5 March

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

• 19:27
  Covert video to frames, then back to video without altering the frames in python - Rashiq Newest 'ffmpeg' Questions - Stack Overflow
  I am writing a script in python that converts a video (let this video be X) into frames (X′) and then back into the same video (Y). Now, when I break video Y back into frames (Y′) the images are not equal to X′ frames i.e. they have different hashes. I would expect them to be the same, and if being not the same is the expected behaviour, how can I make them the same? Is there a way to go from `video, X --> frames, X′, --> video, Y, --> frames, Y′, --> video, Z, --> frames, Z′ and so on without changing the output from its previous state such the videos X, Y, Z and frames X′, Y′, (...) -- video-to-frame, frame-to-video
• 19:01
  Command 'ffplay' not found [duplicate] - Harsh Wardhan Newest 'ffmpeg' Questions - Stack Overflow
  I need ffmpeg-3 for some application while my Ubuntu 20.04 has ffmpeg-4 by default. So I uninstalled ffmpeg-4, downloaded ffmpeg 3.3.9 and installed it with following commands: ./configure make -j4 make install Now I have ffmpeg, ffserver and ffprobe working but no ffplay. There is a file ffplay.c in the directory but no executable. -- ffmpeg 3.3.9
• 18:42
  (Folderwide) Bulk conversion in ffmpeg to a H264 codec - Habboman Newest 'ffmpeg' Questions - Stack Overflow
  So I was trying to get a hang of ffmpeg but I am not very good at it. I am trying to get all .mkv files converted to .m4v with a H264 codec. From another project I know that the h264_cuvid decoder worked perfectly well for my needs. I also checked via ffmpeg -decoders that I wrote it correctly. So the windows-batchfile (I frankenstein-ed together from other forums) looks like this: for %%a in ("*.mkv") do ffmpeg -i "%%a" -c:v h264_cuvid -preset fast -crf 20 -b:v 128k "newfiles\\%%~na.m4v" pause What I get is sadly only: unknown encoder (...)
• 16:31
  I am getting input/output error when I am using FFmpeg. Ngnix is working fine status come ok for NGINX and snapped code is below please help me out - Rahul Newest 'ffmpeg' Questions - Stack Overflow
  ./stream1.sh ffmpeg -re -i sample.mp4 -vcodec copy -loop -1 -c:a aac -b:a 160k -ar 44100 -strict -2 -f flv rtmp:198.168.0.0/live/1234567890 ffmpeg version 2.8.15 Copyright (c) 2000-2018 the FFmpeg developers built with gcc 4.8.5 (GCC) 20150623 (Red Hat 4.8.5-36) configuration: --prefix=/usr --bindir=/usr/bin --datadir=/usr/share/ffmpeg --incdir=/usr/include/ffmpeg --libdir=/usr/lib64 --mandir=/usr/share/man --arch=x86_64 --optflags='-O2 -g -pipe -Wall -Wp,-D_FORTIFY_SOURCE=2 -fexceptions -fstack-protector-strong --param=ssp-buffer-size=4 -grecord-gcc-switches -m64 (...)
• 16:29
  Why would I receive input/output error with testsrc ffmpeg? - Dave Stein Newest 'ffmpeg' Questions - Stack Overflow
  I am trying to write an integration test which requires actually RTMP streaming to a 3rd party service. How to generate an RTMP test stream using ffmpeg command? seems like the right answer, however I can't get it to work. As a baseline, without RTMP, ffmpeg -f lavfi -i testsrc -t 30 -pix_fmt yuv420p test.mp4 works. ffmpeg -f lavfi -i testsrc -t 30 -pix_fmt yuv420p -f flv rtmp://mylocation gives me the error rtmp://mylocation: Input/output error I should note that the URL is valid, otherwise I get an error saying it can't open a (...)
• 15:27
  FFMPEG converted mp4 file does not play in firefox and chrome - stanley Newest 'ffmpeg' Questions - Stack Overflow
  I have used FFMPEG command to convert flv video file to mp4 and use html5 video tag and play video in browser. But after the video is converted to mp4 using ffmpeg it does not play in firefox and chrome browser. It displays a error saying 'No video with supported format and MIME type found'. I have added the code below, Please help. cmd /C ffmpeg -i INPUT_FILE_PATH -y -ar 22050 -ab 512 -b 800k -f mp4 -s 514*362 OUTPUT_FILE.mp4"
• 15:23
  Music queue, discord.py music bot - Luca M. Schmidt Newest 'ffmpeg' Questions - Stack Overflow
  I'm rather new/inexperienced with youtube-dl and python. I'm trying to add a queue system to my music cog. When possible it should be able to add songs and play the next song after the one before ended. An explanation on how it should work is sufficient, there's no need to provide any code at all. If any additional information is needed feel free to ask. My Code (Stripped down a bit): # IMPORT import discord from discord.ext import commands import json import asyncio import youtube_dl # (...)
• 15:17
  ffmpeg add background audio loop with video without overwriting existing audio - Munish Kapoor Newest 'ffmpeg' Questions - Stack Overflow
  I am trying to add a new background audio loop using ffmpeg in the existing video but when the new audio has been added. It overwrites existing audio in the video. I tried this command ffmpeg -i input.mp4 -stream_loop -1 -i input.mp3 -shortest -map 0:v:0 -map 1:a:0 -y out.mp4 Please help
• 15:07
  Creating a GIF with fluent-ffmpeg, overlay is not shown? - blablubla12 Newest 'ffmpeg' Questions - Stack Overflow
  I'm trying to create a GIF from an mp4 video, with an overlay on it. So there are two inputs, video.mp4 and overlay.png, both of them are https urls. The gif is created, ffmpeg shows no errors but the overlay doesn't appear in the gif. The code: ffmpeg() .withOptions([ '-i video.mp4' `-ss 1`, `-i overlay.png`, '-f gif', `-filter_complex [0:v]trim=duration=3,setpts=PTS-STARTPTS,scale=450:-1[trimmed];[trimmed]split[trimmed1][trimmed2];[trimmed2]reverse[rev];[trimmed1][rev]concat=n=2:v=1:a=0[v];[v][1:v]overlay=0:0:format=rgb[ove
• 14:48
  brodcast png & video ffmpeg with raspberry - FoxFr Newest 'ffmpeg' Questions - Stack Overflow
  Someone can help me to add a image during 10s beetwen the videos ? or explain me how do that ffmpeg \\ -i /dev/video0 \\ -i /dev/video2 \\ -i /home/pi/videopi/map.png \\ -stream_loop -1 -re -i "/home/pi/videopi/bed.mp3" \\ -filter_complex "[0][1]overlay=enable='lt(mod(t,60),30)'[v];[v]drawtext=textfile=/home/pi/videopi/gps.txt:reload=1:x=30:y=100:fontfile=OpenSans.ttf:font$ -map "[v]" \\ -map 2:a \\ -c:v libx264 -b:v 4000k -maxrate 4000k -bufsize 8000k -g 50 -c:a aac \\ -f flv rtmp://a.rtmp.youtube.com/live2/XXXXXXXXXX Below the (...)
• 13:32
  HTML5 live streaming with alpha channel - air5 Newest 'ffmpeg' Questions - Stack Overflow
  We are trying to live stream a video file with alpha channel. Adaptive streaming would be great, but it's not a must. Streaming is pretty new territory for us. We found out that WebM (VP9) seems to be the only format in the web that supports alpha channel. We tried using the nginx-rtmp-module as streaming server (MPEG-DASH) and broadcast the file with ffmpeg. But the alpha channel was lost. Probably because RTMP required us to broadcast the video as a FLV which doesn't support alpha. Is anyone having experience in streaming rgba videos on the web? Getting to know (...) -- this article
• 14:30
  Unknown encoder 'libx265' on Ubuntu 18.04 - user42 Newest 'ffmpeg' Questions - Stack Overflow
  I'm running the following command on my Ubuntu 20.04 ffmpeg -i input.mp4 -vcodec libx265 -crf 28 -f mp4 output.mp4 I get the statement: Unknown encoder 'libx265' I installed the encoder with the command sudo apt-get install libx265-dev libnuma-dev but I still get the same message. Do you know what I am doing wrong or how to get ffmpeg to work with this encoder?
• 14:17
  Hello! I have a little problem with my discord.py music bot - Luca M. Schmidt Newest 'ffmpeg' Questions - Stack Overflow
  i'm rather new/unexpierience with youtube-dl and python. The thing i'm triying to do is to add a queue system to my music cog. When possible it should be able to add songs and start the next song after the first one ended as well. You dont need to provide the complete code for it, tryingt to explain how it should work and giving some tipps should be enought. If more information is needed, feel free to ask. Thx for helping. My Code (Stripped down a bit): # IMPORT import discord from discord.ext import commands import json import (...)
• 12:09
  Overlay image zoom out and move - Pier Giorgio Misley Newest 'ffmpeg' Questions - Stack Overflow
  I have a video with an image overlay. The picture is set nearly full screen for the first 10 seconds, and aftwerwards I need to zoom out the image to a smaller size and place it in the bottom left corner for the rest of the video. At the moment I split the input image and overlay it twict to the video, without transitions, one for the "big" picture and one for the "small" picture and it works fine. What I would like to make is a "zoom out and moove" effect to make it smoother from the big central picture to the small one. This is my current complex filter: -i "video.mp4" (...)
• 11:53
  QTFF, ISO 14496-12 and elst-media_time value - aymv Newest 'ffmpeg' Questions - Stack Overflow
  What is the priority standard for decoding mov files? What value should be set in elst/media_time? Can we check it somehow? In QuickTime File Format Specification media_time is DT value: The edit list atom provides the initial DT value if it is nonempty (nonzero). In ISO IEC 14496-12 media_time is CT value. The Edit List Box provides the initial CT value if it is non‐empty (non‐zero). It looks like the media_time value can be calculated and checked with CT + ctts (for ISO IEC 14496-12). But how to (...)
• 11:14
  ffmpeg: handle videos with changing resolution - mSourire Newest 'ffmpeg' Questions - Stack Overflow
  I write a program, which concatenates input list of videos programmatically. The problem is that these videos are parts of a recorded stream, and their resolution may change few times within the same file. Currently, if that happens, ffmpeg fails, saying that it's not possible to concat files with different resolutions. Is there a way to make ffmpeg handling this automatically? A good solution would be selective scaling of frames with unexpected resolution. Here is a listing: ffmpeg -y -i 1.mkv -i 1.mka -max_muxing_queue_size 10000 -preset veryfast -r 30 -crf 20 (...)
• 10:44
  Playing video from FFMpeg command in Android MediaPlayer - ayon Newest 'ffmpeg' Questions - Stack Overflow
  In iOS, We can make a video composition with video track, audio track and some complex stuffs with AVComposition and we are able to play that with AVPlayer directly without writing that composition to a video file. Well, it is possible to make a similar composition of video with FFMpeg command in Android. It is also possible to stream from the command. My question is, can we play the output of a FFMpeg command in Android Media Player like playing a AVComposition in iOS? Thanks for your (...)
• 09:42
  How to resolve the source of an RTSP server unstable problem? - EricLu Newest 'ffmpeg' Questions - Stack Overflow
  I have already build an application by gstreamer rtsp-server with its appsrc. It's workingflow like test-appsrc. And I implement static void need_data (GstElement * appsrc, guint unused, MyContext * ctx) function using read from a IP camera's RTSP stream cv::VideoCapture in need_data. All this function is working well and it's have worked already for a day. However, I must use some algorithm deal with the IP camera source by OpenCV. When I do this algorithm at need_data. The RTSP Server seems unstable it always print something like the (...) -- test-appsrc
• 08:59
  Laravel not recognize laravel-ffmpeg methods - Sirsemy Newest 'ffmpeg' Questions - Stack Overflow
  I'd like to put a watermark to a streaming video with Laravel-ffmpeg repo from Github, but it doesn't recognize its own methods. I've installed the package with composer according to the repo-s readme.md file from here: https://github.com/pascalbaljetmedia/laravel-ffmpeg I know that there was a similar question here. But nobody answered the question and I've got the method inside the files. The installation worked properly. And to stream the video I use these codes: (...) -- https://github.com/pascalbaljetmedia/laravel-ffmpeg, https://codesamplez.com/programming/php-html5-video-streaming-tutorial
• 08:49
  How to install avconv on Ubuntu 18.04.5 Bionic - UrviG Newest 'ffmpeg' Questions - Stack Overflow
  I want to use avconv for audio related operations on my Ubuntu Bionic 18.04.5 system, but it's not getting installed as a part of the following packages. sudo apt-get install ffmpeg:i386 sudo apt-get install ffmpeg I still get.. avconv: command not found
• 07:36
  ffmpeg Problem with converting. ffmpeg converts image attachments to stream? [closed] - For Fun Newest 'ffmpeg' Questions - Stack Overflow
  I have a mp4 file with cover.jpg as attachments but when I use -c copy to convert to mkv the image won't stay as attachments ffmpeg changes it to stream 0:2? ffmpeg -i 'file.mp4' -c copy -map 0 'output.mkv' Full Log: https://pastebin.com/raw/L9Ss3qbx -- https://pastebin.com/raw/L9Ss3qbx
• 05:00
  FFMPEG Save stream frames to single image file (not sequence) [duplicate] - Nikola Knežević Newest 'ffmpeg' Questions - Stack Overflow
  Is there a way to open a stream (usb webcam for example) and save each frame to the same image file? That image would be later accessed as a simple resource from whichever protocol/service. I tried this: ffmpeg.exe -f dshow -i video="ASUS USB2.0 Webcam" image.png but it fails to write second frame. Error: Could not get frame filename number 2 from pattern 'image.png' Sure, I can make a script to periodically starts ffmpeg and save only one frame, but that's a huge performance (...)
• 04:59
  How can I extract a good quality JPEG image from a video file with ffmpeg? - Daniel Gartmann Newest 'ffmpeg' Questions - Stack Overflow
  Currently I am using this command to extract the images: ffmpeg -i input.mp4 output_%03d.jpeg But how can I improve the JPEG image quality?
• 04:53
  Usage pipe input on ffmpeg - CancerYoon Newest 'ffmpeg' Questions - Stack Overflow
  I want to cat + pv + ffmpeg command like this: cat FILE | pv -L 6M | ffmpeg -y -f mp4 -i pipe: -f mp4 out.mp4 but, i can see error like: pipe:: Invalid data found when processing input How to fix it? ffmpeg : ffmpeg version 4.3.2-static

