fontcolor=yellowⓐ1.0:x=(w-text_w-15):y=15" "-vf drawtext=fontfile='Arial.ttf': text='%camera%': fontsize=30: fontcolor=yellowⓐ1.0:x=(w-text_w-15):y=15" "-vf (...)

29 mars

Newest 'ffmpeg' Questions - Stack Overflow http://stackoverflow.com/questions/tagged/ffmpeg

14:20
I get an error when republishing the image I shot with ros2 run ffmpeg [closed] - Seher Elbasan Büyük Newest 'ffmpeg' Questions - Stack Overflow

I get the following errors when republishing the image I took with ros2 run ffmpeg.; ros2 run image_transport republish ffmpeg in/ffmpeg:=image_raw/ffmpeg raw out:=image_raw/uncompressed --ros-args -p "ffmpeg_image_transport.map.hevc_rkmpp:=hevc"` terminate called after throwing an instance of 'image_transport::TransportLoadException' what(): Unable to load plugin for transport 'image_transport/ffmpeg_sub', error string: According to the loaded plugin descriptions the class image_transport/ffmpeg_sub with base class type (...)
20:54
Merge Azure mp4 blobs via API (Preferred Azure) - gamers hd Newest 'ffmpeg' Questions - Stack Overflow

I need to join multiple clips in to 1 video file. I tried doing it on my azure consumption serverless function but with bigger files its very slow and sometimes gives errors This is part of a bigger orchestrator functon where i create clips, merge them replace audio and upload it the finalized version to my blobstorage.
20:09
Merge (concat) all video file present in '43. DP (Part1)' and put it into '43. DP (Part1)' and give name merged (concat) file to folder name - Anu Mau Newest 'ffmpeg' Questions - Stack Overflow

I have parent folder alpha part 3 which contain child folder 43. DP (Part1), 44. DP (Part2), 45. DP (Part3). I want to merge (concat) all video file present in 43. DP (Part1) and put it into 43. DP (Part1) and give name merged (concat) file to folder name. And as it is do for all. alpha part 3 ├── 43. DP (Part1) │ ├── _43.1_Introduction to DP.mp4 │ ├── _43.2_What is DP_ (Definition).mp4 │ ├── _43.3_Ways of DP.mp4 │ ├── _43.4_7 Important Concepts.mp4 │ ├── _43.5_Climbing Stairs (Recursion).mp4 │ ├── _43.6_Climbing Stairs (Memoization DP).mp4 │ ├── _43.7_Climbing (...)
16:06
Probably memory leakage on ffmpeg when doing a multiple trims and concat filter. What's the workaround? - haubna Newest 'ffmpeg' Questions - Stack Overflow

Example: ffmpeg.exe -i "input1.mp4" -filter_complex "[0:v]trim=start=3624.005:end=3630.005,setpts=PTS-STARTPTS[vidFinal];" -map [vidFinal] output.mp4 ffmpeg just reads through the entire video file just to cut 6 seconds out of the video. Is there a way to avoid this with -filter_complex? Because I have multiple trims of multiple large video files and reading through a couple of 6 hour video files when needing only 6 seconds parts is too (...)
13:00
Difference between DirectShowSource() and FFmpegSource2() in AviSynth - MarianD Newest 'ffmpeg' Questions - Stack Overflow

For non .avi A/V sources (as .mp3, .mp4, etc.) there are (at least) 2 possibilities for reading those media files in AviSynth (in Windows): The built-in media filter DirectShowSource(), using Microsoft's DirectShow media architecture. The AviSynth Plugin FFmpegSource2() alias FFMS2() using FFmpeg and nothing else. What are advantages and disadvantages of them? Which is more reliable, frame / sample accurate, etc.? (...) -- Microsoft's DirectShow, FFMS2(), FFmpeg
11:41
Why does fluent-ffmpeg only work when it throws the error Output stream closed - volume one Newest 'ffmpeg' Questions - Stack Overflow

I am using fluent-ffmpeg to process a video file (and then upload that to Amazon S3). The code is very straightforward but it only works if: pipe option end: true is set in .output() which has a side-effect that causes the following console log output Processing: 19.261847354642416% done Processing: 32.365144874807335% done Processing: 48.80978326261429% done Processing: 78.35771917058617% Processing: 91.49377493455148% done Processing: 99.91264359125745% done An error occurred: Output stream closed Despite that error, it seems the file is (...) -- fluent-ffmpeg
11:15
libav audio latency / cannot set audio_buffer_size - Heiner Newest 'ffmpeg' Questions - Stack Overflow

For an audio/video capturing tool we open live capture devices with the following code: AVFormatContext* ic = nullptr; const AVInputFormat *iformat = av_find_input_format("dshow"); AVDictionary *options = nullptr; av_dict_set(&options, "audio_buffer_size", "50", 0); av_dict_set(&options, "framerate", "30", 0); av_dict_set(&options, "video_size", "640x360", 0); av_dict_set(&options, "sample_rate", "48000", 0); auto err = avformat_open_input(&ic, "video=Integrated Camera:audio=Microphone Array", iformat, &options); Audio (...) -- documentation
10:52
libav - undefined reference to 'av_frame_alloc' and more - IIIIIIIIIIIIIIIIIIIIII Newest 'ffmpeg' Questions - Stack Overflow

I am trying to compile this tutorial from the libav doc: link I changed nothing on the code! But when I compile it with: gcc test.c -lavformat -lswscale -lavdevice -lavformat -lavcodec -lavutil -lpthread -lm -o example I get these errors: undefined reference to `check_sample_fmt' undefined reference to `select_sample_rate' undefined reference to `select_channel_layout' undefined reference to `av_frame_alloc' undefined reference to `av_frame_free' Searching Dr.google I read that it maybe has something to do with (...) -- link
08:18
An error occurred after encoding with h264_nvenc - jiang hang Newest 'ffmpeg' Questions - Stack Overflow

1373x768 yuv420p picture The ffmpeg api(avcodec_send_frame, avcodec_receive_packet) will write the avpacket-data data to the file after the encoding is successful, and then decode t using ffmpeg command line, save AvPacket::data, the resulting picture is not normal Directly use ffmpeg command line encoding, and then decode, the resulting picture is normal decodec command： ffmpeg -i out.h264 -ss 0 -frames:v 1 output_frame.png ecodec command： ffmpeg -s:v 1376x768 -pix_fmt yuv420p -i input.yuv -c:v h264_nvenc out.h264 exception picture: enter image (...) -- enter image description here
05:25
ffmpeg can't extract a frame near the end of the video - Rob Allsopp Newest 'ffmpeg' Questions - Stack Overflow

From what I gather, using ffmpeg to fully decode a video should give me an accurate duration. If I use: ffmpeg -i my_vid.mov -f null - for a particular video, I get an output of: ... frame= 901 fps=0.0 q=-0.0 Lsize=N/A time=00:00:30.52 bitrate=N/A speed= 247x ... But when I run the following command to extract a frame near the end, it fails: ffmpeg -i my_vid.mov -ss 00:00:30.450 -q:v 2 -vframes 1 test_frame.jpg outputs: Output file is empty, nothing was encoded (check -ss / -t / -frames parameters if used) Backing up to (...)
05:00
How to write H264 raw stream into mp4 using ffmpeg directly - Yelsin Newest 'ffmpeg' Questions - Stack Overflow

I want to wrap the H264 Nalus(x264 encoded) into mp4 using ffmpeg(SDK 2.1), but the output mp4 file could not play. I don't know how to set the pts and dts. Here's my code, using the code from Raw H264 frames in mpegts container using libavcodec and muxing.c from www.ffmpeg.org. My H264 stream has no B-Frame, every nalu starts with 00 00 00 01,the stream begins with sps pps then the h264 data. #include "stdafx.h" #include #include #include "Stream2Mp4.h" #include #include #include #include #include #include (...)
03:18
Incorrect values for song length (duration) in Mp3tag after ffmpeg FLAC to MP3 conversion - Clueless Newest 'ffmpeg' Questions - Stack Overflow

