26 May

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

• 07:23
  FFMPEG My stitched frames colors looks very different from my original video, causing my video to not be able to stitch it back properly - Wer Wer Newest 'ffmpeg' Questions - Stack Overflow
  I am trying to extract some frames off my video to do some form of steganography. I accidentally used a 120fps video, causing the files to be too big when i extract every single frame. To fix this, I decided to calculate how many frames is needed to hide the bits (LSB replacement for every 8 bit) and then extract only certain amount of frames. This means if i only need 1 frame, ill extract frame0.png ill remove frame0 from the original video encode my data into frame0.png stitch frame0 back into ffv1 video concatenate frame0 video to the rest of the video, frame0 (...) -- Frame0.mkv, original.mkv, results.mkv
• 05:48
  How to check 'Output bit depth' of the libx264 library in ffmpeg? - Greg Newest 'ffmpeg' Questions - Stack Overflow
  According to the x264 Encoding Guide, the crf scale depends on whether x264 is 8-bit or 10-bit. Supposedly x264 --help shows the Output bit depth. But on Windows ffmpeg -h full doesn't say anything about Output bit depth and the crf scale option is described as from -1 to FLT_MAX. How can I check if my ffmpeg is using 8-bit or 10-bit version of the libx264 library? -- x264 Encoding Guide
• 01:36
  FFMPEG img%d.png with Subdirectory - Xitano Newest 'ffmpeg' Questions - Stack Overflow
  How to use with subdirectory? Command: ffmpeg -framerate 1/X -i subdirectory/img%d.png -r 25 -pix_fmt yuv420p out.mp4 Result: Error opening input file subdirectory/img%d.png. It works in the same directory as the command, but when I try to use a subdirectory, it doesn't work.

25 May

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

• 01:10
  ffmpeg combine filters for audio and video [closed] - Wise Newest 'ffmpeg' Questions - Stack Overflow
  I am trying to use hue=s=0 alongside replacing audio using ffmpeg. I have this originally: /usr/bin/ffmpeg -y -i 'source.mp4' -filter_complex "amovie='audio.mp3':loop=0,asetpts=N/SR/TB[aud]" -map 0:v -map '[aud]' -c:v copy -c:a aac -b:a 128k -shortest 'out.mp4' This works great. Audio is replaced. Now I want to turn it black and white so I try to add hue=s=0: /usr/bin/ffmpeg -y -i 'source.mp4' -filter_complex "hue=s=0,amovie='audio.mp3':loop=0,asetpts=N/SR/TB[aud]" -map 0:v -map '[aud]' -c:v copy -c:a (...)
• 01:04
  Use ffmpeg to match an image to source frames in video [closed] - user22335954 Newest 'ffmpeg' Questions - Stack Overflow
  I'm trying to write an application to split a single video into multiple pieces based on the appearance of a specific image. (Think title cards). I have video files that may have more than one episode or content inside of a single file and I want them split anywhere I find that title card or image. My application works by the user providing a timestamp in the format of 00:00:00 to specify the title card image which is then used like this: ffmpeg -i FILE -qmin 1 -qscale:v 1 -vframes 00:00:00 -f image2 img.png Now I want to compare that image (img.png) to the source (...) -- https://ffmpeg.org/ffmpeg-filters.html#Examples-46
• 11:07
  How can I use physical computer's GPU on VMware Workstation? - ching Newest 'ffmpeg' Questions - Stack Overflow
  I am ching. I want to use GPU to accelerate video transcoding time by using ffmpeg on the virtual machine, VMware Workstation. I use command lspci | grep VGA, the output is 00:0f.0 VGA compatible controller: VMware SVGA II Adapter It seems that I only can use its own Graphic Card on VMware, right? How can I use my physical computer's GPU, NVIDIA Quadro K2000? Or another solution can solve the problem mentioned on the (...)
• 11:06
  Compress video using ffmpeg.js - John Mark Newest 'ffmpeg' Questions - Stack Overflow
  I attempted to upload and compress a video using ffmpeg.js. However, it appears that this process is ineffective on modern browsers. I have already implemented console logging to verify if the video compression is occurring, yet thus far, no compression has been achieved. Could anyone suggest an alternative library for video compression that might better suit the requirements? import FFmpeg from 'ⓐffmpeg/ffmpeg'; export default methods: async handleFileInputChange(event) const file = (...)
• 07:09
  FFmpeg Error: Cannot find a matching stream for unlabeled input pad 0 on filter Parsed_amix_54 - Josh Lawson Newest 'ffmpeg' Questions - Stack Overflow
  I'm working on a project to generate a click track using React.js and FFmpeg. The project includes an Express.js backend where I construct an FFmpeg command to combine multiple audio files (count-ins, vocal cues, and click sounds) into a single track. The final output should be an MP3 file. However, I'm encountering an error when running the FFmpeg command: Cannot find a matching stream for unlabeled input pad 0 on filter Parsed_amix_54 How can I correctly construct the FFmpeg command to avoid the "Cannot find a matching stream for unlabeled input pad" error (...)