4 March

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

• 23:37
  How to use multi-input filters with ffmpeg-python - Benjamin Barrois Newest 'ffmpeg' Questions - Stack Overflow
  I want to mimic the following ffmpeg command with ffmpeg-python ffmpeg -y -i in.mp4 -t 30 -filter_complex "fps=10,scale=-1:-1:flags=lanczos[x];[0:v]palettegen[y];[x][y]paletteuse" out.gif So far, this is what I've got: in_stream = ffmpeg.input(src, ss=start_time, t=(stop_time-start_time)) scale_input = in_stream if fps >= 1: stream = ffmpeg.filter(in_stream['v'], 'fps', fps) scale_input = stream stream = ffmpeg.filter(scale_input, 'scale', output_width, output_height, (...)
• 22:41
  ffmpeg: Input link parameters do not match the corresponding output link parameters, when concatenating same size videos - mSourire Newest 'ffmpeg' Questions - Stack Overflow
  I'm trying to combine a video and an audio, using the following command: ffmpeg -y -i 1.mkv -i 1.mka -max_muxing_queue_size 10000 -preset veryfast -r 30 -crf 20 -b:a 96000 -vbr on -strict experimental -filter_complex ' color=black:s=320x240:d=7ms[black0]; aevalsrc=0:d=15ms[silence1]; [black0][0]concat=n=2:v=1:a=0[video]; [1][silence1]concat=n=2:v=0:a=1[audio]' -map [video] -map [audio] -c:v libvpx -c:a libopus output.webm But ffmpeg returns an error: [Parsed_concat_2 ⓐ 0x7f8004506d00] Input link in0:v0 parameters (size (...)
• 22:06
  How to encode jpeg images to H264 very fast (transform images to video) - Paul Newest 'ffmpeg' Questions - Stack Overflow
  I have 30 JPEG images (.jpg) at a resolution of 480 x 640. Each image takes aboout 20KB (all of them takes about 600KB). I am using FFmpeg command to encode these images into a video in H264 format. I need this to be done very fast - about 1 second. Using the classic command: ffmpeg -y -f image2 -r 1/5 -i image_%d.jpg -c:v libx264 -r 30 video.mp4 takes about 90 seconds. After adding -preset ultrafast: ffmpeg -y -f image2 -r 1/5 -i image_%d.jpg -c:v libx264 -preset ultrafast -r 30 video.mp4 the (...)
• 07:20
  Convert .mp4 to .ts using H264 at constant framerate 25fps [closed] - losing-my-marbles Newest 'ffmpeg' Questions - Stack Overflow
  I've been trying to do this conversion for a couple of days reading through forums ffmpeg -i in1.mp4 -vcodec libx264 -s 720x576 -vf "fps=25"-vsync cfr -b:v 2300k -acodec aac -b:a 128k out1.ts I've tried the below flags found in other forums. ... -r 25 -vf fps=25 -filter:v fps=25 -filter:v fps=fps=25 I then read the file using mediainfo and keep getting the same result; Frame rate mode : VFR Frame rate mode : Variable Frame rate : 46.875 Frame rate : 46.875 FPS (1024 (...)
• 19:28
  ffmpeg: How to save SSIM and PSNR to a file? - idoo Newest 'ffmpeg' Questions - Stack Overflow
  I'm a ffmpeg newbie. I would like my script to output the average PSNR and average SSIM values to a file. (but not the values for every frame) I can output them to the standard output but not to a file. I use this line: ffmpeg -i ref.avi -i compressed.avi -lavfi "ssim;[0:v][1:v]psnr" -f null - I understand I have to change something here: "-f null -" , but I cannot make it work.
• 18:43
  How to merge two videos without losing the quality using ffmpeg - Vinayak Newest 'ffmpeg' Questions - Stack Overflow
  Currently am using this command but the quality was decreasing so suggest me how to merge without losing the quality "-y", "-i", path_real, "-i", outputfile4, "-strict", "experimental", "-filter_complex", "[0:v]scale=480x640,setsar=1:1[v0];[1:v]scale=480x640,setsar=1:1[v1];[v0][0:a][v1][1:a] concat=n=2:v=1:a=1", "-ab", "48000", "-ac", "2", "-ar", "22050", "-s", "480x640", "-vcodec", "libx264", "-crf", "27", "-q", "4", "-preset", "ultrafast", (...)
• 20:26
  Using ffmpeg to extract webvtt (SRT) subtitles - user15332104 Newest 'ffmpeg' Questions - Stack Overflow
  I am trying to extract SRT subtitles from the movies online with use of ffmpeg. Unfortunately transmission drops after some segments, and there is no output SRT file Any advice which switch use? Anything else than ffmpeg would serve the purpose here? ffmpeg -i "https://rts-vod-amd.akamaized.net/ch/hls/11997514/8f3c162a-6224-3cac-8f47-788ef9fd24dc/index-f7.m3u8" -scodec srt berry_subs.srt (Actual movie: https://www.rts.ch/play/tv/telefilm/video/meurtres-en-berry?urn=urn:rts:video:11997514) ffmpeg -i (...) -- https://www.rts.ch/play/tv/telefilm/video/meurtres-en-berry?urn=urn:rts:video:11997514, https://www.rts.ch/play/tv/telefilm/video/meurtres-a-mulhouse?urn=urn:rts:video:12003885
• 13:48
  How can I concatenate 2 files in FFMPEG with different SAR and DAR values? [duplicate] - SBiswas Newest 'ffmpeg' Questions - Stack Overflow
  I am a newbie in FFMPEG. I have two MOV files of same 1920:1080 resolution, 25fps, 10s duration. But file1 has SAR 0:1 and another has SAR 135:136, DAR=30:17. I want to merge these two files and have used the code below for that: ffmpeg -i file1.mov -i file2.mov -filter_complex "[0:v]scale=1920:1080:force_original_aspect_ratio=1[v0]; [1:v]scale=1920:1080:force_original_aspect_ratio=1[v1]; [v0][v1]concat=n=2:v=1[v]" -map [v] output.mov But I am not able to and this is the error I am getting. [Parsed_concat_2 ⓐ 00000215182fd3c0] Input link in0:v0 parameters (size (...)
• 18:19
  FFmpeg av_hwdevice_ctx_create returns ENOMEM - lnogueir Newest 'ffmpeg' Questions - Stack Overflow
  I am trying to perform h264 video encoding on a GPU using the ffmpeg's vaapi library. I have been following this example from ffmpeg Github repo. It fails for me here: AVBufferRef* vaapi_encoder; int err = av_hwdevice_ctx_create(&vaapi_encoder, AV_HWDEVICE_TYPE_VAAPI, NULL, NULL, 0); This returns -12, which maps to ENOMEM (out of memory) error, but that doesn't make sense to me because I have plenty of memory. For reference, this is my output after running 'vainfo': libva info: VA-API version 1.7.0 libva info: Trying to (...) -- example
• 16:14
  Is there a way to use the ffmpeg binary/unix executable in a py2app application to run ffmpeg on computers without it installed? - Human Newest 'ffmpeg' Questions - Stack Overflow
  I wrote a small python script that is essentially just a text to speech script. It uses the pydub - audiosegment python library to convert the mp3 from gTTS to an ogg that can be played in pygame. A link to my github repository can be found here: https://github.com/AnupPlays/TTS this is the main function: def webscrape(): global x global b b.state(['disabled']) src = "sound.mp3" dst = "sound.ogg" murl = str(url.get()) response = requests.get(murl) response.raise_for_status() parse = bs4.BeautifulSoup(response.text, (...) -- https://github.com/AnupPlays/TTS
• 16:00
  Can I pipe multiple ffmpeg outputs to different pipes? - mr. rogers Newest 'ffmpeg' Questions - Stack Overflow
  I have an AWS workflow that streams an audio or video file from S3 to ffmpeg inside a lambda. Which then streams the encoded output back to S3. I want to extend that flow to generate DASH content. On my local device, I can generate the MPD file and the encoded AV files. And there's the problem. Encoding to dash generates at least two files, even with the -single_file flag. Can I limit the dash export to just the video or MPD file? Or can I somehow pipe the multiple outputs separately through some flag magic? Thanks in (...)
• 15:30
  Download billboard hot 100 (but only 50) mp3 files - Atlas Newest 'ffmpeg' Questions - Stack Overflow
  Yo yo yo. I got this insane idea to get 50 of the billboard hot 100 songs, download them into mp3 files, and then put them on private online radio. Problem is, the way I do it doesn't download each file one by one, it puts all the music together in one mp3 file. Here's my code so far (terrible, I know... I just wanna throw this together really quickly) const getChart = require("billboard-top-100"); const ffmpeg = require("fluent-ffmpeg"); const mkdir = require("fs"); const ytdl = require("ytdl-core"); const YT = (...)
• 14:03
  FFMPEG change -f segment commands to -f hls commands - user72261 Newest 'ffmpeg' Questions - Stack Overflow
  I am currently making a script in PHP to run some ffmpeg commands to take a concat and create a live streaming hls file from it. I was using an old version of ffmpeg and -f segment and this worked fine but I have had to update ffmpeg on the system for something else so I have been updating everything to use -f hls however this is creating issues the stream with -f hls is no longer live and keeps stopping and restarting at the end of every 5-10 seconds each segment should be around 6 seconds. this is my old command exec("ffmpeg -y -nostdin -hide_banner -re -f concat -safe 0 (...)
• 13:25
  Capture and Record Desktop Screen with/as Webcam Video - Bilal Ahmed Yaseen Newest 'ffmpeg' Questions - Stack Overflow
  Webcam lets others view either still pictures or motion video of a user or other object in front of it. I want to configure Webcam in a way that it start capturing desktop screen instead of what is in front of it. I want to manipulate desktop screen captured through Webcam using FFMPEG library. Such as: ffmpeg -f dshow -i video="Integrated Webcam" -f mp4 cam_stream.mp4 I want to use this same application to capture my Desktop Screen that will be possible just in that case when Webcam will be able to capture my Desktop Screen instead. So above command will (...)
• 13:09
  Capture Windows screen with ffmpeg - kamae Newest 'ffmpeg' Questions - Stack Overflow