The problem As per this post, I use the following command to convert a flac file to mp3 while keeping all metadata: ffmpeg -i input.flac -ab 320k -map_metadata 0 -id3v2_version 3 output.mp3 When inspecting the converted mp3 file by right-clicking it, going to properties and then details, everything looks in order. The value for "Length" is correct. When inspecting the converted mp3 file with Mp3tag, the value for "Length" is different. From my testing, the "Length" value is consistently about 28% of what it is supposed to be. Normally, this (...) -- , , , https://cloudconvert.com/flac-to-mp3, here's the link
01:36
How to use the 'shortest' argument with ffmpeg-python - MyNameIsTrez Newest 'ffmpeg' Questions - Stack Overflow

I'm using ffmpeg-python for my first time. I'm trying to use the shortest=1 argument in ffmpeg.output(), but my program keeps giving me errors when I use it. I want to replace the audio from foo.mp4 with the audio from bar.webm, while keeping the visuals of foo.mp4. I got this working, but the problem is that ffmpeg.concat by default keeps playing the audio from bar.webm while the visuals from foo.mp4 have stopped playing. According to this FFmpeg docs page, this is the intended behaviour: "The concat filter will use the duration of the longest stream in each (...) -- ffmpeg-python, this FFmpeg docs page
01:18
NodeJS stream MKV as MP4 video - SirMissAlot Newest 'ffmpeg' Questions - Stack Overflow

I'm trying to stream MKV video as MP4 on the fly with out saving the converted file first I've tried without conversion: public async streamById(req: Request, res: Response) const movieId = req.params.id; const movie = await MovieModel.findById(movieId); if (!movie) return res.status(404).send( message: 'Movie not found' ); const filePath = movie.path; const stat = fs.statSync(filePath); const fileSize = stat.size; const range = req.headers.range; if (range) const parts = (...)
00:22
ffmpeg - excerpt from a large video file, preserving its additional streams - BabaG Newest 'ffmpeg' Questions - Stack Overflow

I have a video file that has a stereo audio track and two additional stereo streams of audio. I'll include the mediainfo details at the end. The closest I've come to being able to excerpt a portion of this large file, while keeping all of the streams, is this: ffmpeg -i output.mov -ss 1200 -map 0 -c copy -to 00:21:00 -map 0:1 -c:a copy -map 0:2 -c:a copy output_excerpt.mov This seems to give me a bunch of extra streams, though. What's a correct command to do this? I was expecting four streams, one video, a second for the video's main audio, then two (...)

28 mars

Newest 'ffmpeg' Questions - Stack Overflow http://stackoverflow.com/questions/tagged/ffmpeg

18:31
ffmpeg video compression / specific file size [closed] - justin.esders Newest 'ffmpeg' Questions - Stack Overflow

Currently I have 80mb movies that I want to use ffmpeg to convert down to say about 10mb or 15mb. I know there will be a quality loss but they will need to have sound. Is there a way to either specify a file size or higher compression than what I have done previously ffmpeg -i movie.mp4 -b 2255k -s 1280x720 movie.hd.ogv They are currently about 25mb a piece
15:25
ffmpeg, how to cut to exactly at the start and end time? [closed] - Wayne Julian Newest 'ffmpeg' Questions - Stack Overflow

According to this article you can only cut the time, but not specify when to cut from the original video. So the end time will always be wrong. You need to calculate each time on the timeline when your video will end. e.g. -ss 01:30:40 -to 03:03:05 will cut your video in the wrong order, because it starting the calculation not from the 00:00:00 of the video, but from the -ss 01:30:40 Is there a workaround for this? example command: ffmpeg -ss 00:14:15 -an -i "2022-05-30.mp4" -to 01:30:40 -crf 23 -c:v libx264 PART1.mp4 I will lose 14:15 minutes here, it is clearly a (...) -- this article
15:10
How to convert High bitrate MP3 to lower rate using FFmpeg - user4571931 Newest 'ffmpeg' Questions - Stack Overflow

We want to convert 320kbps mp3 file to 128kbps mp3 so currently we are using below ffmpeg command but its not working. ffmpeg -i input.mp3 -codec:a libmp3lame -qscale:a 5 output.mp3 Result:-the output bitrate same as input mp3. And we are following the FFmpeg Encoding guideline for that here is the link :- https://trac.ffmpeg.org/wiki/Encode/MP3 so please suggest any solution. -- https://trac.ffmpeg.org/wiki/Encode/MP3
14:52
I am converting images to video using ffmpeg in koltin but i am getting error - Mohith_karthikeya Newest 'ffmpeg' Questions - Stack Overflow

i implement ffmpeg by using this gitbub by this reference :5 https://github.com/tanersener/mobile-ffmpeg in koltin my code is : class BurstModeToVideo( private val context: Context, private val onVideoConverted: (File) -> Unit ) private val vibeDirectory = File(context.getExternalFilesDir(Environment.DIRECTORY_PICTURES), "vibes") private val outputDirectory = context.getExternalFilesDir(Environment.DIRECTORY_MOVIES) fun convertBitmapToJpeg(vibes: List) if (!vibeDirectory.exists()) vibeDirectory.mkdirs() (...)
08:29
AWS Lambda failed to resolve hostname in child_process spawn - warly Newest 'ffmpeg' Questions - Stack Overflow

i'm trying to get ffmpeg working in AWS Lambda reading from and writing to S3. I crawled through dozens of aws documentations, stackoverflow questions and blog posts. All do it slightly different, but in the end none of them worked for me. So I hope to find help here :) I sticked to the tutorial from InPlainEnglish: https://plainenglish.io/community/automated-video-processing-with-aws-lambda-and-ffmpeg-2834b7 The ffprobe command does work, so ffmpeg is callable. But when calling ffmpeg within a child_process.spawn command i get the error Failed to resolve hostname (...) -- https://plainenglish.io/community/automated-video-processing-with-aws-lambda-and-ffmpeg-2834b7

27 mars

Newest 'ffmpeg' Questions - Stack Overflow http://stackoverflow.com/questions/tagged/ffmpeg

22:35
FFMPEG fast quality video encoding without quality loss & less storage occupancy (maybe using GPU) - Diwash Mainali Newest 'ffmpeg' Questions - Stack Overflow

I Have written a go code but it is slow and the video compression rate is also not that impressive. I am new to FFMPEG and my entire project depends on FFMPEG. I have tried different video codecs like vp9, h264, h265, NVENC, AV1, etc. All of them were too slow (maybe I am not good enough to optimize it). My project is based on Go and the current codec that I am using is libx264. Can anyone help me optimize the video encoding part of my project. Libx264: func encodeVideo(fileName, bitrate, crf, preset, resolution string) *exec.Cmd return (...)
18:45
Adding slides of a pdf presentation to the audio file of the same presentation with ffmpeg - revher Newest 'ffmpeg' Questions - Stack Overflow

I want to add slides of a pdf presentation to the audio file of the same presentation with ffmpeg (or whatever). I split the pdf presentations using pdftoppm into numbered png images and tried to use ffmpeg to sync the audio file with the images. But I am wondering if the output file could be smaller. Example, the following command will split file 'foo.pdf' into file 'output-01.png', 'output-02.png' etc: $ pdftoppm foo.pdf -png output Then I listen to the audio file 'foo-audio.mp3' and noted the end of each slide in minutes (...) -- a the ffmpeg mailing list
18:31
Error opening input files: Invalid data found when processing input - Master's Time Newest 'ffmpeg' Questions - Stack Overflow

I am creating disnake music bot. The error is: [in#0 ⓐ 00000233f8d71500] Error opening input: Invalid data found when processing input Error opening input file https://www.youtube.com/watch?v=duDUqBtxwXk. Error opening input files: Invalid data found when processing input Here is part of my code: import disnake import asyncio from yt_dlp import YoutubeDL import ffmpeg YTDL_OPTIONS = 'format': 'bestaudio', 'noplaylist': 'False', 'simulate':'True', (...)
18:10
How can I upscale a stereo signal using PLII on a VM - andersmi Newest 'ffmpeg' Questions - Stack Overflow

