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• Record Desktop Audio, Microphone Audio, and Desktop Video with FFMPEg [closed]

  16 juillet 2022, par Mypantsrtooobig

  I have a personal project where I am trying to use FFmpeg as a custom screen recorder on my computer.

  


  I managed to make a command that records my microphone audio and desktop video and a different one to record my desktop video and audio but not one that does all three.

  


  ffmpeg -f gdigrab -video_size 1360x768  -i desktop -f dshow -i audio="virtual-audio-capturer" -i audio="Microphone (Logitech G432 Gaming Headset)"  D:\Untitled\attempt.mkv


  


  If my idea is not possible can I make a command that can record all three at the same time and merge them into one .mp4 file ?
this is the command that I would think to work but it does not.
I would appreciate any help, thank you.

  


• Random Weird HLS generation with ffmpeg

  16 août 2022, par user15006279

  I am doing some live streaming setup for my personal project and I noticed that sometime ffmpeg will not generate any hls auto it was running. I copied the same command and run in shell and it was generating HLS files successfully but somehow it was not generating with nginx.

  


  Enter image description here

  


  

  


  The more weird thing is that if i restart nginx for like a couple of times, it will regenerate. I am only playing youtube video from browser somehow ffmpeg process is not generating hls. Even after a couple of restarts, it will generate sometimes but its random. Mostly not generating at all. Can you guys help me with it ?

  


  image

  


  

  


• FFMPEG sidechaincompress error initializing complex filters with invalid argument

  15 août 2022, par DevDevRun

  I am using FFMPEG to convert process various audio files.
When using the sidechaincompress filter, I found this command line to work on my personal Windows 10 machine but not working anymore on our Debian server.
Maybe this command is not working anymore on newer version, or am I missing something (a «’» in the commande line, or a package ?) on our Linux server ? We definitely need to use this sidechaincompress filter with two audio files « Assets » and « Main ».

  


  Here is the command we run :

  


  FFMPEG -i /var/asset.flac -i /var/main.flac -filter_complex "[1:a]asplit=2[sc][mix];[0:a][sc]sidechaincompress=threshold=0.05:ratio=11:release:3000[compr];[compr][mix]amix=normalize=0" /var/sidechain.flacs


  


  Linux version : ffmpeg version 4.3.4-0+deb11u1

  


  and it returns :

  


  ffmpeg version 4.3.4-0+deb11u1 Copyright (c) 2000-2021 the FFmpeg developers
  built with gcc 10 (Debian 10.2.1-6)
  configuration: --prefix=/usr --extra-version=0+deb11u1 --toolchain=hardened --libdir=/usr/lib/x86_64-linux-gnu --incdir=/usr/include/x86_64-linux-gnu --arch=amd64 --enable-gpl --disable-stripping --enable-avresample --disable-filter=resample --enable-gnutls --enable-ladspa --enable-libaom --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libcdio --enable-libcodec2 --enable-libdav1d --enable-libflite --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-libgme --enable-libgsm --enable-libjack --enable-libmp3lame --enable-libmysofa --enable-libopenjpeg --enable-libopenmpt --enable-libopus --enable-libpulse --enable-librabbitmq --enable-librsvg --enable-librubberband --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libsrt --enable-libssh --enable-libtheora --enable-libtwolame --enable-libvidstab --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx265 --enable-libxml2 --enable-libxvid --enable-libzmq --enable-libzvbi --enable-lv2 --enable-omx --enable-openal --enable-opencl --enable-opengl --enable-sdl2 --enable-pocketsphinx --enable-libmfx --enable-libdc1394 --enable-libdrm --enable-libiec61883 --enable-chromaprint --enable-frei0r --enable-libx264 --enable-shared
  libavutil      56. 51.100 / 56. 51.100
  libavcodec     58. 91.100 / 58. 91.100
  libavformat    58. 45.100 / 58. 45.100
  libavdevice    58. 10.100 / 58. 10.100
  libavfilter     7. 85.100 /  7. 85.100
  libavresample   4.  0.  0 /  4.  0.  0
  libswscale      5.  7.100 /  5.  7.100
  libswresample   3.  7.100 /  3.  7.100
  libpostproc    55.  7.100 / 55.  7.100
Input #0, flac, from '/var/asset.flac':
  Metadata:
    encoder         : Lavf59.25.100
  Duration: 00:02:33.65, start: 0.000000, bitrate: 760 kb/s
    Stream #0:0: Audio: flac, 44100 Hz, stereo, s32 (24 bit)
Input #1, flac, from '/var/2-main.flac':
  Metadata:
    encoder         : Lavf58.45.100
  Duration: 00:02:33.65, start: 0.000000, bitrate: 1093 kb/s
    Stream #1:0: Audio: flac, 44100 Hz, stereo, s32 (24 bit)
[sidechaincompress @ 0x5622749721c0] [Eval @ 0x7fff94caf520] Undefined constant or missing '(' in 'release'
[sidechaincompress @ 0x5622749721c0] Unable to parse option value "release"
[sidechaincompress @ 0x5622749721c0] Value 3000.000000 for parameter 'mode' out of range [0 - 1]
[sidechaincompress @ 0x5622749721c0] [Eval @ 0x7fff94caf550] Undefined constant or missing '(' in 'release'
[sidechaincompress @ 0x5622749721c0] Unable to parse option value "release"
[sidechaincompress @ 0x5622749721c0] Error setting option level_in to value release.
[Parsed_sidechaincompress_1 @ 0x5622749720c0] Error applying options to the filter.
[AVFilterGraph @ 0x56227493ea40] Error initializing filter 'sidechaincompress' with args 'threshold=0.05:ratio=11:release:3000'
Error initializing complex filters.
Invalid argument