  The ffmpeg is cross-platform and very powerful software to handle video/audio or to stream it. On Linux ffmpeg can capture X11 screen with a command below: ffmpeg -f x11grab -r 25 -s cif -i :0.0 out.mpeg But is it possible to grab Windows Desktop with ffmpeg? -- ffmpeg
• 13:08
  How can I get ffmpeg to stream my webcam? - nonlinearmind Newest 'ffmpeg' Questions - Stack Overflow
  I want to stream my webcam and managed to stream it successfully to bambuser.com using the following, but need to be able to view it locally. This successfully posts it to babuser: ffmpeg -v debug -f alsa -ac 1 -i hw:1,0 -acodec libmp3lame -itsoffset 00:00:00 -f video4linux2 -s 360x240 -i /dev/video0 -r 15 -f flv -ar 44100 rtmp://522f4133d0.fme.bambuser.com/b-fme/0bacf5bb634dbbbd52bdd99d71406dc6f362c I've tried the following, but get "RTMP_Connect0, failed to connect socket. 111 (Connection refused) rtmp://localhost:8090/: Operation not (...)
• 12:52
  Extract specific frames of youtube video without downloading video - Kashish Arora Newest 'ffmpeg' Questions - Stack Overflow
  I need to extract specific frames of an online video to work on an algorithm but I don't want to download the whole video because that would make it highly inefficient. For starters, I tried working with youtube videos. I can download whole of the video using youtube-dl in this way: ydl_opts = 'outtmpl': r'OUTPUT_DIRECTORY_HERE', with youtube_dl.YoutubeDL(ydl_opts) as ydl: ydl.download([url]) And then I can capture individual frames. I need to avoid downloading the whole video. After some research, I have found that ffmpeg might (...)
• 12:20
  ffmpeg error: Could not write header for output file #0 (incorrect codec parameters ?): No such file or directory - Syed Uddin Newest 'ffmpeg' Questions - Stack Overflow
  I have the following files in the Convert_video_to_HLS folder on my Desktop: input output script.sh video.key video.key.info The command I'm running is: bash ./Desktop/Convert_video_to_HLS/script.sh ./Desktop/Convert_video_to_HLS/input ./Desktop/Convert_video_to_HLS/video.key.info ./Desktop/Convert_video_to_HLS/video.key ./Desktop/Convert_video_to_HLS/output The contents of script.sh #!/bin/sh DIR=$1 DIR_KEY_INFO=$2 DIR_KEY=$3 OUTPUT=$4 echo $DIR # List all mp4 files on folder MP4_DIRS=$(find $DIR -type (...)
• 12:20
  FFmpeg Error while filtering: Cannot allocate memory While Using Gifs Overlay Over Video - Abhishek Sharma Newest 'ffmpeg' Questions - Stack Overflow
  creating overlay gif over video but One gif is stoping after one loop and all other gifs are in a continuous loop by default in the file and FFmpeg throws an error Command: ffmpeg -y -i "2021_03_04_03_54_43.mp4" -f lavfi -i "color=000000:s=540x960" -ignore_loop 0 -i "2021_03_04_03_55_08.gif" -ignore_loop 0 -i "2021_03_04_03_56_19.gif" -ignore_loop 0 -i "2021_03_04_04_02_29.gif" -ignore_loop 0 -i "2021_03_04_04_03_50.gif" -filter_complex (...)
• 11:41
  ffmpeg ssim gives me bad result for both high quality and bad quality compression - idoo Newest 'ffmpeg' Questions - Stack Overflow
  I want to use ssim to evaluate the compression quality. However, when I calculate the ssim values I get very similar (and low) results for very good lossless compression and for very bad. What do I do wrong ? For compression I do: ffmpeg -r 6 -y -i %005d.bmp+ -c:v libx264 -crf 1 x264_medium_crf_1.avi ffmpeg -r 6 -y -i %005d.bmp+ -c:v libx264 -crf 51 x264_medium_crf_51.avi For ssim: ffmpeg -i x264_medium_crf_1.avi -i ref.avi -lavfi "ssim;[0:v][1:v]psnr" -f null - ffmpeg -i x264_medium_crf_51.avi -i ref.avi -lavfi "ssim;[0:v][1:v]psnr" -f (...)
• 11:05
  How to use youtube-dl to record live stream in parts - Vikral Newest 'ffmpeg' Questions - Stack Overflow
  Just wondering if that's possible or not to break an m3u8 live stream recording every hour and restart the recording again. I don't want to press Ctrl-C every hour to stop the recording and restart it again to get a playable downloaded file. Instead, I want to automate this. Does anyone know if that is possible?
• 10:24
  How to send all traffic from tcp port 1935 through http_proxy? - Karol Gruszka Newest 'ffmpeg' Questions - Stack Overflow
  I'm using a server that uses an internal proxy to access the internet. In my use case, I need to live stream an application using FFmpeg to a Restream.io using RTMP protocol which can be run using port 1935. The problem is that FFmpeg probably doesn't make any use of environment variables like $http_proxy and it's unable to resolve live.restream.io hostname. So far I tried configuring proxychains by adding the internal proxy to the proxychains proxy list and it worked for a simple telnet connection without any problems - proxychains4 live.restream.io 1935 but (...) -- proxychains
• 07:09
  FFMPEG muxed as a private data stream and may not be recognized upon reading - Jimmy Newest 'ffmpeg' Questions - Stack Overflow
  I've came across a mkv with a codec of hevc , while trying to either convert it to m3u8 or mp4 I received this following message: [mpegts ⓐ 0x7f94de014600] Stream 1, codec flac, is muxed as a private data stream and may not be recognized upon reading. Is there something wrong with my ffmpeg parameters? To m3u8: #1 : ffmpeg -i aaa.mkv -s 1920x1080 -codec copy -bsf:v hevc_mp4toannexb -start_number 0 -hls_time 10 -segment_time 10 -hls_list_size 0 -f hls aaa.m3u8 #2 : ffmpeg -i aaa.mkv -s 1920x1080 -codec copy -c:v libx264 -bsf:v hevc_mp4toannexb (...)
• 05:49
  Is it possible to stream the output of an ffmpeg command to a client with dot net core? - Inondle Newest 'ffmpeg' Questions - Stack Overflow
  I'm trying to take two videos and transform them with ffmpeg into a single video. It works great if you take the two videos, run them through ffmpeg and then serve that file up via an API. Unfortunately the upper range for these videos is ~20 minutes, and this method takes too long to create the full video (~30 seconds w/ ultrafast). I had an idea to stream the output of the ffmpeg command to the client which would eliminate the need to wait for ffmpeg to create the whole video. I've tried to proof this out myself and haven't had much success. It could be my (...)
• 03:54
  FFMPEG m3u8 encoding change extension of TS files to something else - Dilshan Newest 'ffmpeg' Questions - Stack Overflow
  I'm using below command to encrypt a MP4 video into a m3u8 type. const cmd = "ffmpeg"; const args = [ "-i", `$input`, "-c", "copy", "-bsf:v", "h264_mp4toannexb", "-hls_list_size", "0", "-hls_time", "10", "-hls_key_info_file", "enc.keyinfo", `output/$outputFileName.m3u8`, ]; This works and output the data.but is there any possible way to tell ffmpeg to not add .TS extensions to the playlist items ? I manually update one of the playlist item in m3u8 file with some random file extension and it (...)
• 01:32
  ffmpeg ignores every framerate option, locking the result to 25 fps - Goury Newest 'ffmpeg' Questions - Stack Overflow
  ffmpeg version 3.4.8-0ubuntu0.2 Copyright (c) 2000-2020 the FFmpeg developers No matter what I do, ffmpeg just ignores everything and encodes it as if it's 25fps. -framerate 60 does nothing -t 60 does nothing -r 60 makes it to interpolate frames -r:v 60 does the same -vf "fps=60" does the same -vframes makes it to end the encoding prematurely Everything google shows seems to be outdated, including ffmpegs own (...)
• 00:27
  Heroku: [Errno 13] Permission Denied: /app/ffmpeg.exe - GetTwoBirdsStonedAtOnce Newest 'ffmpeg' Questions - Stack Overflow
  So I made a python bot and I wanted to equip it with the ability to play music. I have been following this tutorial. Unfortunately when I run the play command I get the [Errno 13] Permission Denied: /app/ffmpeg.exe error. I have included the ffmpeg.exe file in my project branch as well as all of the ffmpeg files. I host this bot on heroku. I ran heroku logs --tail but this doesn't show me anything, I see the error as the output on a discord channel. Before you suggest it, I already have ran this: heroku config:set DISABLE_COLLECTSTATIC = 1. Of course to no avail... Here's (...) -- this tutorial.
• 00:01
  How to decode a 2D video with the H264? [closed] - RyTest Newest 'ffmpeg' Questions - Stack Overflow
  Since I do not know C++ i don't want to dive into FFMPEG and need to convert/Decode a 2D with H264. Is there any easier way to decode the video without FFMPEG or with a gui?
• 14:08
  How to fix "Cannot find a valid font for the family Sans' while adding text on image using react-native-ffmpeg - coffee Newest 'ffmpeg' Questions - Stack Overflow
  I am trying to add text on image using the code below RNFFmpeg .execute(`-y -i $input -vf "drawtext=text='Hello World':fontcolor=white:fontsize=75:x=0:y=0" $output`); I am not using any custom font but still get this error. Error: [Parsed_drawtext_0 ⓐ 0x7f87a1ce40] Cannot find a valid font for the family Sans index.js:115 [AVFilterGraph ⓐ 0x7f6765e760] Error initializing filter 'drawtext' index.js:115 [AVFilterGraph ⓐ 0x7f6765e760] with args 'text=Hello World:fontcolor=white:fontsize=75:x=0:y=0' index.js:115 [AVFilterGraph (...)
• 14:25
  ffmpeg pipe livestream to ffplay - Dobbelina Newest 'ffmpeg' Questions - Stack Overflow
  I wonder if it is possible to pipe an internet livestream from ffmpeg to ffplay? Examples to illustrate: Livestream to test.mp4 works ffmpeg -i "https://Some livestream" -c copy "C:\\ffmpeg\\test.mp4" Recorded video to test.mp4 and pipe to ffplay works ffmpeg -i "https://Some recorded video" -c copy "C:\\ffmpeg\\test.mp4" -f matroska - | ffplay -fs - Livestream to test.mp4 and pipe to ffplay don't work ffmpeg -i "https://Some livestream" -c copy "C:\\ffmpeg\\test.mp4" -f matroska - | ffplay -fs - I (...)