I want to upscale a stereo signal with PLII from an input on a VM and sent it to an output after the upscale. I am thinking of installing Voicemeeter/Virtual Audio Cable or something like that to get an input on the VM. I will then be able to use Dante Via on the VM host to sent the audio to the VM input and receive it again from the VM output on Dante Via then send it to my amplifier. The solution needs to be able to initialize itself after reboot. I have looked into different solutions the most promissing seems to be FFDShow and FFMpeg, but there is not much (...)
19:05
Batch reduce bitrate and size of mp3 audio files with ffmpeg - Wes Modes Newest 'ffmpeg' Questions - Stack Overflow

I was looking for a way to batch reduce mp3 bitrate on my sizable collection of mp3 files. It was surprising difficult given that this must be a super common thing to want to do. In fact, there are dozens, maybe hundreds, of posts from people asking how to do it, and dozens of utilities available for varying amounts of money that claim to do just that. Looking around and trying some of the free software, I was surprised that none made the task of batch converting/adjustment easy. If I wanted to convert a single file, I'm told this is a decent way to do (...)
12:20
Can't initialize "h264_mediacodec" for hw accelerated decoding, FFMPEG, Android - Ramil Galin Newest 'ffmpeg' Questions - Stack Overflow

I am trying to create hw accelerated decoding on Android through JNI and following this example but, unfortunately, avcodec_get_hw_config returns nullptr. I have also tried using avcodec_find_decoder_by_name("h264_mediacodec"), also returns nullptr. I built ffmpeg (version 4.4) using this script with the flags: --enable-jni \\ --enable-mediacodec \\ --enable-decoder=h264_mediacodec \\ --enable-hwaccel=h264_mediacodec \\ When configuring build I saw in logs WARNING: Option --enable-hwaccel=h264_mediacodec did not match anything, which is actually strange. (...) -- example, this
11:52
fluent ffmpeg how to take a screenshot from a stream and save it onto a stream - Rodrigo Newest 'ffmpeg' Questions - Stack Overflow

I have the following code ffmpeg(readStream) .setFfmpegPath(ffmpegPath) .outputOptions('-vframes 1') .outputOptions('-f image2pipe') .outputOptions('-vcodec png') .writeToStream(writeStream) Which runs fine without any errors, but it does not store the screenshot in the output stream. What I'm doing wrong? It looks like I'm now waiting for the process to finish, but if so, how can I (...)
09:49
Ffmpeg converting video from DVR - O.starshina Newest 'ffmpeg' Questions - Stack Overflow

Tell me how to split and convert video recorded from a DVR that has recording from several cameras ch1, ch2, ch3 and split the video into several video files, from each camera into its own video file? I didn't find the information I needed in the instructions
05:29
How to use FFmpeg from a location where access is denied？ [closed] - quite a beginner Newest 'ffmpeg' Questions - Stack Overflow

I tried to convert m3u8 file to ts file with FFmpeg, but my ip address was being rejected and I couldn't. Is there any way to do this? I tried converting with glitch using glitch console and then downloading the entire repository, but I could only download up to 180MB.It was certainly a reliable method, but it failed because it could only use up to 180MB.
11:19
how to not remove transparency using negate option on png files ffmpeg - Reilbas Newest 'ffmpeg' Questions - Stack Overflow

I'm new to FFMPEG. To make it simple, I've created a program that applies a negative filter to small images in png format. For some of the images, everything is fine and the transparency is maintained... But for others, FFMPEG converted the transparency to either black or white pixels. I'm just using the command: ffmpeg -y -i input.png -vf negate output.png I downloaded the latest binaries for windows from https://www.gyan.dev/ffmpeg/builds/ (...) -- https://www.gyan.dev/ffmpeg/builds/
08:32
controlling the speed of the hls play list, generated by ffmpeg - tamirg Newest 'ffmpeg' Questions - Stack Overflow

I have a ffmpeg process which the input is an rtsp stream, and the output is a m3u8 play list. when i simply watches the rtsp input stream, the play speed is correct and everything works fine. but when i play the created HLS playlist, it seems to play in a much faster speed. The way i create the ffmpeg process: _SEGMENT_FILE_FORMAT = 'output%d.ts' output_dir_path = "C:\\\\Tempdir" source = ffmpeg.input( 'rtsp://myrtspserveraddress', rtsp_transport='tcp', fflags='nobuffer', (...)
05:02
How to change AVFilterContext parameters? - John Newest 'ffmpeg' Questions - Stack Overflow

After generate AVFilterContext *,how can i change parameters? Such as "drawbox=x=%d:y=%d:width=%d:height=%d:color=%s", I used av_opt_set(filter_ctx->priv, "x", std::to_string(x).c_str(), 0); But it didn't take effect. What should i do for move the rect? int FilterUtils::initFilter(AVCodecContext *codecContext, const char *filter_str) // closeFilter(); int ret = -1; char args[512]; filter_graph = avfilter_graph_alloc(); if (!filter_graph) ret = AVERROR(ENOMEM); return -1; buffersrc = (...)
04:35
Cutting multimedia files based on start and end time using ffmpeg - Kalaiyarasan Newest 'ffmpeg' Questions - Stack Overflow

I tried to cut the video using the start and end time of the video by using the following command: ffmpeg -ss 00:00:03 -t 00:00:08 -i movie.mp4 -acodec copy -vcodec copy -async 1 cut.mp4 By using the above command I want to cut the video from 00:00:03 to 00:00:08. But it is not cutting the video between those times instead of that it is cutting the video with first 11 seconds.
04:17
Change keyframe interval - Samarth Misra Newest 'ffmpeg' Questions - Stack Overflow

How do I set the keyframe interval to 5 seconds using FFmpeg?

26 mars

Newest 'ffmpeg' Questions - Stack Overflow http://stackoverflow.com/questions/tagged/ffmpeg

22:17
can ffmpeg use actual frame number in stream instead of sequentially added image numbers - Wang Newest 'ffmpeg' Questions - Stack Overflow

ffmpeg -i test.mp4 -vf select="eq(pict_type\\,I)" %d.png above code create file name incremental by 1, like: 1.png 2.png 3.png ... but I want the actual frame number in the source stream: 1.png 26.png 51.png ... there is very old thread asking the same thing. But I wonder is there a solution right now? -- old thread
21:43
Compile FFmpeg with libfdk_aac - Toydor Newest 'ffmpeg' Questions - Stack Overflow

I been reading on how to convert mp3 to m4a, and found that I must compile FFmpeg if I'll use the AAC encoder, libfdk_aac. But reading FFmpeg guide on how to compile FFmpeg with libfdk_aac makes no sense for a beginner like me. To use libfdk_aac the encoding guide says: Requires ffmpeg to be configured with --enable-libfdk_aac --enable-nonfree. Where do I put those flags? Do I put it here somewhere?: cd ~/ffmpeg_sources git clone --depth 1 git://github.com/mstorsjo/fdk-aac.git cd (...) -- http://trac.ffmpeg.org/wiki/CompilationGuide/Ubuntu
21:07
ffmpeg pipe out to stdout on windows - JaSHin Newest 'ffmpeg' Questions - Stack Overflow

Hello I need to pipe output from ffmpeg to another program. It's works on my macOs with command: ffmpeg -i C0333.MP4 -start_number 0 -f rawvideo -pix_fmt rgb48le pipe: | rgb2dng -i - -n 0 -o 'export/test-####.dng' I have ported rgb2dng from Unix systems to Windows. But same command doesn't work. rgb2dng used stdin to read pipe: if (strcmp(ifn,"-")==0) ifo = stdin; else ifo = fopen(ifn, "rb"); (...)
18:47
ffmpeg burned-in subtitles render in the wrong font - dv151 Newest 'ffmpeg' Questions - Stack Overflow

Trying to burn in subtitles to a video in FFMPEG in GothamProBold font. No matter what I do it keeps reverting to Helvetica. From the console, I see that FFMPEG seems to load the font without error. Then switches over to font provider "coretext" [Parsed_subtitles_0 ⓐ 0x7fed054048c0] Loading font file '/Projects/Fonts/GothaProBol.otf' [Parsed_subtitles_0 ⓐ 0x7fed054048c0] Using font provider coretext [Parsed_subtitles_0 ⓐ 0x7fed054048c0] fontselect: (GothaProBol.otf, 400, 0) -> /System/Library/Fonts/Helvetica.ttc, -1, Helvetica It seems like it has my font (...)
10:24
FFMPEG - await ffmpeg.load() - overlay.ts Uncaught ReferenceError: document is not defined - devVue123 Newest 'ffmpeg' Questions - Stack Overflow