24 May

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

• 13:45
  I use ffmpeg to encode and create MPEG file from a source MP4 file. In Mac the encoding is good but in windows it creates random green pixels [closed] - Amudhan R Newest 'ffmpeg' Questions - Stack Overflow
  I use ffmpeg 3.4.2 version to encode and create an MPEG-TS file using H.264 encoding. In both Windows and Mac the ffmpeg creates the video without any error. But the resultant video from windows having a green pixels on certain frames. No idea why this is happening. Below is the encoding command: ffmpeg -i VIDEO_SOURCE.mp4 -vf scale=720:480 -c:v libx264 -b:v 2M -minrate 2M -maxrate 2M -bufsize 2M -level:v 40 -profile:v main -bf:v 2 -r 30 -crf 22 -x264-params 'keyint=3:min-keyint=3:ref=2:8x8dct=0:weightp=1:subme=6:rc-lookahead=30' -c:a aac -b:a 130k -ar 48000 -f mpegts (...)
• 00:17
  ffmpeg Ghosting between RGB color channels [closed] - Blikpils Newest 'ffmpeg' Questions - Stack Overflow
  This seems like a very specific question so i hope there is someone who can help me out. Within FFMPEG i am trying to add (channel pack) 3 different grayscale videos in RGB within a webm or mp4 video. I got it to work to a degree via Merge planes. This is what i tried: ffmpeg -y -i video1.webm -i video2.webm -i video3.webm -filter_complex "[0:v]format=gray[r]; [1:v]format=gray[g]; [2:v]format=gray[b]; [g][b][r]mergeplanes=0x001020:format=gbrp" -pix_fmt yuv420p -t 00:00:03 output.webm This is the result: As you see the 9 is visible in the red and blue (...) --
• 18:28
  How to use ffmpeg to convert a flac file to alac and preserving all metadatas? - AxZxP Newest 'ffmpeg' Questions - Stack Overflow
  I use this loop to convert flac to alac : for i in *.flac; do ffmpeg -i "$i" -y -vn -c:a alac "$i%.flac".m4a; done But some tags are not exported. I tried to use the -map_metadata 0 -id3v2_version 2 flag but it does not change anything. Here you can find the tags that are copied (with or without the -map_metadata) : original tags tags copied When I use XLD Mac software it works perfectly but for some reasons I'd like to use CLI to convert flac (...) -- original tags, tags copied
• 15:33
  How to achieve real time video editing on Android? - Itamar Newest 'ffmpeg' Questions - Stack Overflow
  I've been working recently on a video-editing-related project on Android, and am desperately looking for resources related to video editing on the platform. The only video-editing related "method" or information I could find was using the FFmpeg library, which is pretty rich in features and capabilities but works really slow, operations such as reversing a 10-second video can take as long as 30 seconds, which delivers a really poor user experience. That being said, it seems that there are tons of Android video-editing apps that are capable of doing everything FFmpeg can, (...) -- InShot, PocketVideo, previous musical.ly TikTok
• 14:41
  How to convert .fbx to frame images - Ittefaq Technologies Newest 'ffmpeg' Questions - Stack Overflow
  I wanna to need help that i wanna to convert .fbx to video through script and i found a soluotion to do it through FFmpeg but it not supports .fbx so i need help in to get frame images so i can make video through ffmpeg or if i am goin in wrong direction you can help me I tried to convert a .fbx file to .obj using three.js and then create a video from the .obj file, but it didn't work. // Function to load FBX using FBXLoader function loadFBX(blob, loader, callback) var url = URL.createObjectURL(blob); loader.load(url, function(object)  (...)
• 14:08
  avcodec_find_encoder(AV_CODEC_ID_H264) returns null - Monjura Rumi Newest 'ffmpeg' Questions - Stack Overflow
  I am building an android application which will encode image captured from camera preview and later decode it. I am using ffmpeg library to encode and decode. To build static library with x264 I have used this tutorial. http://dl.dropbox.com/u/22605641/ffmpeg_android/main.html. As a source code of ffmpeg if I use the one downloaded from the link given in tutorial I can built it but can't build library if i use source code downloaded from here git clone git://source.ffmpeg.org/ffmpeg.git ffmpeg. I have built library in ubuntu and using it in windows 7 in Eclipse. As I need only h264 (...)
• 10:06
  Efficient Video Compression with ffmpeg.js - John Mark Newest 'ffmpeg' Questions - Stack Overflow
  I attempted to upload and compress a video using ffmpeg.js. However, it appears that this process is ineffective on modern browsers. I have already implemented console logging to verify if the video compression is occurring, yet thus far, no compression has been achieved. Could anyone suggest an alternative library for video compression that might better suit the requirements? import FFmpeg from 'ⓐffmpeg/ffmpeg'; export default methods: async handleFileInputChange(event) const file = (...)
• 08:04
  Decoding pcm_s16le with FFMPEG? - Davide Caresia Newest 'ffmpeg' Questions - Stack Overflow
  i have a problem decoding a wav file using ffmpeg. I'm new to it and i'm not quite used to it. In my application i have to input the audio file and get an array of samples to work on. I used ffmpeg to create a function that gets in input the path of the file, the position in time where to start to output the samples and the lenght of the chunk to decode in seconds. I have no reputation, so I had to make a gdrive directory where you can see the problem and the files on which I worked. Here it is: https://goo.gl/8KnjAj When I try to (...) -- https://goo.gl/8KnjAj
• 00:11
  Ghosting in colour channels - Blikpils Newest 'ffmpeg' Questions - Stack Overflow
  This seems like a very specific question so i hope there is someone who can help me out. Within FFMPEG i am trying to add (channel pack) 3 different grayscale videos in RGB within a webm or mp4 video. I got it to work to a degree via Merge planes. This is what i tried: ffmpeg -y -i video1.webm -i video2.webm -i video3.webm -filter_complex "[0:v]format=gray[r]; [1:v]format=gray[g]; [2:v]format=gray[b]; [g][b][r]mergeplanes=0x001020:format=gbrp" -pix_fmt yuv420p -t 00:00:03 output.webm This is the result: As you see the 9 is visible in the red and blue (...) --