3 March

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

• 23:25
  Efficient way to create variant playlists from mp4 for HLS - nnaj20 Newest 'ffmpeg' Questions - Stack Overflow
  I am totally new to video encoding and options, and just learned about Apple's HLS requirements. So far, I've been able to get something working for my iOS app. However, I find the entire process to be very slow and manual. Now, having to repeat this for several more locales (video translations), I can't imagine there isn't a better way. Controlling bitrate To have control over the bitrate, I use HandBrake to create a new .mp4 file with the appropriate video encoder setting, for each bitrate I want (192k, 400k, 1m, etc.). THEN, I move onto creating the (...)
• 20:39
  Convert *.hdr sequences to HDR10 videos ffmpeg - kmd999 Newest 'ffmpeg' Questions - Stack Overflow
  I have some *.hdr sequences, and I would like to convert them to HDR10 videos. I have tried using FFmpeg but FFMPEG errors that it can't find videos. ffmpeg -r 60 -i %d.hdr -pix_fmt yuv444p10le -c:v libx265 \\ -x265-params hdr-opt=1:repeat-headers=1:colorprim=bt2020:transfer=smpte2084:colormatrix=bt2020nc:max-cll=0,0 \\ -crf 25 -preset veryfast t.mp4 This is what I tried. I think this is generally the code to convert to HDR10 videos. I didn't put master-display there because I don't have information. I wonder if master-display is needed. I also (...)
• 18:44
  FFMPEG is really slow at extracting subtitles - Gustav P Svensson Newest 'ffmpeg' Questions - Stack Overflow
  I'm trying to extract the subtitles from a 1080P video, around 40min long. I'm currently using this command (using fluent-ffmpeg in node, but the translated command is this): ffmpeg -threads 3 -map 0: -c copy This command takes about 20-30 min to complete. I've searched quite a lot on how to speed up this process, if I look at my task manager I can see that ffmpeg is using 0.1% of the CPU which makes me think that it's possible to speed up this process. I'm not sure if the -threads option is actually doing anything when extracting subtitles but (...)
• 17:59
  How to extract audio from MPEG-4 file using ffmpeg [closed] - SteveS Newest 'ffmpeg' Questions - Stack Overflow
  How can we extract audio from video file (MPEG-4 format)? What is convenient form of storing the extracted audio data for further analysis? (edit: In other words: is it better to use PCM format or something like WAV if I want to get audio sound level?) From other questions about this topic I learned that ffmpeg is a right tool to do this.
• 12:32
  Losing pixels at end of the row with ffmpeg autogen - RCraveiro Newest 'ffmpeg' Questions - Stack Overflow
  I'm having an odd situation, i'm using ffmpeg autogen to decode videos and when i have a video that width % 32 different from 0 i'm loosing pixels at the end of every line. Example: video with 900x100 pixels, output is 900x100 but i lose some pixels at the end. Even with autogen tester i have this issue, video is a MPEG-4/avc1 Is this a know issue? This is whats i get with VLC This is whats i get with ffmpeg (...) -- This is whats i get with VLC, This is whats i get with ffmpeg autogen
• 09:19
  which ffmpeg api is for the cmd option "-q:v 1" by saving jpg from video [duplicate] - Tangtoo Newest 'ffmpeg' Questions - Stack Overflow
  as the theme, how can I set quality scale with ffmpeg-api. I want to extract frame from video and save it as .jpg. Maybe I should set some av_dictionory? Thanks for reading and hope you can leave some answer.
• 08:08
  Combining thousands of audios in NodeJs - Ishan Sharma Newest 'ffmpeg' Questions - Stack Overflow
  I am getting E2BIG error when combining more than 50 audios using SOX is one go. Is there a way to handle this? I wish to combine thousands of audios in one go. One solution is to make a recursive batch function using SOX but looking for a simple solution. Trying to implement this in NodeJs. Appreciate the help. Thanks.
• 08:00
  decode siren codec by using ffmpeg - Ms.Sahin Newest 'ffmpeg' Questions - Stack Overflow
  I have a siren(G722.1) pcap from wireshark website. I extracted the siren payload from the pcap but I could not decode the extracted payload to wav file by using ffmpeg. Here is how I used ffmpeg: ffmpeg -loglevel debug -y -acodec siren -i extracted_payload -b:a 24k -ar 16000 -acodec pcm16le -f wav siren.wav It gives error and says: unspecified sample rate. Also, I think there is no proper documentation of ffmpeg. I searched the problem all over the internet and found nothing. Thank (...)
• 02:54
  Transcoding with the GCP Transcoder API results in a time gap - banyan Newest 'ffmpeg' Questions - Stack Overflow
  I've been trying GCP's Transcoder API and having trouble with the time randomly becoming shorter than specified in certain cases. The specific cases are as follows: Specifying startTimeOffset and endTimeOffset (cut off 2 seconds before and after the video) fMP4 is used as container input video is mp4 with screen recording on iPad Pro For example, if I don't specify startTimeOffset and endTimeOffset, the time will not be shortened. Also, there is no problem when MPEG2-TS is specified for container. There may be a problem with the video itself, (...) -- Transcoder API, https://gofile.io/d/DUT9rr

