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• FFMPEG Queue input backward in time

  2 avril 2022, par Spartan 117

  I am trying to combine two audio files, and delaying the second one. Here's my command

  


  ffmpeg -i RTb295d0534191e1acb22a45bb971a12e6.mka -i RT103bfe5f4b129860f69cd8e820f3a10b.mka -filter_complex "[1:a]adelay=13500s:all=1[apad]; [0:a][apad]amix=inputs=2:weights=1|1[aout]" -map [aout] combined_audio.mka


  


  Here is the output that i'm getting, and it's causing an issue where the second audio is delayed by 5 hours and 45 minutes rather than 3 hours and 45 minutes

  


   ffmpeg -i RTb295d0534191e1acb22a45bb971a12e6.mka -i RT103bfe5f4b129860f69cd8e820f3a10b.mka -filter_complex "[1:a]adelay=13500s:all=1[apad]; [0:a][apad]amix=inputs=2:weights=1|1[aout]" -map [aout] combined_audio.mka
ffmpeg version n5.0-4-g911d7f167c-20220311 Copyright (c) 2000-2022 the FFmpeg developers
  built with gcc 11.2.0 (crosstool-NG 1.24.0.533_681aaef)
  configuration: --prefix=/ffbuild/prefix --pkg-config-flags=--static --pkg-config=pkg-config --cross-prefix=x86_64-w64-mingw32- --arch=x86_64 --target-os=mingw32 --enable-gpl --enable-version3 --disable-debug --disable-w32threads --enable-pthreads --enable-iconv --enable-libxml2 --enable-zlib --enable-libfreetype --enable-libfribidi --enable-gmp --enable-lzma --enable-fontconfig --enable-libvorbis --enable-opencl --disable-libpulse --enable-libvmaf --disable-libxcb --disable-xlib --enable-amf --enable-libaom --enable-avisynth --enable-libdav1d --enable-libdavs2 --disable-libfdk-aac --enable-ffnvcodec --enable-cuda-llvm --enable-frei0r --enable-libgme --enable-libass --enable-libbluray --enable-libmp3lame --enable-libopus --enable-librist --enable-libtheora --enable-libvpx --enable-libwebp --enable-lv2 --enable-libmfx --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenh264 --enable-libopenjpeg --enable-libopenmpt --enable-librav1e --enable-librubberband --enable-schannel --enable-sdl2 --enable-libsoxr --enable-libsrt --enable-libsvtav1 --enable-libtwolame --enable-libuavs3d --disable-libdrm --disable-vaapi --enable-libvidstab --enable-vulkan --enable-libshaderc --enable-libplacebo --enable-libx264 --enable-libx265 --enable-libxavs2 --enable-libxvid --enable-libzimg --enable-libzvbi --extra-cflags=-DLIBTWOLAME_STATIC --extra-cxxflags= --extra-ldflags=-pthread --extra-ldexeflags= --extra-libs=-lgomp --extra-version=20220311
  libavutil      57. 17.100 / 57. 17.100
  libavcodec     59. 18.100 / 59. 18.100
  libavformat    59. 16.100 / 59. 16.100
  libavdevice    59.  4.100 / 59.  4.100
  libavfilter     8. 24.100 /  8. 24.100
  libswscale      6.  4.100 /  6.  4.100
  libswresample   4.  3.100 /  4.  3.100
  libpostproc    56.  3.100 / 56.  3.100
Input #0, matroska,webm, from 'RTb295d0534191e1acb22a45bb971a12e6.mka':
  Metadata:
    encoder         : GStreamer matroskamux version 1.16.2
    creation_time   : 2022-03-23T21:20:27.000000Z
  Duration: 03:45:00.47, start: 0.291000, bitrate: 19 kb/s
  Stream #0:0(eng): Audio: opus, 48000 Hz, stereo, fltp (default)
    Metadata:
      title           : Audio
Input #1, matroska,webm, from 'RT103bfe5f4b129860f69cd8e820f3a10b.mka':
  Metadata:
    encoder         : GStreamer matroskamux version 1.16.2
    creation_time   : 2022-03-24T01:05:30.000000Z
  Duration: 02:45:03.51, start: 13502.587000, bitrate: 5 kb/s
  Stream #1:0(eng): Audio: opus, 48000 Hz, stereo, fltp (default)
    Metadata:
      title           : Audio
Stream mapping:
  Stream #0:0 (opus) -> amix
  Stream #1:0 (opus) -> adelay:default
  amix:default -> Stream #0:0 (libvorbis)
Press [q] to stop, [?] for help
Output #0, matroska, to 'combined_audio.mka':
  Metadata:
    encoder         : Lavf59.16.100
  Stream #0:0: Audio: vorbis (oV[0][0] / 0x566F), 48000 Hz, stereo, fltp
    Metadata:
      encoder         : Lavc59.18.100 libvorbis
[libvorbis @ 00000229f8a7bbc0] Queue input is backward in time
[libvorbis @ 00000229f8a7bbc0] Queue input is backward in time231x
[libvorbis @ 00000229f8a7bbc0] Queue input is backward in time184x
[libvorbis @ 00000229f8a7bbc0] Queue input is backward in time189x
[libvorbis @ 00000229f8a7bbc0] Queue input is backward in time223x
[libvorbis @ 00000229f8a7bbc0] Queue input is backward in time275x
[libvorbis @ 00000229f8a7bbc0] Queue input is backward in time245x
[libvorbis @ 00000229f8a7bbc0] Queue input is backward in time213x
[libvorbis @ 00000229f8a7bbc0] Queue input is backward in time209x
[libvorbis @ 00000229f8a7bbc0] Queue input is backward in time208x
[libvorbis @ 00000229f8a7bbc0] Queue input is backward in time204x
[libvorbis @ 00000229f8a7bbc0] Queue input is backward in time199x
[libvorbis @ 00000229f8a7bbc0] Queue input is backward in time193x
[libvorbis @ 00000229f8a7bbc0] Queue input is backward in time185x
[libvorbis @ 00000229f8a7bbc0] Queue input is backward in time181x
[libvorbis @ 00000229f8a7bbc0] Queue input is backward in time178x
[libvorbis @ 00000229f8a7bbc0] Queue input is backward in time177x
[libvorbis @ 00000229f8a7bbc0] Queue input is backward in time176x
[libvorbis @ 00000229f8a7bbc0] Queue input is backward in time169x
[libvorbis @ 00000229f8a7bbc0] Queue input is backward in time167x
[libvorbis @ 00000229f8a7bbc0] Queue input is backward in time163x
[libvorbis @ 00000229f8a7bbc0] Queue input is backward in time146x
[libvorbis @ 00000229f8a7bbc0] Queue input is backward in time139x
size=   75141kB time=06:07:52.57 bitrate=  27.9kbits/s speed= 130x
video:0kB audio:70470kB subtitle:0kB other streams:0kB global headers:4kB muxing overhead: 6.628071%