I use FFMPEG plugin with Vue3 and Vite. My code: import FFmpeg from 'ⓐffmpeg/ffmpeg' import fetchFile, toBlobURL from 'ⓐffmpeg/util' import onMounted from "vue"; // const baseURL = 'https://unpkg.com/ⓐffmpeg/coreⓐ0.12.6/dist/esm' // doc - vite const baseURL = 'https://unpkg.com/ⓐffmpeg/core-mtⓐ0.12.6/dist/esm' // example const ffmpeg = new FFmpeg(); onMounted(() => initializeFfmpeg() ) const initializeFfmpeg = async () => await ffmpeg.load() but FFMPEG is (...) -- ,
07:43
Adding ffmpeg path on remote server not working [closed] - Vatsal A Mehta Newest 'ffmpeg' Questions - Stack Overflow

I am working on mp3 audio processing and need the ffmpeg library for my code to work. In my local setup I have installed ffmpeg and the code is working fine. But I have to make changes to the codebase on a remote server where ffmpeg isn't installed. I tried adding the installation folders of ffmpeg and then editing the PATH environment variable to add the ffmpeg path. But I get an error message that says: FileNotFoundError: [Errno 2] No such file or directory: 'ffprobe'. The ffmpeg installed files in my local setup are: Now I copied this and added to the (...)
04:29
How to use ffmpeg to add a drop shadow? - mrstudy Newest 'ffmpeg' Questions - Stack Overflow

I'm trying to add a drop shadow to an overlay video using ffmpeg, but haven't had any luck. I was trying using something similar to the command in this post, but I haven't been able to understand it/get it working. Here is an example of what I'm trying to do. It's not super easy to tell from my screenshot, but I want a shadow behind the overlay video similar to box-shadow from css. Any help is appreciated! -- Here is an example of what I'm trying to do., box-shadow

25 mars

Newest 'ffmpeg' Questions - Stack Overflow http://stackoverflow.com/questions/tagged/ffmpeg

21:21
Create a video from images where the video size is not much larger than the sum of all images - Stefan Falk Newest 'ffmpeg' Questions - Stack Overflow

What I am describing is basically a slideshow. I was hoping to be able to create a video which consistis of, for example, three different frames 1, 2 and 3 but each of them gets shown for an hour. Let's say we have a file inputs.txt file 'img1.jpg' duration 3600 file 'img2.jpg' duration 3600 file 'img3.jpg' duration 3600 I would like to concatenate these images like so: ffmpeg -f concat -i inputs.txt output.mp4 -y However, this is already giving me the warning of More than 1000 frames (...)
21:20
Python extract wav from video file - xolodec Newest 'ffmpeg' Questions - Stack Overflow

Related: How to extract audio from a video file using python? Extract audio from video as wav How to rip the audio from a video? My question is how could I extract wav audio track from video file, say video.avi? I read many articles and everywhere people suggest to use (from Python) ffmpeg as a subprocess (because there are no reliable python bindings to ffmpeg - the only hope was PyFFmpeg but i found it is unmaintaned now). I don't know if it is right solution and i am looking for good one. I looked to gstreamer and found it nice but (...)
20:28
a little bit slow when playback h264 raw video with ffmpeg - lucky1928 Newest 'ffmpeg' Questions - Stack Overflow

I have running scrcpy to record a h264 raw video from android device, but when I playback it in linux with ffmpeg, the video looks like a little bit slow. The video encoder in android device should be variable fps since video frame update actually depends on screen content change or not. Does h264 raw video has frame rate information or only PTS values,, if playback use PTS, it should be the same speed as original frames. What's the reason maybe cause such slow playback (...)
16:28
attempting to save FuncAnimation changes the animation - pibion Newest 'ffmpeg' Questions - Stack Overflow

I am attempting to create and save an animation of a time-varying vector field using matplotlib's FuncAnimation. When I run the animation without attempting to save it, it updates smoothly as expected. However, when I try to save the animation, the vectors increase in length and the animation only appears to update a few times. I've been able to record the screen to get a video file, but I'd like to understand how to save the animation to a video in python. Here is the code to create the vector field animation. I ran this in a local jupyter notebook using python 3.9.12 (...)
12:56
Xamarin Mac FFmpeg launch path not accessible - Tecnopresley Newest 'ffmpeg' Questions - Stack Overflow

I have a Xamarin Forms project with Mac support and I am trying to implement FFmpeg, so I have downloaded the Static build from its official page and added it as in the resources folder of the Mac project with the build action in Content, then I have created a service that will basically remove the audio from a video that I indicate in a path with a FFmpeg command, to do the service I have based on the following answer and I have adapted it to C #: https://stackoverflow.com/a/37422688/8496520 The problem is that when I try to execute the command I get the following (...)
06:00
How to record video and audio from webcam using ffmpeg? - Babu Newest 'ffmpeg' Questions - Stack Overflow

I want to record video as well as audio from webcam using ffmpeg, I have used the following codes to know what devices are available: ffmpeg -list_devices true -f dshow -i dummy And got the result: ffmpeg version N-54082-g96b33dd Copyright (c) 2000-2013 the FFmpeg developers built on Jun 17 2013 02:05:16 with gcc 4.7.3 (GCC) configuration: --enable-gpl --enable-version3 --disable-w32threads --enable-av isynth --enable-bzlib --enable-fontconfig --enable-frei0r --enable-gnutls --enab le-iconv --enable-libass --enable-libbluray (...)

24 mars

Newest 'ffmpeg' Questions - Stack Overflow http://stackoverflow.com/questions/tagged/ffmpeg

17:58
Using pydub on AWS lambda - Bailey Newest 'ffmpeg' Questions - Stack Overflow

Ok, so I have the same problem as here: Using pydub and AWS Lambda but thought it would be cleaner to re-ask here as I have made some progress (I think?). I followed the instructions here: https://medium.com/faun/how-to-use-aws-lambda-layers-f4fe6624aff1 like this: I created a lambda_function.py file: from python.pydub import AudioSegment print('Loading function') def lambda_handler(event, context): print(event) sound = AudioSegment.from_mp3("https://s3-eu-west-1.amazonaws.com/audio.mp3") etc... (...) -- https://medium.com/faun/how-to-use-aws-lambda-layers-f4fe6624aff1
16:56
How to extract video embedded subtitle from a video URL and show in a text widget in flutter? - badshah badmas Newest 'ffmpeg' Questions - Stack Overflow

I'm using flutter VLC player to play videos in my flutter app. I want to change the subtitle size dynamically in my video. But Flutter VLC player did not provide the function to change subtitle size dynamically. So I would like to extract the subtitle from the video and show it in a text widget instead of VLC player's subtitle. Can someone help me to extract the subtitle from the video URL? Or any other method to solve this issue? I have tried to extract subtitles using ffmpegkit . await FFmpegKit.executeAsync('-i $url -map 0:s:0 -codec:s srt (...) -- flutter VLC player, ffmpegkit
15:30
Jump to complex filter trim? - haubna Newest 'ffmpeg' Questions - Stack Overflow

Example: ffmpeg.exe -i "input1.mp4" -filter_complex "[0:v]trim=start=3624.005:end=3630.005,setpts=PTS-STARTPTS[vidFinal];" -map [vidFinal] output.mp4 ffmpeg just reads through the entire video file just to cut 6 seconds out of the video. Is there a way to avoid this with -filter_complex? Because I have multiple trims of multiple large video files and reading through a couple of 6 hour video files when needing only 6 seconds parts is too (...)
13:38
'ffmpeg' is not recognized as an internal or external command in nodejs node-ffmpeg - Wai Yan Hein Newest 'ffmpeg' Questions - Stack Overflow

I am developing a Node.js application. First of all, I am just a beginner when it comes to Node. What I am doing in my application now is that I am trying to create the thumbnail JPEG file for my mp4 file. I have already tried many possible solutions. Now I am using this one - https://github.com/damianociarla/node-ffmpeg. I think this is the potential solution among all. I am getting the error when I generate the JPEG thumbnail of the video file. Here is what I have done so far. I installed the package running this command npm install ffmpeg --save Then I try to (...) -- https://github.com/damianociarla/node-ffmpeg,
03:30
ffmpeg udp multicast encoding not working - hhs_89 Newest 'ffmpeg' Questions - Stack Overflow

I am trying to use ffmpeg to receive audio data from mic via UDP and it to http server. The audio data has following properties: sample rate = 16000 bit depth = 16 buffer size = 1280 When I execute ffmpeg command with UDP multicast, it gives me error "Invalid data found when processing input". The command I am using is: -i udp://239.10.10.100:4546 buffer_size=1280 bitrate=16000 icecast://ip:port/mountname However, I can save the audio data to a local file by using following command: '-re -ar 16000 -ac 1 -f s16le -i udp://239.10.10.100:4546 (...)