2 March

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

• 22:27
  ffmpeg won't exit normally with SIGINT - ntstlkr Newest 'ffmpeg' Questions - Stack Overflow
  I'm trying to record video with ffmpeg and all works fine when I call stopRecord() function inside timeout: frame= 147 fps= 18 q=-1.0 Lsize= 290kB time=00:00:09.91 bitrate= 239.8kbits/s speed=1.24x video:129kB audio:156kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 2.159774% [aac ⓐ 0x55e825dbdc40] Qavg: 241.892 Exiting normally, received signal 2. SIGINT Recording process exit, code: 255, signal: null Recording stopped But ffmpeg process won't exit and stays alive when I call stopRecord() function on API (...)
• 22:06
  Create muted video and black screen video with FFmpeg - user2685832 Newest 'ffmpeg' Questions - Stack Overflow
  I'm trying to use FFmpeg to generate the following from a local mp4 file: A copy of the original video with no audio A copy of the original video with audio but without visuals (a black screen instead). This file also needs to be in mp4 format. After reading through the documentation I am struggling to get the terminal commands right. To remove the audio I have tried this command without any success: ffmpeg -i file.mp4 -map 0:0 -map 0:2 -acodec copy -vcodec copy Could anyone guide me towards how to accomplish (...)
• 21:35
  Repeating images in a ffmpeg -i %04d.png pattern - Basj Newest 'ffmpeg' Questions - Stack Overflow
  I'm making a video of 20 seconds at FPS=25, with 500 frames which are 0000.png, 0001.png, ..., 0499.png. This works: ffmpeg -framerate 25 -i images/%04d.png out.mp4 but in fact there are only a few changes in the video, in my case at frames 0000, 0122, 0288, 0312, 0450. In the meantime the PNG are identical. Problem: it's always slow to generate 500 PNG files when only 5 different files would be enough! I would like to generate only those 5 PNG files, and generate the video from them. When I try the command above with images/ containing only 0000.png, (...)
• 17:58
  FFMPEG python loop filtering H264 - Aron Latis Newest 'ffmpeg' Questions - Stack Overflow
  Is there any way in which one can opt out the loop filtering phase when decoding a H.264 encoded video? I have tried reading ffmpeg docs and looking for keywords such as loop or filtering, but nothing concludent came out of it so far.
• 17:53
  ffmpeg how to zoom out with no jiggle - Sulli Newest 'ffmpeg' Questions - Stack Overflow
  I have read that to avoid jiggling when zooming in on an image with ffmpeg a good solution is to upscale first and downscale at the end: ffmpeg -nostdin -r 25 -i input.jpg -filter_complex "scale=-2:10*ih,zoompan=z='min(zoom+0.0010,1.5)':d=125:x='iw/2-(iw/zoom/2)':y='ih/2-(ih/zoom/2)',scale=-2:720" -c:v libx264 -t 5 -pix_fmt yuv420p output.mp4 but I can't find what would be the equivalent command for zooming (...)
• 17:18
  ffmpeg with partial motion detection - Silentfury Newest 'ffmpeg' Questions - Stack Overflow
  I have video files from a static surveillance camera and I try to re-encode them using some sort of motion detection filter (keeping the movements, droping the stills) in order to save space and play time. I have successfully tried the two below filter options but it still feels not good enough.: mpdecimate e.g. -vf "mpdecimate=hi=6480:lo=6420:frac=0.1,setpts=N/(15*TB)" select (e.g. -vf "select=gt(scene,0.4)") The main problem is a moving bush in the camera view, that I would like to exclude from the motion detection. Is there other/better ways of applying (...)
• 15:59
  Hosting music bot on heroku - itsmaxplayz Newest 'ffmpeg' Questions - Stack Overflow
  I have made a discord bot on discord.py rewrite which plays music in a voice channel. The code is as follows: def search(query): with ytdl: try: requests.get(query) except: info = ytdl.extract_info(f"ytsearch:query", download=False)['entries'][0] else: info = ytdl.extract_info(query, download=False) return info, info['formats'][0]['url'] ydl_opts = 'format': 'bestaudio/best', 'quiet': True, 'postprocessors': [ 'key': (...)
• 15:13
  Change image to video with ffmpeg command - Shivangi rawat Newest 'ffmpeg' Questions - Stack Overflow
  I am trying to convert png image into an mp4 (video) file and I am getting an empty video file as an output and it shows can't open this file message during conversion. Here is my code $command1="ffmpeg -f image2 -r 1/1 -i ../input/sample_2094278659.png -vf fps=25 ../output/test2.mp4"; //command for every 1 second image change in video exec($command1); I have tried these examples also $command1="ffmpeg -loop 1 -t 5 -i ../input/imagesample.png -t 5 -i ../input/sample_2094278659.png -vf fps=25 format=yuv420p ../output/test1.mp4"; // (...)
• 13:49
  How to set output file while using subprocess.Popen and hide cmd window at the same time? - Nande Newest 'ffmpeg' Questions - Stack Overflow
  I made a simple app that can convert video files using FFMpeg. I used Kivy for UI. I used os.system() to execute ffmpeg commands but while using this method, there is always a cmd window popping up. Therefore i am trying to use subprocess.Popen() to execute ffmpeg commands but i also want to save ffmpeg output to a text file. I tried this but it didn't work: subprocess.Popen(f"ffmpeg -i path -acodec acodec output > output.txt 2>&1", creationflags = 0x08000000, stdout="output.txt") FFMpeg converts the video but there is no output.txt file. This code works with (...)
• 13:35
  Split audio files using silence detection - beero Newest 'ffmpeg' Questions - Stack Overflow
  I've more than 200 MP3 files and I need to split each one of them by using silence detection. I tried Audacity and WavePad but they do not have batch processes and it's very slow to make them one by one. The scenario is as follows: split track whereas silence 2 seconds or more then add 0.5 s at the start and the end of these tracks and save them as .mp3 BitRate 192 stereo normalize volume to be sure that all files are the same volume and quality I tried FFmpeg but no (...)
• 07:24
  How to convert videos to mp4 without stretching portrait to landscape using moviepy? [closed] - suyogx Newest 'ffmpeg' Questions - Stack Overflow
  I am trying to use Moviepy to convert videos to .mp4 format. Landscape videos have no issues. But when I input portrait ones, they get stretched to landscape. example: when i upload 1080x1920 videos, they get stretched to 1920x1080. Is there any way to disable stretching? I am only trying to convert the videos to .mp4.
• 14:17
  PHP ffmpeg Image to Video - Metin Saraç Newest 'ffmpeg' Questions - Stack Overflow
  I want to create a Video with Image in php ffmpeg. My code is as follows, $video = $ffmpeg->open('image1.jpg'); $video->filters() ->resize(new FFMpeg\\Coordinate\\Dimension(1080, 1080))->synchronize(); $format = new FFMpeg\\Format\\Video\\X264(); $format->setKiloBitrate(1000)->setAudioChannels(2)->setAudioKiloBitrate(256); $video->save($format, 'video.avi'); I want total video duration and background sound to my code, but I couldn't find a suitable solution. Can you help me?  (...)
• 11:13
  Extract bitstream from a lossless WebP file? - malat Newest 'ffmpeg' Questions - Stack Overflow
  I am interested in removing the RIFF header from a lossless WebP image. I was hoping to use ffmpeg to create the bitstream directly: % ffmpeg -i input.png -f image2 -vcodec vp8 -q:v 0 lossless.vp8 But quickly looking at the documentation, it seems the lossless mode is totally different from VP8: Lossless images are a separate codec developed by Google. ref: http://ffmpeg.org/ffmpeg-codecs.html#libwebp Are there any command line tool to remove RIFF header from an existing webp file (Debian/Linux) ? If not, can I use ffmpeg to create the (...) -- http://ffmpeg.org/ffmpeg-codecs.html#libwebp
• 11:10
  Ffmpeg libav with multiple inputs crashes when cleaning memory - Expressingx Newest 'ffmpeg' Questions - Stack Overflow
  I'm streaming multiple cameras with ffmpeg libav for (int i = 0; i Every camera is streamed to own file, having its own output AVFormatContext. Everything is working fine till the recording is ended and the memory has to be freed. And the problem is here if (InputFormatContext != null) fixed (AVFormatContext** p = &InputFormatContext) ffmpeg.avformat_close_input(p); InputFormatContext = null; If I use only 1 camera everything is fine, but if they are two the application crashes. And I don't know (...)
• 08:10
  IS SNR SCALABILITY IS POSSIBLE IN H264 , H265 OR AV1? [closed] - mavya tweenhonee Newest 'ffmpeg' Questions - Stack Overflow
  Is SNR Scalability is possible in h264, h265 or av1 ? Is there any binaries or source codes available for SNR Scalability ?
• 09:13
  HOW CAN I USE NGINX TO GENERATE ONLY .TS FORMAT? - VALANTINA Newest 'ffmpeg' Questions - Stack Overflow
  I'm using nginx for generating copies of stream chunks with ".ts" format that are encapsulated in m3u format. The issue here, is that I don't want to work with m3u format, I want to send directly and contouniesly the ts chunks to the media player(because m3u format it's not readable in so many media player) ! So, I want to know the configuration or the algorithme to work with in Nginx? Please, And thank you!
• 03:55
  FFmpeg - Slow Down Video by Half - Play Back at 2x - nomaam Newest 'ffmpeg' Questions - Stack Overflow
  I am working with the newest version of FFmpeg I am trying to slow down a video with audio by half speed, then play back that video in something like VLC at 2x speed and have the video appear and sound as if it was the original version. So far I have tried ./ffmpeg.exe -i "ffmpeg/testVideo.mp4" -filter_complex "[0:v]setpts=1.5*PTS[v];[0:a]atempo=0.5[a]" -map "[v]" -map "[a]" "ffmpeg/outputVideo.mp4" When I play back the video at 2x it isn't close to playing and sounding like the unaltered version. I have read the documentation but am having difficulty (...)
• 03:18
  FFmpeg: why avcodec_receive_frame need additional packet to get an I frame - everywill Newest 'ffmpeg' Questions - Stack Overflow
  I'm new to FFmpeg. When learn it with the nice repo(https://github.com/leandromoreira/ffmpeg-libav-tutorial)，in the hello_world example I find avcodec_receive_frame dosen't return the first I frame until it gets the third packet, as following screenshot shows: I'm wondering why additional packets are needed to receive an I frame. -- https://github.com/leandromoreira/ffmpeg-libav-tutorial,
• 03:02
  FFMPEG and MP3: equalizer filter has no effect at all - LeMartin Newest 'ffmpeg' Questions - Stack Overflow
  Practicing FFMPEG filters on MP3s was great until I got stuck here with no luck reading from FFMPEG docs or around the web: equalizer filter has no effect at all on my MP3. First I probed the file: libavutil 56. 49.100 / 56. 49.100 libavcodec 58. 89.100 / 58. 89.100 libavformat 58. 43.100 / 58. 43.100 libavdevice 58. 9.103 / 58. 9.103 libavfilter 7. 83.100 / 7. 83.100 libswscale 5. 6.101 / 5. 6.101 libswresample 3. 6.100 / 3. 6.100 libpostproc 55. 6.100 / 55. 6.100 Input #0, mp3, from '.\\cierre.mp3': Metadata:  (...)
• 00:34
  FFmpeg hangs on buffer fill c++ - Derek Halden Newest 'ffmpeg' Questions - Stack Overflow
  I'm processing a bunch of frames from an RTSP stream using ffmpeg. I end up doing a lot of processing on these frames, which means that I'm not always pulling in real-time. If the buffer gets full, the process hangs. I'm wondering if one of the following solutions is feasible/fixes the problem, and if so, how I would implement it using the ffmpeg libraries: 1) Is there a way to clear the buffer if I ever reach a point where it's hanging? (I can determine when it's hung, I just don't know what to do about it). 2) Is there a way to make the (...)
• 00:34
  Recursively scan and identify video files with FFMPEG - Jason Paul Michaels Newest 'ffmpeg' Questions - Stack Overflow
  UPDATE Thank you everyone for sharing up your suggestions. I was able to make the work properly by modifying it as follows. #!/bin/bash ROOTPATH="/Volumes/NVME-RAID/ASSET-Processing/CORRUPT-SCAN/SCAN " # manually define root path to your folder that has subfolders for subdir in *; do cd $ROOTPATH$subdir mkdir 00errors for path in *.MOV,mov,MP4,mp4; do ffmpeg -i "$path" -f null -; echo$? RC=$? if [ "$RC" -ne "0" ]; then # Do something to handle the error. mv $path ./00errors fi done cd (...)