23 May

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

• 13:03
  What is the good library for video editing module in react.js? [closed] - tayyab manzoor Newest 'ffmpeg' Questions - Stack Overflow
  I want to add a module for video editing in my web app. I have researched about video editing tools like ffmpeg but it is not working. is there any plugin for video editing or I have to build my own with jquery? Thanks I have tried with npm package like ffmpeg but it is not working and I want to know is there any other pacakge for video editing.
• 23:57
  FFMPEG stream from python to browser using socketio - sam Newest 'ffmpeg' Questions - Stack Overflow
  I want to show the video on the browser streamed by ffmpeg. Here's the python script which i made but can't find the way to do so since i am not much into javascript. Can anyone help me please ? import socketio import subprocess import uvicorn sio = socketio.AsyncServer(async_mode='asgi', cors_allowed_origins='*') app = socketio.ASGIApp(sio) ⓐsio.event async def connect(sid, environ): await sio.enter_room(sid, 'Streaming') ⓐsio.event async def stream(cid): video_path = (...)
• 13:45
  ffmpeg combine 3 mp4s and 1 mp3 into 1 mp4 with wiperight transitions - tim Newest 'ffmpeg' Questions - Stack Overflow
  How can I use ffmpeg to combine 3 mp4s and 1 mp3 into 1 mp4 with wiperight transitions between the videos and a fade out the audio at the end. The mp3 is longer than the the videos but I only want the resultant video to be the length of the 3 mp4s.
• 13:37
  NodeJS : Fail to write byte array input from webcam to ffmpeg spawn process - Thanesh Prabaghan Newest 'ffmpeg' Questions - Stack Overflow
  I'm using NodeJS server to display an HTML page which has webcam option. Once user visited to my NodeJS server, it will serve html page. User can allow webcam option and see webcam view on the page. In the backend, I send webcam stream (byte array) using socket.io. I receive byte array successfully in backend with the help of socket.io. BUT MY PROBLEM IS, I can't pipe this byte array to the ffmpeg spawn process. I don't know how to properly pipe this data to the ffmpeg. Once it done, all my problem will be solved. On the other side, I have node-media-server as (...)
• 10:43
  install ffmpeg on amazon ecr linux python - Luka Savic Newest 'ffmpeg' Questions - Stack Overflow
  I'm trying to install ffmpeg on docker for amazon lambda function. Code for Dockerfile is: FROM public.ecr.aws/lambda/python:3.8 # Copy function code COPY app.py $LAMBDA_TASK_ROOT # Install the function's dependencies using file requirements.txt # from your project folder. COPY requirements.txt . RUN yum install gcc -y RUN pip3 install -r requirements.txt --target "$LAMBDA_TASK_ROOT" RUN yum install -y ffmpeg # Set the CMD to your handler (could also be done as a parameter override outside of the Dockerfile) CMD (...)
• 11:54
  Android ffmpeg white space in input path causing "no such file or directory" - Mehran Newest 'ffmpeg' Questions - Stack Overflow
  I'm using the latest version of WritingMinds/ffmpeg-android-java library. I've tried single/double quoting the path with no success. I Logged my command after execution, please look to the input path where a subDirectory contains whiteSpace, a comma has been added between the space: ffmpeg, -i, "storage/emulated/0/Telegram/Telegram, Video/4_5828137322067002802.mp4", -vf... I split and run my command like this: String crop = "-ss " + skipTimeForCrop + " -noautorotate -i " + newPath + " -vframes 10 -vf (...) -- WritingMinds/ffmpeg-android-java
• 11:17
  FFMpeg fails to compile - Nicolas Appriou Newest 'ffmpeg' Questions - Stack Overflow
  I'm trying to compile a project that needs a specific version of ffmpeg to work. I isolated ffmpeg build and tried to compile it on its own as done in the parent project. It seems to be version 6.1.1, the build system downloads ffmpeg from this url https://github.com/FFmpeg/FFmpeg/archive/e38092ef9395d7049f871ef4d5411eb410e283e0.zip before building it. I'm using an up-to-date debian testing distribution. When trying to build it on my own, I got this error message: $ ./configure --enable-shared --disable-static --disable-programs --disable-doc $ (...) -- https://github.com/FFmpeg/FFmpeg/archive/e38092ef9395d7049f871ef4d5411eb410e283e0.zip
• 00:41
  Can't preserve metadata in ffmpeg video conversion - sakovias Newest 'ffmpeg' Questions - Stack Overflow
  I would like to preserve the creation time metadata when I convert videos using ffmpeg/avconv. Here is the file I'm trying to convert: $ ffmpeg -i in.avi ffmpeg version 0.8.6-4:0.8.6-0ubuntu0.12.04.1, Copyright (c) 2000-2013 the Libav developers built on Apr 2 2013 17:00:59 with gcc 4.6.3 Input #0, avi, from 'in.avi': Metadata: creation_time : 2013-08-12 06:59:14 encoder : CanonMVI06 Duration: 00:00:12.26, start: 0.000000, bitrate: 14549 kb/s Stream #0.0: Video: mjpeg, yuvj422p, 640x480, 30 tbr, 30 tbn, 30 tbc Stream (...)
• 00:12
  How to start CMD and execute command in current folder with a batch file [closed] - pzych0p4th Newest 'ffmpeg' Questions - Stack Overflow
  I have this command that I run via cmd in a folder and it executes without problems: for %i in (*) do ffmpeg -y -i "%i" -vcodec copy -acodec copy -map 0:v -map 0:a "%i.mp4" Now I want to create a batch file that I can just open and it will execute this command in the current folder. However for the life of me I cannot get anything to work. Ive tried googling the answer and tried lots of answers from here also, but it seems my knowledge is lacking a bit. If anyone can give any tips that would be appreciated, thanks. I apologize beforehand if something is blatantly (...)