23 mars

Newest 'ffmpeg' Questions - Stack Overflow http://stackoverflow.com/questions/tagged/ffmpeg

18:14
Why does my ffmpeg command fails from python subprocess? [closed] - haggi krey Newest 'ffmpeg' Questions - Stack Overflow

I want to concat two movies with ffmpeg. In the shell I can execute this: \\\\programs\\2d\\ffmpeg\\inst\\ffmpeg.bat -y -i "concat:C:/daten/movieA.ts1|C:/daten/movieB.ts2" -c copy -bsf:a aac_adtstoasc C:/daten/movieConcat.mov and it works fine. If I try to call it from a python subprocess: import subprocess cmd = [r"\\\\programs\\2d\\ffmpeg\\inst\\ffmpeg.bat", "-i", '"concat:C:/daten/movieA.ts1|C:/daten/movieB.ts2"', "-c", "copy", "-bsf:a aac_adtstoasc", "C:/daten/movieConcat.mov"] result = subprocess.run(cmd, shell=True, capture_output=True, text=True) if (...)
23:59
Cannot install snappy with brew - fatal error: 'cassert' file not found - kronus Newest 'ffmpeg' Questions - Stack Overflow

I am on an old mac - 10.14.6 - and I am trying to install ffmpeg via brew. I am finding errors during the make of snappy When I try to brew install snappy the same errors persist: ==> Installing dependencies for snzip: snappy ==> Installing snzip dependency: snappy ==> Patching ==> cmake . -DSNAPPY_BUILD_TESTS=OFF -DSNAPPY_BUILD_BENCHMARKS=OFF ==> make install Last 15 lines from /Users//Library/Logs/Homebrew/snappy/02.make: In file included from /tmp/snappy-20240323-80108-r3czy0/snappy-1.1.10/snappy.cc:29: In file included from (...)
21:26
Having issues parsing cropdetect values from ffmpeg in batch script - Alex Sadler Newest 'ffmpeg' Questions - Stack Overflow

I have this script that I'm trying to write that finds video files in a dir, automatically removes black bars and transcodes to x265... ⓐecho off setlocal enabledelayedexpansion REM Loop through all video files in the current directory for %%F in (*.mp4, *.avi, *.mkv, *.ts) do ( echo Processing "%%F" REM Use FFMPEG to detect crop values for /f "tokens=*" %%a in ('ffmpeg -i "%%F" -vf "cropdetect" -f null - 2^>^&1 ^| find /i "crop="') do ( set cropfilter=%%a ) REM Extract the crop filter result set (...)
21:02
How is better to use ffmpeg with the ASP.NET Core, on Linux? - user8245660 Newest 'ffmpeg' Questions - Stack Overflow

I've got the project (ASP.NET Core, on Linux) where are the several tasks, which relate to the video converting and extracting frames from the video file. I thought about the two possible options: using ffmpeg console utility using P/Invoke with the libavcodec library and others, which ffmpeg uses The second option is miles harder and may be very impractical, because it reminds me developing the new wrapper/library, instead of using the ready products. I've done googling, but there aren't well-done projects for the (...)
20:02
How exactly does this Jaccard distance logic (get_jaccarddist) in FFmpeg work? - stilloo Newest 'ffmpeg' Questions - Stack Overflow

I see this C code in FFmpeg source signature_lookup file for Jaccard distance in method get_jaccarddist. If you see in the code below that is calculating for 5 BagOfWords. Now for two BagOfWords with say nothing in common intersection would be 0, that means jaccarddist would be 0, so ideally its a bad pair but this if condition jaccarddist >= sc->thworddist, would be false isn't it but we want it to be true as its bad pair? What are the default values of sc->thworddist? Also surprised why jaccarddist is int and not float/double? /** * calculates the (...) -- this C code
17:31
NGINX RTMP - HLS Variants has no video - AndrewDragon Newest 'ffmpeg' Questions - Stack Overflow

I'm trying to get HLS Fragmentation to work using the NGINX-RTMP module. The livestream itself is working, its seems to just be an issue with the resolution changing. I'm also getting audio. This is the rtmp section of my nginx.conf rtmp server listen 1935; chunk_size 4096; application live live on; allow publish all; allow play all; exec ffmpeg -i rtmp://localhost/$app/$name -c:v libaom-av1 -b:v 1400k -c:a aac -b:a 128k -vf "scale=384:216" -tune zerolatency -f flv rtmp://localhost/hls/$name_bad -c:v (...)
17:27
FFmpeg outputs errors when encoding 32 bit float pcm file to an mp3 [closed] - Lazolv Newest 'ffmpeg' Questions - Stack Overflow

I am trying to: Record audio from my microphone on Windows 10 following this guide Encode gotten PCM file using FFmpeg 6.0 I figured out that the audio data recorded is in stereo 32 bit floating point little endian format with frequency of 48000 Hz. The audio is supposed to be 3 hand claps and importing them in Audacity as raw data with specified format works just fine. But using ffmpeg -f f32le -ar 48000 -ac 2 -i MicAudio.pcm MicAudio.mp3 outputs the following error: Assertion failed: cod_info->part2_3_length <= MAX_BITS_PER_CHANNEL, file (...) -- this, The PCM file itself
16:03
For converting video to frames, should I do client or server side processing? - Tomas Marson Newest 'ffmpeg' Questions - Stack Overflow

Here is the thing, I have a Nodejs API that serves one video at a time when client request it. The client (made in react) receives the video, which has no more than 15 seconds, watch it and decide if he wants to approve or deny it. If he approves the video, it must be displayed in a sort of frames carousel, with one frame per second, so there is no more than 15 images/frames. So the question is, should I do the conversion video-to-frames on client once he approves the video or should I do it on server-side and then request each frame (or streaming all frames with one request (...)
15:24
How do I stream audio from a mic in a raspberry pi with FFmpeg? - Ignacio Newest 'ffmpeg' Questions - Stack Overflow

I'm trying to follow this to stream audio from a mic in my raspberry pi. ignacioⓐpi-satellite-bigbedroom:~ $ ffmpeg -re -f pulse -ac 1 -i plughw:CARD=seeed2micvoicec,DEV=0 -f rtsp -rtsp_transport tcp rtsp://192.168.86.151:8554/live.stream ffmpeg version 4.3.6-0+deb11u1+rpt5 Copyright (c) 2000-2023 the FFmpeg developers built with gcc 10 (Debian 10.2.1-6) configuration: --prefix=/usr --extra-version=0+deb11u1+rpt5 --toolchain=hardened --incdir=/usr/include/aarch64-linux-gnu --enable-gpl --disable-stripping --enable-avresample (...)
14:33
Running FFMPEG in electron using react, either doesn't load without any error or throws an SharedArrayBuffer is not defined when run after building - Satnam Sandhu Newest 'ffmpeg' Questions - Stack Overflow