1 March

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

• 20:14
  Get the list of I-Frames in a video using Python - Tina J Newest 'ffmpeg' Questions - Stack Overflow
  I'm trying to get the list of indexes for all I-frames in a video in Python (and later save a portion of them as JPEG). Right now, I can traverse all frames using FFProbe in terminal, and see which one is I-frame: ffprobe -select_streams v -show_frames -show_entries frame=pict_type -of csv 18s.mp4 which gives me something like this: frame,I frame,B frame,P frame,B frame,P frame,B But how can I do that in Python (I'm in Windows) and get a list of all their (...)
• 20:09
  Windows CMD Batch Script FFmpeg - Tobias Newest 'ffmpeg' Questions - Stack Overflow
  I have created a batch file (.bat) that uses FFmpeg to transcode various videos (with *.mov or *.mp4 file name extension) from an input folder to an output folder (with extension *.mkv) as batch process (Windows 10 environment). File names (without extension) from the input folder should be copied to the newly created output file names (that have the new file extension *.mkv). ⓐecho off set CMD=ffmpeg -c:v ffv1 -level 3 -g 1 -coder 1 -context 1 -pix_fmt + -slices 24 -slicecrc 1 -report -c:a pcm_s24le FOR /R input_folder %%G IN (*.mov,*.mp4) DO ( echo (...)
• 19:23
  x86 32 bit support for Accord.video.FFMPEG - Ravi Kanth Newest 'ffmpeg' Questions - Stack Overflow
  Accord version 3.8.2 I am using Accord, Accord.video, Accord.video.FFMPEG Dll's for capturing the screen, my code is compiled to ANYCPU, everything works fine in 64 bit machine, but I am facing issue when it comes to 32 bit machine below is exception which I am getting. Exception occurred while loading the assemblies Could not load file or assembly 'Accord.Video.FFMPEG.dll' or one of its dependencies. is not a valid Win32 application. (Exception from HRESULT: 0x800700C1), at System.Reflection.RuntimeAssembly.nLoadFile(String path, Evidence evidence) at (...)
• 18:46
  dynamically update image in video stream using ffmpeg - omega1 Newest 'ffmpeg' Questions - Stack Overflow
  I have the following ffmpeg command which works, but I would like image3.jpg to update every 30 seconds (image3.jpg changes every 30 seconds). I read that I needed to move the file from a .tmp file image3.jpg.tmp to image3.jpg but this is not working either. The script places a few images on screen and takes an audio stream as its input and then outputs to a RMTP server, all works except image3.jpg only updates if I stop the ffmpeg command and restart it (which I cannot do as it is a live stream). I'm also struggling with where to add a drawtext within the filter_complex (...)
• 12:36
  FFmpeg errors using pipe input instead of file input [duplicate] - Michael Werner Newest 'ffmpeg' Questions - Stack Overflow
  I try to do several conversions (e.g. codec conversion of videos, extracting single frames etc.) via FFmpeg on 64-bit Windows OS. This works fine if I use files as input for FFmpeg.exe This works: ffmpeg.exe -hide_banner -loglevel debug -i "C:\\blabla\\OA9.mp4" -deinterlace -vframes 1 -c:v bmp -f image2pipe pipe: > test1.bmp This does not work: type "C:\\blabla\\OA9.mp4" | ffmpeg.exe -hide_banner -loglevel debug -i pipe: -deinterlace -vframes 1 -c:v bmp -f image2pipe pipe: > test1.bmp It causes the following errors / warnings:  (...)
• 16:59
  fluent-ffmpeg: Convert wav to alac .m4a with streams - Johannes Klauß Newest 'ffmpeg' Questions - Stack Overflow
  On my node.js server I want to convert a wav file to apple lossless .m4a Using fluent-ffmpeg, I got this so far: const transcoder = ffmpeg(fs.createReadStream(`$__dirname/convertTest.wav`)); transcoder .withAudioCodec('alac') .addOutput(fs.createWriteStream(`$__dirname/test2.m4a`)) .run() ; But it throws me the following error: Error: ffmpeg exited with code 1: Could not write header for output file #0 (incorrect codec parameters ?): Invalid argument Error initializing output stream 0:0 -- Conversion failed! I (...)
• 18:04
  debian ffmpeg webcam streaming to remote server error - James Newest 'ffmpeg' Questions - Stack Overflow
  I have a beaglebone black that I am trying to stream live video from, to an OSX computer. The streaming client potion seems to work if I point it to a local ffserver. rootⓐbeaglebone:~# ffmpeg -f v4l2 -s 320x240 -r 30 -i /dev/video0 http://127.0.0.1:8090/feed1.ffm ffmpeg version N-78848-gf114839 Copyright (c) 2000-2016 the FFmpeg developers built with gcc 4.9.2 (Debian 4.9.2-10) configuration: --prefix=/root/ffmpeg_build --pkg-config-flags=--static --extra-cflags='-O3 -I/root/ffmpeg_build/include -mfpu=neon -mtune=cortex-a8' (...) -- https://github.com/FFmpeg/FFmpeg/blob/master/libavcodec/avcodec.h
• 16:01
  Produce an adaptive multi-resolution mpeg-dash file from an input video file - Tariq Hasan Newest 'ffmpeg' Questions - Stack Overflow
  I can produce different resolution mpeg-dash videos from running these commands separately and get one .mpd file for each of the resolutions: ffmpeg -i /path/to/input.mp4 -vf scale=1920:1080 /path/to/output.mpd ffmpeg -i /path/to/input.mp4 -vf scale=1280:720 /path/to/output.mpd ffmpeg -i /path/to/input.mp4 -vf scale=720:480 /path/to/output.mpd ffmpeg -i /path/to/input.mp4 -vf scale=640:360 /path/to/output.mpd The question is, how do I get a single .mpd file that maps to all these different resolution videos which would be adaptive in resolution when streamed over (...)
• 14:44
  Supporting HEVC/H.265 videos in Electron - Elmo Newest 'ffmpeg' Questions - Stack Overflow
  Chrome/Electron don't normally support H.265 videos. I want the user to be able to play .mov files recorded by Apple devices in my app. How can I do this? Possible approaches: Use ffmpeg to transcode to H.264 in real-time, which will be resource intensive (not ideal) Use WebAssembly to render the video in a tag (not ideal) Fork and manually add H.265 codec support to Chrome/Electron (overkill) Use a native module that renders the video in a or (...)
• 14:00
  Generate Thumbnail of Uploaded video in Laravel - Bhargav Chudasama Newest 'ffmpeg' Questions - Stack Overflow
  I am trying to create a thumbnail of the uploaded image in Laravel. but there is no particular doc for this. It's possible without the FFmpeg. I didn't want to use FFmpeg. please anyone can help on this.
• 12:17
  How to properly splice a video-blob in javascript - marks Newest 'ffmpeg' Questions - Stack Overflow
  I am recording a webcam-video through recordRTC which has an ondataavailable callback which is called every 2000 milliseconds. The ondataavailable method provides a Blob as parameter, so it will always contain the current video blob. I would like to upload the video in slices to the server while the recording is ongoing to avoid having a big file to upload in the end as one. For that, the blobs are sliced with Blob.slice(): ondataavailable(blob) // Create a new blob from last blob size to the end of the blob const sliceBlob = blob.slice(this._state.lastBlobSize, (...) -- recordRTC, Blob.slice(), FFMpeg,
• 07:49
  Increase frame rate and decrease duration of video using FFMPEG - SBiswas Newest 'ffmpeg' Questions - Stack Overflow
  Please help me out. I have a video of 0.04 frame rate and 02:46:40 duration, and I want to increase frame rate to 25fps and decrease duration to 10s-13s. I have used these commands for fps and speed respectively: ffmpeg -i input.avi -r 25 output.avi ffmpeg -i output.avi -vf "setpts=0.001*PTS" output1.avi But the final result output1.avi has distortion in it. How can I achieve my required fps and duration without any loss in my video (...)
• 06:48
  FFMPEG NVENC encoding with Windows10 - Daniel Bartley Newest 'ffmpeg' Questions - Stack Overflow
  I had to reinstall windows 10 because windows. I have this exact same code working prior to the reinstall, however after I cant get it to work. I am using the latest nvidia drivers 416.16 I have VisualStudio and Cuda Toolkit installed 2x 1080TIs Using ffmpeg 4.0.2: T:\\ffmpeg\\bin\\4.0.2\\ffmpeg.exe -c:v h264_cuvid -i "T:\\Streams\\01-ready\\2018-10-10 21-19-21.mp4" -i "T:\\Streams\\10-source\\kpg-logo.png" -filter_complex "overlay=10:10" -b:v 24000k -c:v h264_nvenc -c:a copy "T:\\Streams\\02-encoded\\2018-10-10 21-19-21_watermarked.mp4"  (...)