22 May

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

• 23:04
  How to pipe in and pipe out of ffmpeg in python? [closed] - sa_penguin Newest 'ffmpeg' Questions - Stack Overflow
  I want to use ffmpeg as a middleman to perform a functionality. The camera frames will be read through opencv and passed to ffmpeg for processing. FFMPEG need to pass the processed frames to opencv for displaying. Below is what I tried. The code hangs and is not displaying anything. Any help will be appreciated. import cv2 import math import subprocess as sp import ffmpeg import numpy as np def main(): cap = cv2.VideoCapture(0) if not cap.isOpened(): print("Camera can't open\\nexit") return -1 width = 640 height = (...)
• 23:24
  SOLVED: How to start CMD and execute command in current folder with a batch file - pzych0p4th Newest 'ffmpeg' Questions - Stack Overflow
  I have this command that I run via cmd in a folder and it executes without problems: for %i in (*) do ffmpeg -y -i "%i" -vcodec copy -acodec copy -map 0:v -map 0:a "%i.mp4" Now I want to create a batch file that I can just open and it will execute this command in the current folder. However for the life of me I cannot get anything to work. Ive tried googling the answer and tried lots of answers from here also, but it seems my knowledge is lacking a bit. If anyone can give any tips that would be appreciated, thanks. I apologize beforehand if something is blatantly (...)
• 21:39
  Getting (Estimated) Time Offset of the Errors Reported by ffmpeg - Haru Newest 'ffmpeg' Questions - Stack Overflow
  I'm using ffmpeg to check for errors in video files, but while it reports tons of issues it doesn't tell me where exactly the error happens in the file. It just dumps some crazy long hex numbers (0x7fa…) which doesn't tell me anything. Is there a way to make it report some timestamps, or at least estimated timestamps, or byte-offsets into the stream? I tried the -debug_ts flag, but nothing changed in the output. $ ffmpeg -debug_ts -v error -i a_broken_file.mp4 -f null - [h264 ⓐ 0x7fa513023400] Reference 4 >= 4 [h264 ⓐ 0x7fa513023400] error while decoding MB (...)
• 17:42
  Where to (long time) host Spring Boot Application with Data Base Backup and Linux Root Access - Lord Helmchen Newest 'ffmpeg' Questions - Stack Overflow
  I developed a small application for my father. It uses Spring Boot, MySQL and FFMPEG, which I currently installed on Linux. I want to host it, deploy it automatically, have a back up and root access for FFMPEG installation. It runs smoothly locally on Windows / Linux, now I want to host it somewhere. What I would like to have: Ease of deployment: I got experience in adminstration of linux root servers, but I look for something easy to integrate and maybe automatically deploy it from Github or Gitlab Backup: I want to backup the database ideally to another (...)
• 09:54
  drawtext with ffmpeg python - Wolf Wolf Newest 'ffmpeg' Questions - Stack Overflow
  I am trying to add a text to a video using ffmpeg and python. I tried to do this in the following ways, but it didn't work. first ( ffmpeg .input(in_video) .filter('drawtext', fontsize=30, fontfile=r"D:\\projects\\python\\editor_bot\\downloads\\Candara.ttf", text='test test test.', x='if (eq(mod(t\\\\, 15)\\\\, 0)\\\\, rand(0\\\\, (w-text_w))\\\\, x)', y='if (eq(mod(t\\\\, 10)\\\\, 0)\\\\, rand(0\\\\, (h-text_h))\\\\, y)') .output(f'output-final.mp4') .run() ) second fil = (...)
• 08:12
  ffmpeg subtitles filter defaults to Helvetica instead of specified font - Vatsal Joshi Newest 'ffmpeg' Questions - Stack Overflow
  I am trying to use a custom font in the subtitles of a video using ffmpeg, but despite my efforts, the font defaults to Helvetica. Here is the code I am using: import ffmpeg import os import tempfile def test_subtitle_font(font_path): # Simple arbitrary video and audio stream video = ffmpeg.input('color=color=black:size=640x360:duration=5', f='lavfi') audio = ffmpeg.input('anullsrc=channel_layout=stereo:duration=5', f='lavfi') # Create arbitrary temp subtitle file with (...)