I am trying to build a web based media conversion tool to be able to ship with electron. const ffmpegInit = async () => try const baseURL = "https://unpkg.com/ⓐffmpeg/core-mtⓐ0.12.6/dist/esm"; const ffmpeg = ffmpegRef.current; ffmpeg.on("log", ( message ) => console.log(message); ); // toBlobURL is used to bypass CORS issue, urls with the same // domain can be used directly. await ffmpeg.load( coreURL: await toBlobURL( `$baseURL/ffmpeg-core.js`, "text/javascript", ), wasmURL: await toBlobURL( (...) -- FFMpeg's usage guide, tutorial in YouTube

22 mars

Newest 'ffmpeg' Questions - Stack Overflow http://stackoverflow.com/questions/tagged/ffmpeg

08:03
Split video stream with FFmpeg and play part with FFplay [closed] - Jan Hein Newest 'ffmpeg' Questions - Stack Overflow

I have a video stream send with FFmpeg to a other computer on my local network. At the receiver computer I want to split the video stream in multiple parts and play them at the receiver computer. How can I do that? Example: Stream send form sender to receiver is 1000x1000 pixels. At the receiver split the 1000x1000 pixel stream into four parts of 500x500 pixels, and play them all four on the receiver in a separate player. I have tryed it with a multicast stream to the receiver, and played it four times with FFplay, but that was not working correct. I also hve (...)
10:11
Wrong video information after encoding [closed] - Constadinos Chatzis Newest 'ffmpeg' Questions - Stack Overflow

Using FFMPEG for encoding videos from HDR to SDR with 3DLuts, i recently came to my attention that after the encoding the video has wrong information. The code i use is: -vf lut3d="example.cube" -c:v libx265 -crf 16 -c:a copy -preset fast Original HDR video infos: General Unique ID : 235922119201670445249046242281848857470 (0xB17CF2883DCE2BDE00E192235198637E) Complete name : example.mkv Format : Matroska Format version : Version 4 File size : 201 MiB Duration : 20 s 96 ms Overall bit rate mode : Variable Overall bit rate : 83.8 (...)
21:04
ffmpeg - Input link in1:v0 parameters (size 640x640, SAR 16:9) do not match the corresponding output link in0:v0 parameters (640x640, SAR 427:240) - fobus Newest 'ffmpeg' Questions - Stack Overflow

I'm trying to concat 4 mp4 files. I'm using the command below but not able to concat ffmpeg -i new1.mp4 -i new2.mp4 -i new3.mp4 -i new4.mp4 -filter_complex concat=n=4:v=1:a=1 output.mp4 Getting this error : Input link in1:v0 parameters (size 640x640, SAR 16:9) do not match the corresponding output link in0:v0 parameters (640x640, SAR 427:240) All four vides has the same codec and same size (640x640) and the same bitrate (30) What I am doing (...)
20:56
Retrieving and Saving media metadata using FFmpeg - Rahul Patwa Newest 'ffmpeg' Questions - Stack Overflow

I want to read the metadata in media files and then save that metadata in a text/xml file, so that I can later insert that data in my database. I would prefer to use ffmpeg. Also is the same thing possible with MediaInfo?? I know I can get the metadata for individual tracks using MediaInfo, but I would want to automate it; as in whenever a new media file is found, read its metadata and then store it in a txt/xml file. Or, is there any other tool/utility/API that I can use for (...)
20:18
FFMpeg : How to stream to Facebook Live? [closed] - Thomas Carlton Newest 'ffmpeg' Questions - Stack Overflow

I have ffmpeg on Windows. I would like to stream an mp4 file to Facebook Live. The video has an audio track. I am running the following command: ffmpeg -re -i video.mp4 -acodec libmp3lame -b:a 128k -pix_fmt yuv420p -profile:v baseline -bufsize 6000k -maxrate 1500k -deinterlace -vcodec libx264 -preset veryfast -g 30 -r 30 -f flv -flvflags no_duration_filesize "rtmps://live-api-s.facebook.com:443/rtmp/mykey" This command works for exactly 14 frames and then it stops. (...) -- ,
19:43
Can I Store the Output of FFmpeg to a Different PC [closed] - Justin Newest 'ffmpeg' Questions - Stack Overflow

I have a question about storing the output of a screen recording using FFmpeg. Currently, I want to use the: ffmpeg -video_size 1024x768 -framerate 25 -f x11grab -i :0.0 output.mp4 command to grab a screen recording on a remote Linux machine, where I am connecting to the Linux machine using ssh on my PC. I was wondering, would it be possible to save output.mp4 onto my local machine after ending the screen recording instead of on the remote Linux machine? Or to a different location instead of the Linux machine in general? I am new to Linux and using ssh, (...)
07:33
C++ FFmpeg encode stream to mp4 wrong fps and kbs - elmomoJacky Newest 'ffmpeg' Questions - Stack Overflow

i'm new to FFmpeg, i'm trying to learn how to encode images to an mp4 using a stream. But even tough i can generate a playable file, my file is "broken", it does does past 1sec, and if i check it's data with ffmpeg i can see that it's duration is accordly wrong with the kb/s fps value Duration: 00:00:00.01 .... 2635232 kb/s, 15463.09 fps. ffmpeg -i 25_5.mp4 -f ffmetadata 25_5.txt Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '25_5.mp4': Metadata: major_brand : isom minor_version : 512 compatible_brands: (...)
01:53
Android record video from multiple cameras and composite the multiple videos into one video - tonySilver Newest 'ffmpeg' Questions - Stack Overflow

Android Camera2 records video from multiple cameras, adds real-time timestamps to the frames captured by each camera, and finally composites the multiple videos into a single video file. does Android's native interface support these features? Do I have to user FFMPEG to handle the frames captured by each camera

21 mars

Newest 'ffmpeg' Questions - Stack Overflow http://stackoverflow.com/questions/tagged/ffmpeg

23:17
OSError: [WinError 6] The handle is invalid Python 3.10 Windows moviepy - ernesto casco velazquez Newest 'ffmpeg' Questions - Stack Overflow

I'm trying to make a clip using MoviePy but I getting error OSError: [WinError 6] Using Windows 11, Python 3.10.11 This is the method I'm trying to replicate. (The full github is here) def clip( content: str, video_file: str, outfile: str, image_file: str = '', offset: int = 0, duration: int = 0): """ Generate the Complete Clip content: str - Full content text video_file: str - Background video outfile: str - Filename of output image_file: str - Banner to display offset: int - Offset (...) -- (The full github is here)
21:37
ignore "channel_layout" when working with multichannel audio in ffmpeg - umläute Newest 'ffmpeg' Questions - Stack Overflow

I'm working with multichannel audio files (higher-order ambisonics), that typically have at least 16 channels. Sometimes I'm only interested in a subset of the audiochannels (e.g. the first 25 channels of a file that contains even more channels). For this I have a script like the following, that takes a multichannel input file, an output file and the number of channels I want to extract: #!/bin/sh infile=$1 outfile=$2 channels=$3 channelmap=$(seq -s"|" 0 $((channels-1))) ffmpeg -y -hide_banner \\ -i "$infile" \\ -filter_complex (...) -- channelmap filter
17:47
ffmpeg leaves audio gap when concatening videos [closed] - Rafael Newest 'ffmpeg' Questions - Stack Overflow

I am trying to cut a video in 2 parts then reassembling with ffmpeg but the final output has a small audio glitch right where the segments meet. I am using the following command to split the video 1.mp4 in 2 parts: ffmpeg -i 1.mp4 -ss 00:00:00 -t 00:00:02 -async 1 1-1.mp4 and ffmpeg -i 1.mp4 -ss 00:00:02 -t 00:00:02 -async 1 1-2.mp4 Once I have the 2 parts I am concatening them back together with: ffmpeg -f concat -i files.txt -c copy output.mp4 files.txt is correctly listing both files. Can (...)
17:35
Start and end time of MoviePy's VideoClip not working - ernesto casco velazquez Newest 'ffmpeg' Questions - Stack Overflow

I'm trying to add captions to a video. The desired outcome is to show each word in the exact moment is being said. I have a method that gives me the accurate time start and end per each word: def get_words_per_time(audio_speech_file): model = whisper.load_model("base") transcribe = model.transcribe( audio=audio_speech_file, fp16=False, word_timestamps=True ) segments = transcribe["segments"] words = [] for seg in segments: for word in seg["words"]: words.append( "word": word["word"], "start": (...) -- video
16:26
Can Imageio.getwriter to use codec 265? - GerrikLabra Newest 'ffmpeg' Questions - Stack Overflow