28 February

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

• 23:54
  FFmpeg - Create Thumbnail Grid from Videos [duplicate] - John Doe Newest 'ffmpeg' Questions - Stack Overflow
  Is it possible to create a grid of 9 videos to form one big video, then snapshot the first frame to create a thumbnail showing the first frames of all 9 videos? I wish to take the first 9 videos from a contact.txt file I started by trying with 4 videos but it still doesnt work: ffmpeg -y -ss 00:00:01 -protocol_whitelist file,pipe -f concat -safe 0 -i "concat.txt" -filter_complex "[0:v][1:v]hstack=inputs=2[top];[2:v][3:v]hstack=inputs=2[bottom];[top][bottom]vstack=inputs=2[v]" -map "[v]" -s 1280x720 "thumb.jpg" Trying to get this layout: MUST use files from (...) --
• 23:24
  problem with executing flutterFFmpeg command - Sadiq Samaila Newest 'ffmpeg' Questions - Stack Overflow
  the code below is for creating a robot voice with flutterFFmpeg so here is the code I ran String commandToExecute = "-i $aud -filter_complex 'afftfilt=real='hypot(re,im)*sin(0)':imag='hypot(re,im)*cos(0)':win_size=512:overlap=0.75' " + outputPath; _flutterFFmpeg.execute(commandToExecute).then((rc) => print( "FFmpeg process exited with rc $rc $appDocumentDir")); and I got this error E/mobile-ffmpeg( 5493): [AVFilterGraph ⓐ 0x7ce619159800] No such filter: 'im)*sin(0):imag' E/mobile-ffmpeg( (...)
• 18:42
  What's the single ffmpeg command for converting a video file to mpeg-dash format with adaptive bitrate? - Tariq Hasan Newest 'ffmpeg' Questions - Stack Overflow
  Resultant resolutions should be of 240p, 480p, 720p and 1080p. The resultant .mpd file must be a single file.
• 19:36
  FFMPEG: crop a video without losing the quality - mrana Newest 'ffmpeg' Questions - Stack Overflow
  I have mp4 video of 1920x1080. I would like to crop the video to 480x270 without quality loss. I am using the following command: ffmpeg -i input.mp4 -filter:v "crop=480:270:200:200" -crf 23 output.mp4 I also tried: ffmpeg -i input.mp4 -filter:v "crop=480:270:200:100" -c:a copy -qp 0 output.mp4 I used -crf 23 and -qp 0 for loseless video cropping, but after cropping video has lost quality. Does anyone know how I can crop the video without losing the (...)
• 19:28
  How can I tell if a video file is corrupted? FFmpeg? - A Person Newest 'ffmpeg' Questions - Stack Overflow
  I am trying to find out if a video file is corrupted or not. I am using FFmpeg to transcode a video file. However, when it gets to a file that not playable and is damaged, it stops running. I want to know if there is a way to output the FFmpeg command into a text file and then be able to tell which file is corrupted from the text file. When I run FFmpeg on one of the corrupted vide, I find this information. built with gcc 9.1.1 (GCC) 20190807 configuration: --enable-gpl --enable-version3 --enable-sdl2 --enable-fontconfig --enable-gnutls (...)
• 18:51
  ffmpeg stream loop video forward and in reverse - Andrew Mascillaro Newest 'ffmpeg' Questions - Stack Overflow
  I want to take an input video and horizontally concatenate it with itself in reverse (play it forwards then backwards) using a filter_complex. So far I have split it over 3 commands, reversing, concatenating, and streaming, but I want to do it in one command. The following streams a video twice but I don't know how to reverse the second video. How does one reverse the second copy of the video without changing the first one? ffmpeg -re -stream_loop -1 -i self_recording.mkv -filter_complex \\ "[0:v]split=2[r1][r2];[0:v][r1][0:v][r2] concat=n=4:v=1[v]" \\ -map "[v]" -f v4l2 (...)
• 20:06
  Python code to convert ffmpeg time duration value to seconds - dgasaway Newest 'ffmpeg' Questions - Stack Overflow
  I am seeking python 3.x code that can take a user-provided value in ffmpeg's time duration format and provide a float for the number of seconds represented by that duration. It would parse both formats described in the documentation and handle the s/ms/us prefix for the second format. The only thing I would not need is the optional negative. I mostly need this so I can provide the correct 'start_time' (seconds) for the fade and afade filters. Please note, I am not asking how to get the duration of an input file. These are string values provided by the (...) -- time duration format
• 17:08
  Streaming UVC capture device with FFMPEG - raymater Newest 'ffmpeg' Questions - Stack Overflow
  I would like to stream the audio and video signal from my HDMI UVC Capture device (AVerMedia ExtremeCap UVC) connected to my RPi 4 (its IP is : 192.168.1.15). So I'm using ffmpeg, my command works but in my other PC, VLC can't play the stream. I see the progress bar searching but nothing, it goes around in circles. My FFMPEG command (works) : ffmpeg -f v4l2 -i /dev/video0 -f alsa -i hw:1 -c:v h264_omx -profile:v baseline -b:v 16000k -flags:v +global_header -bsf:v dump_extra -acodec aac -b:a 384k -ac 2 -ar 44100 -f rawvideo udp://192.168.1.15:8888 In VLC (...)
• 16:42
  What's the principle of atadenoise algorithm and which function in ffmpeg source code implement the atadenoise algorithm? - hiter1996 Newest 'ffmpeg' Questions - Stack Overflow
  I cannot figure out which function in libavfilter/vf_atadenoise.c implements atadenoise in ffmpeg...
• 14:30
  Can I provide the decryption key for the FFMPEG encrypted m3u8 file externally? - Dilshan Newest 'ffmpeg' Questions - Stack Overflow
  First of all I have zero knowledge with ffmpeg and trying to understand it by using this tutorial. Once I read it I got some knowledge with ffmpeg. So now what I need to do is encrypt a mp4 file and host it somewhere ( maybe on Vimeo ) on the internet and play that encrypted file on a player on Android / windows or web player ( In a client application ) After about 3 days of research I found out that I can encrypt a video with below line of code. ffmpeg -i input.mp4 -c copy -bsf:v h264_mp4toannexb -hls_time 10 -hls_key_info_file key_info playlist.m3u8 This will (...) -- tutorial, https://www.cumulations.com/blogs/29/OfflineVideoStreaming
• 13:31
  Custom FFMpeg Build with QSV, CUDA and VAAPI that can also run on other servers and directories - Adem Aga Newest 'ffmpeg' Questions - Stack Overflow
  Since I am starting with my first build experience with FFMpeg. I want build a custom version of FFMpeg with IntelHD GPU (QSV) and Nvidia GPU (NVENC) and VAAPI support, which should also run later on other Linux (Ubuntu 18.04 and 20.04) computers with corresponding GPUs (IntelHD + GPU). So I would like to ask the following questions: Do the corresponding graphics cards (IntelHD and Nvidia) have to be available on the server where i want compile FFMpeg and do their drivers have to be installed? Or is it not necessary ? If the graphics card drivers have to be (...)
• 13:16
  Remove terminal opened by ffmpeg-python - Omid Ki Newest 'ffmpeg' Questions - Stack Overflow
  I have this program that combines audio and video together and for that I use ffmpeg and ffmpeg-python. The program works really well but when I try to make an exe version, naturally, it pops up a terminal and shows the ffmpeg functioning. I saved the file as .pyw instead of .py so that no window will pop up but it still happens. I also saw another post on how to make the terminal disappear in subprocess but I am using ffmpeg-python and cannot control how subprocess is used unless I modify the source which I do not intend to. Is there anyway to make the terminal window disappear without (...)
• 12:50
  Generating timestamps in webm transport stream with ffmpeg - Vlad Feinstein Newest 'ffmpeg' Questions - Stack Overflow
  I am recording screen capture of my Electron app to a file, as suggested here: Save captured video to file in Electron It works great, but the file is a “transport stream”. I can play it in Chrome browser, but can’t adjust the time slider. The suggestion was to use ffmpeg to post-process the file. The simplest, straight-forward command I found is: ffmpeg -fflags +genpts -i in.webm out.webm I thought that this simply generates timestamps. However, the out.webm file is 15 times smaller than in.webm! I don’t see any change in the quality. The downside is - the (...)
• 12:37
  FFMPEG script to merge all files in a list and make a 1920x1080p 60fps mp4 video - BitBit Newest 'ffmpeg' Questions - Stack Overflow
  I have a list of 46 videos in a text file. I tried the concat method to merge all of them, which worked but the quality is very poor and the audio is bugged/missing at parts. Can someone please help me with a script to merge all 46 videos and the output to be 1920x1080 60fps mp4 video?
• 10:23
  How run 2 script python in same time? - FoxFr Newest 'ffmpeg' Questions - Stack Overflow
  I explain my need : i wish to run ffmpeg with a python script (that's ok) but i need to know of the script is launched with a blink led connected on the GPIO of my RPI, But i dont know why i can launch my script and start le blink (or just a led on) Can u help me ? show me the light, please ;) import RPi.GPIO as GPIO import time import os GPIO.setwarnings(False) GPIO.setmode(GPIO.BCM) GPIO.setup(4, GPIO.OUT) GPIO.setup(22,GPIO.IN) # fonction qui fait clignoter la led def blink(led): GPIO.output(led,True)  (...)
• 10:10
  problem with creating a robot voice with flutterFFmpeg - Sadiq Samaila Newest 'ffmpeg' Questions - Stack Overflow
  so here is the code I ran String commandToExecute = "-i $aud -filter_complex 'afftfilt=real='hypot(re,im)*sin(0)':imag='hypot(re,im)*cos(0)':win_size=512:overlap=0.75' " + outputPath; _flutterFFmpeg.execute(commandToExecute).then((rc) => print( "FFmpeg process exited with rc $rc $appDocumentDir")); and I got this error E/mobile-ffmpeg( 5493): [AVFilterGraph ⓐ 0x7ce619159800] No such filter: 'im)*sin(0):imag' E/mobile-ffmpeg( 5493): Error initializing complex filters. E/mobile-ffmpeg( 5493): (...)
• 06:31
  High time delay: using ffmpeg to open camera and ffplay to play - hgwd Newest 'ffmpeg' Questions - Stack Overflow
  I'm working on a project which using ffmpeg to open camera and ffplay to play, but ffplay always have a high time delay which really confused me. These are my commands: ffmpeg -f avfoundation -s 1280x720 -r 30 -i 0 -pix_fmt yuv420p -f h264 -vf scale=640:360 udp://127.0.0.1:4000 ffplay udp://127.0.0.1:4000 My environment: OS: macOS Catalina 10.15.7 CPU: 2.3GHz two Intel Core i5 Memory: 8GB Is anyone can help me? (...)
• 00:59
  raspberrypi with Canon over network - Troy Robinson Newest 'ffmpeg' Questions - Stack Overflow
  Been trying to solve this for a few days. This is one of my first questions so please try not to chew my head off. It's got alot of bone in it anyways. I've got a Pi3 connected via USB to a Canon M100, works perfectly using gphoto. What I'm trying to do is get some live view - previewing going on over my network. Code I run on the Pi gphoto2 --stdout --capture-movie | ffmpeg -i - -vcodec mjpeg -pix_fmt yuv420p -threads 0 -f v4l2 /dev/video0 | cvlc v4l2:///dev/video --sout '#transcodevcodec=mjpeg,vb=800,acodec=none:rtpsdp=rtsp://:8554/' Everything up (...)

27 February

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

• 21:14
  How to get best audio quality on music bot using discord.py? - user28606 Newest 'ffmpeg' Questions - Stack Overflow
  I've built a discord music bot in discord.py but for some reason, it doesn't play music in as high quality as Fredboat or Rythm(so I don't think voice chat's bitrate is the problem). I've tried a couple of things online. The only thing that improved quality a little bit was downloading the song before playing it. But the quality was still far from anything like Fredboat's. It's also very impractical since downloading a 1h song takes a while and is space consuming. I'm interested in how to fix this and the explanation for why this is (...)
• 20:17
  How to have all the images in a folder stacked on top of each other in ffmpeg? - Antsy Newest 'ffmpeg' Questions - Stack Overflow
  I have a folder that contains nothing but images named 1.jpg - 484.jpg. Is there a simple way to have all the images stacked on top each other in one long image in ffmpeg? (preferably with one command) I've searched for this thing a bunch of times but I haven't found the answer I was looking for. Thanks in advance!
• 19:24
  electron ffmpeg mas build "Illegal instruction: 4" - Martin Newest 'ffmpeg' Questions - Stack Overflow
  I am trying to release an electron app on the Mac Apple Store (mas), my electron app uses ffmpeg to render videos. In order to release my app on the mac apple store, It needs to be sandboxed, and by default ffmpeg makes calls to external libraries so I need to statically build ffmpeg and package it with my app. My code is on the 'mas-ffmpeg-fix' branch: https://github.com/MartinBarker/digify/tree/mas-ffmpeg-fix My static ffmpeg build works before I build my app, but after running electron-builder build --mac, the ffmpeg executable now fails with Illegal instruction: 4  (...) -- https://github.com/MartinBarker/digify/tree/mas-ffmpeg-fix, view .sh file here
• 18:39
  Run bat files sequentially (?) [duplicate] - RewossKy Newest 'ffmpeg' Questions - Stack Overflow
  With FFmpeg, I divide 1 video into 675 parts, this process can take a long time depending on the video quality. There are slowdowns towards the middle of the process. I think I'm experiencing freezes because the cpu cache is full. For this, I divided the process in two and added the codes to 2 separate bat files. All I want is to run the 2.bat file after the 1.bat file is running and finished. start 1.bat start 2.bat exit When I do this way, the 2bat file is running at the same (...)
• 18:02
  Hide ffmpeg's console window when running YoutubeDL in GUI application - Božo Stojković Newest 'ffmpeg' Questions - Stack Overflow
  I'm developing a basic application which can download YouTube videos. Throughout the development, I had several quirks, including issues with formats. I decided to use a hopefully foolproof format syntax that youtube-dl will happily download for me in almost any case. Part of my YoutubeDL options look like this: self.ydl_opts = 'format': 'bestvideo[ext=mp4]+bestaudio[ext=m4a]/best[ext=mp4]/best', 'quiet': True, 'progress_hooks': [self.ydl_progress], 'outtmpl': (...)
• 17:39
  Using ffmpegtoolkit, how can I add audio to an existing video - Neil Highley Newest 'ffmpeg' Questions - Stack Overflow
  I've managed to merge video streams together using FFMediaToolkit 4.01, but I am unable to Add Audio using yodadude2003's update to ffmpegtoolkit. Here is my sample code: //AudioStream[0] //SampleFormat:SingleP //SampleRate:44100 //SamplesPerFrame:1152 var timespanPerFrame=new TimeSpan(0,0,0,0,1000/settings.Framerate); using(MediaOutput file = MediaBuilder.CreateContainer(exportLocation) .WithVideo(settings) .WithAudio(audiosettings) .Create()) for(var i=0;i And I get the following exception on the (...) -- FFMediaToolkit 4.01, yodadude2003, update to ffmpegtoolkit
• 13:03
  How to record from webcam using ffmpeg with precise time information of when it was taken? - Trac3rZ Newest 'ffmpeg' Questions - Stack Overflow
  I need to record from my 2 webcams and output each frame recorded into images. An additional requirement is I need the time when the image is captured (it has to be precise up to around 10 milliseconds) Things I've tried: ffmpeg -y -f video4linux2 -r $frame_rate -i /dev/video0 -vframes 100 -strftime 1 cam0_"%H-%M-%S".png & ffmpeg -y -f video4linux2 -r $frame_rate -i /dev/video1 -vframes 100 -strftime 1 cam1_"%H-%M-%S".png This is only good up to a second, so if 2 images are taken within 1 second, 1 is overwritten. for i in [1..100] ffmpeg -y -f (...)
• 10:11
  How to find currently streaming file in ffmpeg stream that uses a file list - DigitalDisaster Newest 'ffmpeg' Questions - Stack Overflow
  I am using ffmpeg to stream to an RTMP server. I am using the option to provide ffmpeg a text file with a list of files to stream. My file looks like this: ffconcat version 1.0 file 'stream_file1.flv' file 'stream_file2.flv' file 'stream_file3.flv' It loops through these files while streaming. Is there a way to programmatically find out when ffmpeg switches between each file? Either from ffmpeg dumping some logs that I can injest, or by using python to check the state of the stream every (...)
• 10:11
  FFMpeg; Error when mixing two audio stream - Ali Esmailpor Newest 'ffmpeg' Questions - Stack Overflow
  I'm recording two stream by ffmpeg with this command: ffmpeg -protocol_whitelist pipe,udp,rtp -fflags +genpts -f sdp -i pipe:0 \\ -map 0:v:0 -c:v copy \\ -filter_complex \\ "[0:a:0]volume=0.5[a0]; \\ [0:a:1]volume=0.5[a1]; \\ [a0][a1]amerge=inputs=2,pan=stereo|c0 that [0:v:0] is my video stream and [0:a:0] and [0:a:1] are my audio streams that I want to mix them up and record it associate with video stream. But unfortunately, I get this ugly error sometimes that it causes silence in final video. I mean, when I get this error my final video becomes (...)
• 08:52
  Add watermark to a video using ffmpeg in python - AlphaWolf Newest 'ffmpeg' Questions - Stack Overflow
  I want to add watermark for my video, with ffmpeg i found command: ffmpeg -i input.mp4 -i watermark.png -filter_complex "overlay=1500:1000" output.mp4 But it run in cli, not in python code(i cannot found). So have anyway to embbeded it to python code(not call in subprocess)? edit: i found pyffmpeg but no guide to use it too.
• 08:13
  FFMPEG: Too many packets buffered for output stream 0:1 - Der Micha Newest 'ffmpeg' Questions - Stack Overflow
  I want to add a logo to a video using FFMPEG. I encountered this error: "Too many packets buffered for output stream 0:1.", "Conversion Failed.". I tried with diffent pictures and videos, always got the same error. Google didn't help much either. I found a thread C:\\Users\\Anwender\\OneDrive - IT-Center Engels\\_Programmierung & Scripting\\delphi\\_ITCE\\Tempater\\Win32\\Debug\\ffmpeg\\bin>ffmpeg ^ Mehr? -i C:\\Users\\Anwender\\Videos\\CutErgebnis.mp4 ^ Mehr? -i C:\\Users\\Anwender\\Pictures\\pic.png ^ Mehr? -filter_complex "overlay=0:0" ^ Mehr? (...)