21 May

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

• 13:28
  FFmpeg stream extraction modifies subtitles [closed] - user18812922 Newest 'ffmpeg' Questions - Stack Overflow
  I have a video with the following ffprobe output: Input #0, matroska,webm, from 'video.mkv': Metadata: title : Video - 01 creation_time : 2021-07-14T02:49:59.000000Z ENCODER : Lavf58.29.100 Duration: 00:22:57.28, start: 0.000000, bitrate: 392 kb/s Chapters: Chapter #0:0: start 0.000000, end 86.169000 Metadata: title : Opening Chapter #0:1: start 86.169000, end 641.266000 Metadata: title : Part A Chapter #0:2: start 641.266000, end 651.359000 Metadata: title : Eyecatch Chapter #0:3: start (...)
• 09:56
  FFMpeg with xfade, 'auto_scale_x' inserted automatically. How to get rid of it? [closed] - userxxxxxxxxx Newest 'ffmpeg' Questions - Stack Overflow
  I'd like to use cuda gpu as below. But ffmpeg keep saying that Impossible to convert between the formats supported by the filter 'Parsed_hwupload_cuda_0' and the filter 'auto_scale_2' [fc#0 ⓐ 0000018ff3ff4e80] Error reinitializing filters! [fc#0 ⓐ 0000018ff3ff4e80] Task finished with error code: -40 (Function not implemented) [fc#0 ⓐ 0000018ff3ff4e80] Terminating thread with return code -40 (Function not implemented)"** *ffmpeg -y -loglevel debug -nostats -hide_banner -init_hw_device cuda=gpu:0 -hwaccel cuda -hwaccel_device gpu (...)
• 06:24
  When I use ffprobe to check a video stream，I get the error below [closed] - dongrixinyu Newest 'ffmpeg' Questions - Stack Overflow
  I came across with a problem when ffprobe and decoding video stream . Here is the log: ffprobe version 6.1.1 Copyright (c) 2007-2023 the FFmpeg developers built with gcc 9 (Ubuntu 9.4.0-1ubuntu1~20.04.2) configuration: --enable-gpl --enable-version3 --enable-shared --disable-w32threads --disable-autodetect --enable-fontconfig --enable-iconv --enable-gnutls --enable-libxml2 --enable-libsnappy --enable-zlib --enable-libsrt --enable-libssh --enable-libbluray --enable-libcaca --enable-sdl2 --enable-libdav1d --enable-libdavs2 --enable-libzvbi --enable-libwebp (...)
• 19:45
  I need to cut a batch of MP4 files to exactly a fixed value of 299 seconds [closed] - DruidCtba Newest 'ffmpeg' Questions - Stack Overflow
  I need some help :). I need to trim a batch of MP4 files to exactly 299 seconds, or 4 minutes and 59 seconds, and from what I've seen, ffmpeg can do this for me. I also need to merge them later on, all in batch, the files that were split above. I think two scripts can do this, it shouldn't be too complicated, but reading the ffmpeg documentation, I found it a bit tricky for me haha. The split can have segments like: Original_File_Name_001.MP4, Original_File_Name_002.MP4, and so on. I saw on github that there's a program, LOSSLESSCUT, which is great (...)
• 16:36
  How do I add a sine pulse to my audio file? I get stuck with an error with the code below: [closed] - imabug Newest 'ffmpeg' Questions - Stack Overflow
  #!/bin/bash # Set paths to your audio files input_file="File (File Path)" output_file="$(dirname "Repeat Item (File Path)")/Repeat Item-watermark.mp3" # Get the duration of the input file in seconds input_duration=$(ffprobe -v error -show_entries format=duration -of default=noprint_wrappers=1:nokey=1 "$input_file") # Run ffmpeg with the updated command ffmpeg -y -i "$input_file" -filter_complex " sine=frequency=438:duration=0.1,volume=12dB[beep]; aevalsrc=0:d=0.9[silence]; [beep][silence]concat=n=2:v=0:a=1[beep_pulse]; [beep_pulse]aloo
• 14:12
  Can av_freep() be replaced directly with the following implementation? - leafe Newest 'ffmpeg' Questions - Stack Overflow
  After reviewing the implementation of av_freep(void* arg) in the FFmpeg documentation, I have some questions. Specifically, can its code be simplified to the following form? FFmpeg Implementation: void av_freep(void* arg) void* val; memcpy(&val, arg, sizeof(val)); memcpy(arg, &(void*) NULL , sizeof(val)); av_free(val); my version: void av_freep(void* arg) free(*arg); *arg = (...)
• 20:18
  Install ffmpeg in to virtual environment - ldg Newest 'ffmpeg' Questions - Stack Overflow
  I am trying to install ffmpeg in order to use it on OpenAI to record videos. I have installed it using brew install ffmpeg but somehow when I compile my code I get the same error, it is like the package is not recognized by my virtualenv where I am working. Error on Python console: raise error.DependencyNotInstalled("""Found neither the ffmpeg nor avconv executables. On OS X, you can install ffmpeg via `brew install ffmpeg`. On most Ubuntu variants, `sudo apt-get install ffmpeg` should do it. On Ubuntu 14.04, however, you'll need to install avconv with `sudo (...)
• 18:29
  play encrypted movies in vlc by decrypting them by ffmpeg "on the fly" - doctor Newest 'ffmpeg' Questions - Stack Overflow
  I would like to play encrypted movies in vlc by decrypting them by ffmpeg like below on macOS. The size of my movie is, say, 200-1000MB. (hundreds of files) My problem is that it is too slow to decrypt; it takes 5mins for 300MB movie before it starts to play. My guess is that ffmpeg first decrypts the whole content of 300MB and then VLC plays it. My question: Is it possible to play the movie "on the fly" while decrypting it? (play the decrypted chunk once it is decrypted, Not wait until the whole movie is decrypted before it plays, so that it starts to play in, say, (...)
• 16:12
  the ffmpeg recording does not stop after the test case is successfully executed, - ghufran Newest 'ffmpeg' Questions - Stack Overflow