I have pip installed imageio[ffmpeg] (2.34.0), but the only FFMPEG codec the imageio wrapper seems to support is h264. When I run the below code with the following codecs, I get the error: I am trying to get DEVS or DEVLS codecs from the FFMPEG -codecs for my non-audio mp4 videos, any suggestions? from imageio import get_writer writer=get_writer("test.mp4",format="FFMPEG",mode="I",codec="gif") Incompatible pixel format 'yuv420p' for codec 'gif', auto-selecting format 'bgr8' [mp4 ⓐ 000002330fbede40] Could not find tag for codec gif (...)
14:37
Create multiple thumbnails from a video at equal times / intervals - Alexander Vakrilov Newest 'ffmpeg' Questions - Stack Overflow

I need to create multiple thumbnails (ex. 12) from a video at equal times using ffmpeg. So for example if the video is 60 seconds - I need to extract a screenshot every 5 seconds. Im using the following command to get the frame in the 5ths second. ffmpeg -ss 5 -i video.webm -frames:v 1 -s 120x90 thumbnail.jpeg Is there a way to get multiple thumbnails with one command?
12:59
How can ffmpeg decode video to jpeg? - Wendy Pan Newest 'ffmpeg' Questions - Stack Overflow

I am using ffmpeg to decode mp4 format video. After calling avcodec_decode_video2 function, I got a decoded frame in AVPixelFormat.AV_PIX_FMT_YUV420P. Is there a ffmpeg function that can convert the decoded frame into a jpeg file? I need to get the byte stream of the decoded jpeg images.
09:22
FFPMEG command to record screen works only from cmd on windows but not from my Java class - Youssef Hammouma Newest 'ffmpeg' Questions - Stack Overflow

i have a JUNIT test that uses a Java class called ScreenRecordingWatcher where i specified my ffpmeg command to record the computer when my test fails. But unfortunately, my command only works from my cmd and not from my class, On both sides it generates successfully my file, but when it is generated from my Java class, the file is not readable from my windows player (0xc10100be error). Here is the command i am using : C:\\outils\\ffmpeg-master-latest-win64-gpl\\bin\\ffmpeg.exe -f gdigrab -framerate 30 -i desktop -c:v h264_nvenc -qp 0 C:\\outils\\video\\output.mkv Here is (...)
08:06
How to transcode short video using FFmpeg, libx264 codec, Swift, iOS app - Dmitriy iOS Newest 'ffmpeg' Questions - Stack Overflow

The goal is to transcode a short video into .mov format using FFmpeg and libx264 codec. So far I have not been able to do this using third-party libraries. Using the command line, the video is perfectly transcoded, but I need it inside the application. If anyone has a solution I would be very grateful. The resulting video needs to have the following parameters, something like this: Picture 1 Picture 2 Picture 3 For example: let command = ["ffmpeg", "-i", videoOutputURL.path, "-c:v", "libx264", "-c:a", "copy", convertedVideoUrl.path] let ffmpegCommand = (...) -- FFmpeg, Picture 1, Picture 2, Picture 3
07:26
DVBSubtitles/Teletext Descriptors of a stream (ts-file) - hlodismy Newest 'ffmpeg' Questions - Stack Overflow

Can someone help me how to generate subtitles/teletext descriptor for according to paragraphs 6.2.41/6.2.43 (specification) , for my input ts-file? I tried to find something suitable in mediainfo/ffprobe/ffmpeg but couldn't find anything worthwhile. -- specification
03:27
How to re-encode an audio to match another one, to avoid re-encoding the whole audio - Bernard Wiesner Newest 'ffmpeg' Questions - Stack Overflow

I have an audio editor in the browser using ffmpeg (WebAssembly), and I want to insert new audio into the existing audio without having to re-encode everything. Re-encoding everything takes a long time, especially in the browser, so I would like to only re-encode the inserted file, match it to the original one and concatenate them using the copy command. On ffmpeg concatenate docs it says: All files must have the same streams (same codecs, same time base, etc.) But it is not clear what is meant by time base. So far I have observed I need to (...) -- docs, docs
01:01
ffmpeg libswresample channel mapping - Joseph Katrinka Newest 'ffmpeg' Questions - Stack Overflow

Im currently working on some c++ that uses ffmpeg to take audio from a stereo file and make a mono audio file using only the sample from one channel. I havent been able to find and examples of people using the swr_set_channel_mapping call online, so Im wondering if anyone knows of the correct usage. Right now Im doing something like this swr_alloc_set_opts2(&swrCtx, &out_channel_layout, AV_SAMPLE_FMT_S16, codecCtx->sample_rate, &codecCtx->ch_layout, codecCtx->sample_fmt, codecCtx->sample_rate, 0, NULL); int* channel_mapping = (int*)av_mallocz(2 * (...)

20 mars

Newest 'ffmpeg' Questions - Stack Overflow http://stackoverflow.com/questions/tagged/ffmpeg

21:55
Recording IP Camera stream with FFMPEG - Zohaib Khalid Newest 'ffmpeg' Questions - Stack Overflow

Hey I am trying to record the IP camera stream using FFMPEG . But it is giving me Input/Output error . Here is the command ffmpeg -i http://admin:ⓐip:81/livestream.cgi E:\\Video\\my.h264 My camera is H264 encoded. Now Please help how to remove this error . Any Help would be appreciated .
18:14
How to resolve "ffmpeg was killed with signal SIGSEGV" in docker container - Gmanicus Newest 'ffmpeg' Questions - Stack Overflow

I have a Node.js application deployed to a docker container with fluent-ffmpeg, ⓐffmpeg-installer/ffmpeg, and ⓐffprobe-installer/ffmprobe. Here is the fluent-ffmpeg init script: import ffmpeg = require('fluent-ffmpeg'); const ffmpegPath = require('ⓐffmpeg-installer/ffmpeg').path; const ffprobePath = require('ⓐffprobe-installer/ffprobe').path; ffmpeg.setFfmpegPath(ffmpegPath); ffmpeg.setFfprobePath(ffprobePath); export default ffmpeg; This gets used to take a snapshot of a video and save that image to (...)
17:13
Need to Download Videos From (Ap.lk) This site [closed] - Seamon Newest 'ffmpeg' Questions - Stack Overflow

Getting this error when using the URL with FFmpeg [https ⓐ 00000191353bfc00] No trailing CRLF found in HTTP header. Adding it [ in#0 ⓐ 00000191353aa580] Error opening input: Invalid data found when processing input Error opening input file https://video.ap.lk/stream/ad470e41-5a62-43da-b8ab-6a0e9d0a7316 Error opening input files: Invalid data found when processing input This is the regular URL that I use to get the video: https://video.ap.lk/stream/ad470e41-5a62-43da-b8ab-6a0e9d0a7316 Using this FFmpeg command: ffmpeg -user_agent (...) -- Getting this error when using the URL with FFmpeg, https://video.ap.lk/stream/ad470e41-5a62-43da-b8ab-6a0e9d0a7316
17:05
Livestream doesn't start unless I open the YouTube Live Dashboard [closed] - Gavin Trujillo Newest 'ffmpeg' Questions - Stack Overflow

I have a camera feed that streams 24/7 on YouTube. Everything works fine, except the stream often goes down due to internet reliability issues. I can detect that the stream is down with the v3/search endpoint, then an automated command is sent from my server to restart it, but the stream doesn't start like it should. I've discovered that the live stream will only start if I open the YouTube Live Dashboard first. Before opening the dashboard, my streaming software will upload data using the stream key, but there's no live stream. Upon opening the YouTube Live (...)
13:47
Getting FFProbe Information With Python - jesse Newest 'ffmpeg' Questions - Stack Overflow