26 February

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

• 18:08
  FFMPEG randomly gets killed with SIGKILL on fluent-ffmpeg - jaimish11 Newest 'ffmpeg' Questions - Stack Overflow
  I'm working on an Electron app with a Node backend and a React frontend. I'm using fluent-ffmpeg to stream data from an external RTSP feed and render the feed on my app. The feed renders and displays fine but it's randomly killed after a few minutes. (sometimes within seconds, it's unreliable) This is the error message I get: Error: ffmpeg was killed with signal SIGKILL I printed out the stderr variable within one of the library's core files and this is the error that is thrown whenever a SIGKILL occurs: [rtsp ⓐ 0x7fc9ad80be00] RTP: missed 1 (...)
• 14:04
  FFmpeg stream stops after a certain time - Anarno Newest 'ffmpeg' Questions - Stack Overflow
  We have a little Nodejs app, which starts a stream process, with a child_process.spawn. On the client-side, we have an HTML5-canvas element, which records the video data new MediaRecorder(canvas.captureStream(30), config), then this client sends its data to our Nodejs server over a WebSocket connection. We using FFmpeg for video encoding and decoding, then we send the data to our 3-rd party service (MUX), which accepts the stream and broadcasts them. Sadly the process continuously loses its fps, and after in general 1 minute, stops with an interesting error code. (when we save the video (...)
• 13:31
  Couldn't find ffmpeg or avconv on linux server - Văn Hoàng Nguyễn Newest 'ffmpeg' Questions - Stack Overflow
  I installed ffmpeg and pydub successfully on my linux server. And test with python environment ok. But when i running my code on nginx + gunicorn + django, its alert with error /home/www/env/lib64/python3.8/site-packages/pydub/utils.py:170: RuntimeWarning: Couldn't find ffmpeg or avconv - defaulting to ffmpeg, but may not work Someone can help me ? --
• 11:55
  Unknown encoder 'libx265' - user42 Newest 'ffmpeg' Questions - Stack Overflow
  I'm running the following command on my Ubuntu 20.04 ffmpeg -i input.mp4 -vcodec libx265 -crf 28 -f mp4 output.mp4 I get the statement: Unknown encoder 'libx265' I installed the encoder with the command sudo apt-get install libx265-dev libnuma-dev but I still get the same message. Do you know what I am doing wrong or how to get ffmpeg to work with this encoder?
• 11:35
  I need command to overlay video at specied time - Norman Nye Newest 'ffmpeg' Questions - Stack Overflow
  I have two video, one length video (main) and other 6 second length (bg). I want to overlay bg over main after every 20 second. I try some ways but after bg run, video stop or if it can run it show bg only one time and no more loop. ffmpeg -y -i "input.*" -stream_loop -1 -i bg.mp4 -filter_complex "[0:v]scale=1280:720[v0];[1:v]scale=1280:720[v1];[v0][v1]overlay=enable='lt(mod(t,20),6)':shortest=1" -vcodec libx264 -pix_fmt yuv420p -b:v 3000k -acodec libmp3lame -b:a 128k -ar 44100 -r 20 -ac 2 -threads 0 -shortest -preset superfast "output.mp4" Please help (...)
• 11:09
  merge/combine two FFMPEG commands together into one command - Mayank Thapliyal Newest 'ffmpeg' Questions - Stack Overflow
  I have been processing videos for a while and I have been using ffmpeg to make my life easy. But there are two commands which I want to combine into single command:- Step 1:- Divide a video vertically into two parts and then stack them horizontally ffmpeg -i usa.mp4 -filter_complex "[0]crop=iw:ih/2:0:0[top];[0]crop=iw:ih/2:0:oh[bottom];[top][bottom]hstack" -preset fast -c:a copy usa$.mp4 Step 2:- Combine 3 videos into single video (the video from Step 1 will be in between the start.mp4 and end.mp4) ffmpeg -i start.mp4 -i usa$.mp4 -i end.mp4 -vsync 2 -filter_complex (...)
• 07:20
  How can we merge two video in which one is horizontal resolution and other one is vertical resolution without stretching it using ffmpeg? - Rohan Patil Newest 'ffmpeg' Questions - Stack Overflow
  I want to make an application that merge two video, in which one video is of vertical resolution and other one is of horizontal resolution. I managed to merge but it leads to stretching of video which ideally shouldn't happen. Does anyone have any idea to do this? Thank you! command = new String[]"-y", "-i", video1.mp4, "-i", video2.mp4,"-strict", "experimental", "-filter_complex", "[0:v]scale=1920x1080,setdar=4:3[v0];[1:v]scale=1920x1080,setdar=4:3[v1];[v0][0:a][v1][1:a] concat=n=2:v=1:a=1", "-ab", "48000", "-ac", "2", "-ar", "22050", "-s", "1920x1080", "-vcodec", (...)
• 06:57
  Trimming batch of videos using timestamp - Raghav Arora Newest 'ffmpeg' Questions - Stack Overflow
  I want to cut multiple videos in folder based on their starting and ending time which is stored in a csv file: annotations.csv The format of the csv file is: video_name | starting time | ending time I think the pseudo code may look something like this: `for i in video_names do: cut video according to time frame` ffmpeg -ss 00:01:00 -i input.mp4 -to 00:02:00 -c copy output.mp4 This is something I found for a single video while hardcoding the input names and start and end time. How can I make this dynamic to correspond with my annotations (...)
• 06:52
  Cannot use Mobile FFmpeg and LibVLCSharp together in Xamarin.Forms project - Travis P Newest 'ffmpeg' Questions - Stack Overflow
  I am adding video stream capture functionality to a Xamarin Forms project. I am trying to use VLC's LibVLCSharp.Forms (https://github.com/videolan/libvlcsharp) package and the Mobile ffmpeg Xamarin wrapper package, Laerdal.Xamarin.FFmpeg.* (https://github.com/Laerdal/Laerdal.Xamarin.FFmpeg.iOS). However, the internal ffmpeg library from VLC is conflicting with the ffmpeg wrapper and is built with different flags which exclude functionality that I need. For native development, it looks like you can configure a preferred library with the OTHER_LDFLAGS flag in the (...) -- https://github.com/videolan/libvlcsharp, https://github.com/Laerdal/Laerdal.Xamarin.FFmpeg.iOS, https://github.com/tanersener/mobile-ffmpeg/wiki/Using-Multiple-FFmpeg-Implementations-In-The-Same-iOS-Application
• 05:43
  How do I receive buffered files or streams from the fluent-ffmpeg module? - yahoo2344 Newest 'ffmpeg' Questions - Stack Overflow
  Logic was created to replace gif files with mp4 files. However, after saving the gif file to the server, the file is imported and converted to an mp4 file, the mp4 file is saved to the server and the file is read to return the buffer. Here's a question. When I recall files from the fmpeg module, can I receive them in a buffer or stream instead of a path? Is there a way to receive the converted file as a buffer or stream without saving it? return new Promise((resolve, reject) => fs.writeFile(path.join(__dirname, `input.gif`), file, (err) => (...)
• 03:00
  FFmpeg: Concatenate .webm files some are video only some audio only some with both - Lenny Linus Newest 'ffmpeg' Questions - Stack Overflow
  In my case I have 3 .webm files the first one is audio only, the second one is video only, the third one is audio and video. I want to concatenate them into a single file which shows black screen for audio only parts, video for video only parts, and plays both for the parts that have audio and video. The video codec is VP8, the audio codec is Opus. concat.txt contains the entries for the three files I am using the following command to concatenate them. ffmpeg -f concat -safe 0 -i ./concat.txt -c copy -y output.webm This command creates the output file, (...)
• 02:26
  Create Panorama from Non-Sequential Video Frames - M.Innat Newest 'ffmpeg' Questions - Stack Overflow
  There is a similar question (not that detailed and no exact solution). I want to create a single panorama image from video frames. And for that, I need to get minimum non-sequential video frames at first. A demo video file is uploaded here. What I Need A mechanism that can produce not-only non-sequential video frames but also in such a way that can be used to create a panorama image. A sample is given below. As we can see to create a panorama image, all the input samples must contain minimum overlap regions to each other otherwise it can not be done. So, if I (...) -- here, , above, video instruction,
• 01:39
  Increase volume on multiple files - Reckless Velociraptor Newest 'ffmpeg' Questions - Stack Overflow
  Let say I have a couple of hundreds mp3 files. How do I increase volume in all of them with ffmpeg? This is for single file: ffmpeg -i input.mp3 -filter:a "volume=1.5" output.mp3 And what about multiple files with one command?