  I am new to selenium, I want to add screen recording in my test cases, and I am using ffmpeg. The issue i am facing is the recording successfully starts, but it does not stop after the test case is successfully executed. Below is how my code is strcutured: package utilities; import java.io.BufferedReader; import java.io.IOException; import java.io.InputStreamReader; public class ScreenRecording private Process ffmpeg; private String outputFilePath; private boolean isRecording; public ScreenRecording(String outputFilePath) (...)
• 14:23
  ffmpeg - data is being "removed" while h264 is being processed by ffmpeg - Laki Newest 'ffmpeg' Questions - Stack Overflow
  I got a file which is created based on messages coming from streaming, all of the "messages" are ending with b'h264\\x00' I got a need to load the data into ffmpeg perform some processing of the data re-attach the data to same "messages" Data is loaded with ffmpeg and saved with ffmpeg - however - ffmpeg removes "part" of the data I have simplified the process and currently I am only loading and saving the data, without any processing, but still - part of the data is being removed I have used several commands - but always, part of my data (...)
• 12:33
  ffmpeg real-time buffer too full or near too full frame dropped, I even tried increasing rtbufsize. What could be going wrong? - Ali Azlan Newest 'ffmpeg' Questions - Stack Overflow
  We have a software where we capture the stream from the camera connected to the laptop or device using ffmpeg python, ffmpeg .input(video, s='640x480', **self.args) //tried with rtbufsize=1000M (enough I suupose/ also sometimes the error does not occur even on default rtbufsize which is around 3MB) .output('pipe:', format='rawvideo', pix_fmt='rgb24') .overwrite_output() .run_async(pipe_stdout=True) majority of the times when I start the software like the software is still initiating we receive the following error, (...)
• 09:43
  FFmpeg-Python command too long because of drawtext - Xascoria Newest 'ffmpeg' Questions - Stack Overflow
  I have a FFmpeg-Python program that puts subtitles into a video, pseudocode below: for i in range(10000): video= video.filter( 'drawtext', fontfile=FONT_FILE, text=cur_string, x='(w-text_w)/2', y='(h-text_h)/2', fontsize=FONT_SIZE, fontcolor=FONT_COLOR, borderw=2, bordercolor=FONT_OUTLINE_COLOR, enable=f'between(t,i,i+1)') video.output(PATH).run() The code above gives the following error: FileNotFoundError: [WinError 206] The filename or extension is too long My questions are: (1) Is (...)
• 11:20
  Issues with Publishing and Subscribing Rates for H.264 Video Streaming over RabbitMQ - Luis Newest 'ffmpeg' Questions - Stack Overflow
  I am working on a project to stream an H.264 video file using RabbitMQ (AMQP protocol) and display it in a web application. The setup involves capturing video frames, encoding them, sending them to RabbitMQ, and then consuming and decoding them on the web application side using Flask and Flask-SocketIO. However, I am encountering performance issues with the publishing and subscribing rates in RabbitMQ. I cannot seem to achieve more than 10 messages per second. This is not sufficient for smooth video streaming. I need help to diagnose and resolve these performance (...)
• 09:18
  How can I get decoded frames, which I sent into GPU, can i get them from GPU in rgb - Владислав Сапожник Newest 'ffmpeg' Questions - Stack Overflow
  I use ffmpeg.av_hwframe_transfer_data to sent decoded frames into GPU, but i can not get them again in another good format. I try to change my shaders, use av_hwframe_transfer_get_formats but it is not working!dfghkdsfiuhsgiherghoeirughoighweroigjoiwejgoiwrjgjeoijgoiewgoheroighoieqfgoihqeoigheiogieiqrhgihergh2eouirghou2rerhg My code: private static bool _readingComplete = false; private static bool _decodingComplete = false; private static readonly object _lock = new object(); private static Queue packets = new Queue(); private static readonly object (...)
• 06:38
  Find bytes range of webm video for specified segment - M2sh Newest 'ffmpeg' Questions - Stack Overflow
  I have a Video in webm format (like video.webm the duration is 60 seconds) I want to get specified segment of video (i.e split video) with http header range (Range: 100-200). In another word: I want to get a section of video (e.g. from second 4 to 12) but I don't want to use any converter like ffmpeg. I want to send http request to server and get specified range of webm file. Can I use this method (http range header)?  (...)
• 05:10
  FFMpeg with cuda, 'auto_scale_x' inserted automatically. How to get rid of it? - userxxxxxxxxx Newest 'ffmpeg' Questions - Stack Overflow
  I'd like to use cuda gpu as below. But ffmpeg keep saying that Impossible to convert between the formats supported by the filter 'Parsed_hwupload_cuda_0' and the filter 'auto_scale_2' [fc#0 ⓐ 0000018ff3ff4e80] Error reinitializing filters! [fc#0 ⓐ 0000018ff3ff4e80] Task finished with error code: -40 (Function not implemented) [fc#0 ⓐ 0000018ff3ff4e80] Terminating thread with return code -40 (Function not implemented)"** *ffmpeg -y -loglevel debug -nostats -hide_banner -init_hw_device cuda=gpu:0 -hwaccel cuda -hwaccel_device gpu (...)
• 03:52
  ffmpeg - transcoding.c - why the last packet is discard - itisyang Newest 'ffmpeg' Questions - Stack Overflow
  Using ffmpeg examples transcoding.c. (https://github.com/FFmpeg/FFmpeg/blob/release/4.1/doc/examples/transcoding.c) This is read by ffprobe.exe (ffprobe.exe -i test.mp4 -show_packets) [PACKET] codec_type=video stream_index=0 pts=162000 pts_time=1.800000 dts=162000 dts_time=1.800000 duration=18000 duration_time=0.200000 size=238317 pos=2285176 flags=__ [/PACKET] [PACKET] codec_type=video stream_index=0 pts=180000 pts_time=2.000000 dts=180000 dts_time=2.000000 duration=18000 duration_time=0.200000 si -- https://github.com/FFmpeg/FFmpeg/blob/release/4.1/doc/examples/transcoding.c