I've been attempting to figure this out for forever now (I'm new to programming) and I can't figure it out. I'm attempting to build a script that will test the file, and give me output from which I can get information like "Audio Format" that I can then put into the filename. However, I can't even get the script to return any file info. I've hit a wall at inserting an input file... So at this point I just need help getting it to spit out info based on the argvs I've thrown in. Hopefully I'll be able to figure out how to parse the (...)
13:29
How to change resolution without compromising video quality using ffmpeg? - blake banker Newest 'ffmpeg' Questions - Stack Overflow

I'm trying to develop a simple video transcoding system. When you upload a video, After extracting the video and audio separately, I want to encode them at 360, 720, and 1080p resolutions respectively and then merge them to create three final mp4 files. At this time, I have two questions. Is there a big difference between encoding the video and audio separately in the original video file and encoding the original video file as is? In a related book, it is said that a system is created by separating video and audio, and I am curious as to why. I (...)
14:14
Combining an audio file with video file in python - Fahadkalis Newest 'ffmpeg' Questions - Stack Overflow

I am writing a program in Python on RaspberryPi(Raspbian), to combine / merge an audio file with video file. Format of Audio file is WAVE Format of Video file is h264 Audio and video already recorded and created at same time successfully, I just need to merge them now. Can you please guide me on how do I do that?
11:17
Convert m3u8 file to mp4 file in React Native Expo - DRx Newest 'ffmpeg' Questions - Stack Overflow

How can I convert m3u8 file to mp4 file in React Native Expo? I have tried to convert m3u8 file to mp4 using FFmpegKit but I have this errors: 'Cannot read property 'getLogLevel' of null' and 'Cannot read property 'ffmpegSession' of null' Also building with this package failing (Could not determine the dependencies of task ':ffmpeg-kit-react-native:compileDebugAidl'.). Is there a simple and easy way to convert m3u8 file in React Native Expo? Code I have used: import FFmpegKit from (...)
10:26
FFMPEG: Using av_write_frame AFTER av_write_trailer - Aleksei Komarov Newest 'ffmpeg' Questions - Stack Overflow

I'm using avio_alloc_context with my own "write_buffer_proc" to override file i/o. I am trying to continue writing the stream with av_write_frame AFTER av_write_trailer was called. But av_write_trailer has some strange side effects. The result is AV in module 'avformat-58.dll' (Read of address 0000000000000090) I think that FormatContext becomes invalid after av_write_trailer. How Can I fix it? Can I try to save FormatContext somewhere before calling av_write_trailer (...)

19 mars

Newest 'ffmpeg' Questions - Stack Overflow http://stackoverflow.com/questions/tagged/ffmpeg

22:59
Struggling to add subtitles to a video using FFMPEG and C# - MattHodson Newest 'ffmpeg' Questions - Stack Overflow

I'm trying to add subtitles to my videos, 100% with code using FFMPEG and C#. But I'm getting the following error: ffmpeg version 2024-02-04-git-7375a6ca7b-essentials_build-www.gyan.dev Copyright (c) 2000-2024 the FFmpeg developers built with gcc 12.2.0 (Rev10, Built by MSYS2 project) configuration: --enable-gpl --enable-version3 --enable-static --pkg-config=pkgconf --disable-w32threads --disable-autodetect --enable-fontconfig --enable-iconv --enable-gnutls --enable-libxml2 --enable-gmp --enable-bzlib --enable-lzma --enable-zlib --enable-libsrt (...)
22:06
ffmpeg fixed video noise reduction - leo Newest 'ffmpeg' Questions - Stack Overflow

I have a camera with a fixed noise (video sample). Is it possible to remove this noise completely using ffmpeg? I tried ffmpeg "-vf" noise reduction but didn't find any way to remove the noise by supplying a noise mask. -- video sample
21:16
Issues with FFMPEG swresample and channel mapping - Joseph Katrinka Newest 'ffmpeg' Questions - Stack Overflow

Ive linked FFMPEG libs to a C++ project Im working on in VS2017 and have had mostly no problems with it so far. Im currently trying to use it to extract audio from a movie file and save it as a wav file. I managed to do this just fine, and my next step is to make a "split into mono". To make 2 mono wav files, one from the left channel and one from the right channel of a stereo file. My code works for the orignal usecase, stereo to stereo (one wav file) and also works for when Im just doing the left, but when doing the right it fails. Exception thrown at (...)
09:05
How can I extract multiple non-regular segments from a video using ffmpeg on Windows? [closed] - Skeeve Newest 'ffmpeg' Questions - Stack Overflow

I'm trying to extract some segments from a video (and optionally combine them) using ffmpeg... but I'm not getting very far. Compared to the various examples I've found here, in the ffmpeg docs and elsewhere, I don't want to extract segments at regular intervals. Gleaning some info from a number of sources, I think I can do something like:- ffmpeg -f concat -i seg.txt -c copy out_%03d.mp4 ...but that doesn't seem to work, owing to a couple of issues... the 'out_%03d.mp4' isn't being expanded into (...)
14:15
FFMPEG Extremely High Read On Disk When Transcoding - Jace Mayer Newest 'ffmpeg' Questions - Stack Overflow

I'm trying to use FFMPEG to transcode a h264 encoded file to mpegs, for use in streaming. The command used is: ffmpeg -v debug -re -i 'input.mkv' -acodec mp3 -f mpegts - Which is ran in a Python subprocess, and the output is streamed to the connected client over HTTP. I've tried mp4 encoding unsuccessfully, most likely due to the MOOV atom. The issue is, the ffmpeg process is reading terabytes of data for a less than 500mb file. I've tried changing the FFMPEG command to use different encoders. But, the high disk usage still (...)
10:34
Burn subtitles with emojis on a video in android java - Maor Cohen Newest 'ffmpeg' Questions - Stack Overflow

video.mp4, subtitles.ass the ass file contains emojis. how to burn it on a video? I tried ffmpeg. ffmpeg -i video.mp4 -vf "ass=subtitles.ass" -c:a copy -c:v h264 -crf 23 -preset veryfast output.mp4 but the emojis are not showing. instead, rectangles are showing. it happens in every font I choose. subtitles.ass: Format: Name, Fontname, Fontsize, PrimaryColour, SecondaryColour, OutlineColour, BackColour, Bold, Italic, Underline, StrikeOut, ScaleX, ScaleY, Spacing, Angle, BorderStyle, Outline, Shadow, Alignment, MarginL, MarginR, MarginV, Encoding Style: (...)
07:01
mpv player with SFTP does not work in bash script [closed] - Pickles888 Newest 'ffmpeg' Questions - Stack Overflow

I am making a bash script to make it easier to stream from my media server at home. In the bash script, it asks whether you want to list or search, and then uses mpv to stream the file. For some reason it says the file does not exist. When I try this in the terminal it works, but running the script gives this error: [ffmpeg] libssh: Error opening sftp file: SFTP server: No such file Failed to open sftp://[username:password]ⓐ[ip.of.server]/[directory/to/file] My script: #!/bin/bash pass="[password]" if [ $(nmcli | grep -c [home-network]) -gt 0 (...)
05:41
How to modify fps in ffmpeg,and pushing flow lag - user23573873 Newest 'ffmpeg' Questions - Stack Overflow

I used ffmpeg+rtmp for streaming, but it got stuck. I want to modify the fps in the red box in Figure 1. How can I modify it？And Figure 2 shows the streaming parameters. How to modify them so that the streaming does not lag Figure1 Figure2 I am trying to modify ffmpeg, hoping that the streaming does not lag -- Figure1, Figure2
02:05
How to use bazel and Rules_foreign_cc to build ffmpeg and ffnvcodec - Simon Chen Newest 'ffmpeg' Questions - Stack Overflow

I want build ffmpeg with --enable-nvenc. And it need to install this headers https://github.com/FFmpeg/nv-codec-headers. How to write the BUILD files? I used a simple cc_library, but ffmpeg dependencies check not passed. I got an Error ERROR: nvenc requested, but not all dependencies are satisfied: ffnvcodec https://github.com/FFmpeg/FFmpeg/blob/01fc3034ee8e97b7df25645f7c724d4d70363a87/configure#L6265 What should i do? -- https://github.com/FFmpeg/nv-codec-headers, https://github.com/FFmpeg/FFmpeg/blob/01fc3034ee8e97b7df25645f7c724d4d70363a87/configure#L6265

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