20 May

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

• 22:53
  How to speed-up ffmpeg encoding for the 'qtrle' codec - userxxxxxxxxx Newest 'ffmpeg' Questions - Stack Overflow
  Need you guys help for that I'm facing kinda limit of performance to encode clips with the codec 'qtrle'. In short, Is there GPU option or technic for the qtrle encoding by GPU? Can I get ANY of technic for qtrle? Does NVMe m.2 upgrade helps performance for ffmpeg concat and encoding? (Currently SKHynix P41 M.2 1TB on PCIe 4 board) (Several multiple times of re-encoding betewwen clips again again again in one loop, so that I cannot use h254 (...)
• 19:50
  Could not find ffmpeg executable, tried "/srv/linux-x64/ffmpeg" - Alan Newest 'ffmpeg' Questions - Stack Overflow
  I am trying to run my docker image on AWS EC2 Instance. However, I am having a trouble with the image file. When I run a task in AWS ECS, it says: Could not find ffmpeg executable, tried "/srv/linux-x64/ffmpeg", "/srv/app/node_modules/ⓐffmpeg-installer/linux-x64/ffmpeg" and "/srv/app/node_modules/ⓐffmpeg-installer/linux-x64/ffmpeg" This is my Dockerfile: FROM node:latest as server WORKDIR /srv/app COPY ./server/package*.json ./ RUN apt-get update && apt-get install -y 'ffmpeg' RUN npm install COPY ./server . RUN npm run (...)
• 16:15
  Is there a way to change the ffplay playback speed while running - richjhart Newest 'ffmpeg' Questions - Stack Overflow
  I am trying to modify ffplay 7.0 to allow us to modify the playback speed while running. Our use-case only involves basic video-only mp4 files. We can set the playback speed with something like the following: ffplay -i ..\\Video\\SampleVideoLong.mp4 -vf "setpts=5.0*PTS" -loglevel debug -sync video But I don't know how to change that option "live" (note if I don't choose -sync video, it gets very laggy - but that's fine as our use-case is video only. I have tried the following (with just a fixed rate at the moment): static double l_CurrentSpeed = (...)
• 12:34
  Render YUV frame using OpenTK [closed] - dima2012 terminator Newest 'ffmpeg' Questions - Stack Overflow
  my window Im trying to render YUV AVFrame, that i get from camera using OpenTK, im creating a rectangle and trying to apply a texture to it, but it doesnt work. Here is my window class using OpenTK.Graphics.Egl; using OpenTK.Graphics.OpenGL4; using OpenTK.Windowing.Common; using OpenTK.Windowing.Desktop; using OpenTK.Windowing.GraphicsLibraryFramework; using System; using System.Collections.Generic; using System.Diagnostics; using System.Linq; using System.Text; using System.Threading; using (...) -- my window
• 15:20
  ffmpeg: Render a two-pass MP4 timelapse video from a glob of JPEG images - algalg Newest 'ffmpeg' Questions - Stack Overflow
  In bash on an Ubuntu 22 LTS system, I have this line to make a timelapse video file from hundreds of collected JPEG images in a folder. ffmpeg -r 25 \\ -pattern_type glob -i "/some/path/input/*.jpg" \\ -vf "pad=ceil(iw/2)*2:ceil(ih/2)*2" \\ -pix_fmt yuvj420p -preset veryslow -qp 0 \\ -movflags +faststart \\ "/some/path/output/render.mp4" The input JPEGs are 4K, so the resulting video file in that same resolution, and at high quality (which is desired), renders to a very large video file (~250GB). Through trial and error, I've needed to add (...) -- this one
• 13:48
  Amplification of recorded audio in flutter app using FFMPEG not working correctly - Noman khanbhai Newest 'ffmpeg' Questions - Stack Overflow
  In my app I need to record audio and send it to server, server then sends the file to a hardware using mqtt and then file gets played on the hardware. I am using flutter to build app and using record 5.0.5 package for audio recording and for amplification ffmpeg_kit_flutter 6.0.3 package to do the amplification. The issue is it doesnt seems like there is much change in amplitude, I used different values for amplification factor but audio remains same. Here is the code for amplification Future? amplifyAudio( String inputPath, String outputPath) async // Build (...)
• 11:12
  Implement video playback using NodeJS, FFMPEG and HLS.JS - JayEm Newest 'ffmpeg' Questions - Stack Overflow
  I have RTSP stream coming from camera, which is converted to fragmented mp4 using FFMPEG. It is stored in a folder. Also manifest.m3u8 file is created using FFMPEG. I am using Hls.js player on frontend for playing the video, also using a time slider for seeking forward and backward according to timestamp on time slider. Need to dynamically generate moov file. My question is how do I implement above scenario on backend using NodeJS? I'm new to Video domain so please help. Thanks in advance. expected result should be when a user clicks on time slider on a specific (...)
• 09:24
  Showing in-video visual progress bar with FFMPEG? - Taapo Newest 'ffmpeg' Questions - Stack Overflow
  As OBS Studio lacks a visual indicator to show how far a video has progressed (and when you need to advance to the next scene), I was wondering if there is a command-line option (or solution) to get FFMPEG to re-encode the video and show a progress bar at the bottom of the video that shows how long the video has been playing so far. Is there such a feature?
• 09:20
  how to record screen using ffmpeg with variable framerate - AJ Dev Newest 'ffmpeg' Questions - Stack Overflow
  I want to record desktop using ffmpeg with variable framerate. set a limit of fps to 120fps now ffmpeg handle automatically that my max limit is 120 if pc is highly configured then record to 120 otherwise record auto fps like 5,10 whatever i searched on google i found -vsync 2 and -vsync vfr but these are not working. my command is ffmpeg -use_wallclock_as_timestamps 1 -re -vsync vfr -thread_queue_size 1024 -rtbufsize 1024 -indexmem 1024 -probesize 32 -analyzeduration 0 -framerate 120 -f rawvideo -pix_fmt rgb32 -video_size 1366x768 -i (...)
• 07:50
  FFMPEG: chroma key / greenscreen filter for images / video [closed] - user753676 Newest 'ffmpeg' Questions - Stack Overflow
  I need for a video to use chroma key filter / greenscreen filter and overlay it over another video and output it as new video.
• 02:12
  ffmpeg - how to apply filters without losing quality - Mickey Newest 'ffmpeg' Questions - Stack Overflow
  Here is a simple request, it has an input, output, and two watermarks. From what I gathered I can't apply -codec copy because I'm using a filter. ffmpeg -i input.mp4 -i wm-bl.png -i wm-br.png -filter_complex "overlay=x=0:y=H-h,overlay=x=W-w:y=H-h" output.mp4 This does the trick, as far as watermarking is concerned, but the output is compressed into half the original file size. Is it possible to watermark without losing video (...)
• 02:22
  About ffmpeg use [closed] - shijian Dong Newest 'ffmpeg' Questions - Stack Overflow
  Which version of ffmpeg supports amr_wb? ffmpeg -i D:\\test.mp4 -threads 5 -c:a amr_wb -ar 16000 -ac 1 -y D:\\test_wb.amr ->Unknown encoder 'amr_wb' generates an error when executing this command on windows: Unknown encoder 'amr_wb', but changing 'amr_WB' to 'amr_nb' will do,So I want to ask is the version not supported or something wrong。 I want to talk about converting an MP4 file to an amr_wb encoded amr (...)
• 01:20
  FFmpeg - sharpening the high pass filter - kubinka0505 Newest 'ffmpeg' Questions - Stack Overflow
  I'm writing the command that is resampling the audio file and adding the high-pass filter to it. In the software that I'm using, the high pass filter is very sharp - the problem is that I don't know how to sharpify the filter in FFmpeg. I've experimented with some options but none succeded. How can I achieve that? ffmpeg -i "Audio.wav" -ar 44100 -af highpass=f=5000 "Audio_HP.wav" -y What FFmpeg does What I (...) -- I've experimented with some options

19 May

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

• 13:35
  ffmpeg: After using scale2ref and concat filter only part of video is encoded [closed] - Ricardo Bohner Newest 'ffmpeg' Questions - Stack Overflow
  I'm trying to select some parts of an video, concat them, and apply an overlay that should have 1/6 of the video width: ffmpeg -reinit_filter 0 -i "input.mp4" -t 12 -loop 1 -i flag.webp -an -filter_complex "[0]select='between(t,3,9)',setpts=PTS-STARTPTS[P1];[0]select='between(t,12,15)',setpts=PTS-STARTPTS[P2];[0]select='between(t,60,70)',setpts=PTS-STARTPTS[P3];[P1][P2][P3]concat=n=3:v=1:a=0[vid];[1][vid]scale2ref=w=iw/6:h=ow/mdar[flag][vid];[vid][flag]overlay=x=20:y=20:enable='between(t,1,7)'[vid]" -map [vid] -c:v libx264 -b:v 900K -y (...)
• 17:17
  ffmpeg.wasm does not support nodejs - John Red Newest 'ffmpeg' Questions - Stack Overflow
  I use ffmpeg in the next js version and an error occurs Error: ffmpeg.wasm does not support nodejs "next": "14.1.4", "ⓐffmpeg/ffmpeg":"^0.12.10", "ⓐffmpeg/util": "^0.12.1", In another application this code works the only difference is the architecture in this code I am using FSD. 'use client' import FFmpeg from 'ⓐffmpeg/ffmpeg'; import fetchFile, toBlobURL from 'ⓐffmpeg/util'; import useRef, useState from 'react'; type useTranscodeProps = file: any, export const (...)
• 17:16
  Uncaught Exception: TypeError: Cannot read properties of undefined (reading 'format') - gzhe1056 Newest 'ffmpeg' Questions - Stack Overflow
  I've been having trouble with sending the video files to be read by ffprobe. I have fluent-ffmpeg and ffprobe installed but this error shows. I'm not sure what I'm missing index.js const electron = require('electron') const app, BrowserWindow, ipcMain = electron const ffmpeg = require('fluent-ffmpeg') let mainWindow // const ffmpeg = require('ⓐffmpeg-installer/ffmpeg'); // app.on('ready', function() // console.log('App is ready') // ) app.on('ready', function()  (...)
• 13:51
  How to convert CODEC of all videos in a folder from "Codec: MPEG-H Part2/HEVC (H.265) (hev1)" to "Codec: H264 - MPEG-4 AVC (part 10) (avc1)" [closed] - user25123807 Newest 'ffmpeg' Questions - Stack Overflow
  I've downloaded shows and cant get them to play on TV as the codec is not supported. H264 is a compatible codec. I have noted the codec of the videos I currently have (H256), and the codec which is compatible (264). I need help converting in bulk, all videos in a folder to the compatible codec - H264 - MPEG-4 AVC (part 10) (avc1). please help i have ffmpeg. I have tried changing the file type from mkv --> mp4 but the issue is the codec. I need help bulk converting the codec (265-->264). All the videos I am trying to convert to 264 are .mp4 (...)