  


  The audio files being mixed together - https://www.easyupload.io/m/durisk

  


  How can i resolve this issue ?

  


• ffmpeg extracting frames from a 60 fps video

  15 juillet 2022, par ggt bnd

  I would like to extract frames from a 60 fps video, all of them I used the ffmpeg code
sevral times on lower fps videos
' ffmpeg -i test.mp4 -qscale:v 1 -qmin 1 -qmax 1 -vsync 0 tmp_frames/frame%08d.jpg "
and it works just fine, knowing that the default fps is 24
how can I change it so it extract at 60 fps
ffmpeg version " ffmpeg-2022-07-06-git-03d81a044a-full_build "

  


• Strange problem with inotifywait, while do and ffmpeg

  27 juillet 2022, par cluelessdev

  Linux Mint 20.3 up to date.
I'd like to convert and rename with ffmpeg some files which appear in a folder.
When not using the ffmpeg line everything works fine (note ffmpeg is commented out here)
`

  


  #!/bin/bash
rm flist.txt
watchdir=/media/mark/d1d75ed6-f3a5-433b-9090-d95191275f6c/download/camera/
startdate=54
starttime=32
while read -r fullpath 
do
    echo "fullpath '$fullpath'" >> flist.txt
        lenght=${#fullpath}
    echo 'lenght ' $lenght >> flist.txt 
    basedate=${fullpath:lenght-startdate:4}${fullpath:lenght-startdate+5:2}${fullpath:lenght-startdate+8:2}
    basetime=${fullpath:lenght-starttime:2}${fullpath:lenght-starttime+3:2}${fullpath:lenght-starttime+6:2} 
    echo basedate "'$basedate'" >> flist.txt
    echo basetime "'$basetime'" >> flist.txt
    newfilename="/media/mark/d1d75ed6-f3a5-433b-9090-d95191275f6c/download/test2/recordings-convert/"$basedate"-"$basetime"-doorcam".mkv
    # ffmpeg -y -i $fullpath -c:v copy -movflags +faststart $newfilename &> /dev/null
done < <(inotifywait -m -r "$watchdir" --format '%w%f' -e create -e moved_to | grep '\.dav$' --line-buffered)


  


  This does produce the desired result without ffmeg conversion :

  


  $cat flist.txt
fullpath '/media/mark/d1d75ed6-f3a5-433b-9090-d95191275f6c/download/camera/2022-06-11/001/dav/00/00.01.33-00.01.55[M][0@0][0].dav'
lenght  119
basedate '20220611'
basetime '000133'
fullpath '/media/mark/d1d75ed6-f3a5-433b-9090-d95191275f6c/download/camera/2022-06-11/001/dav/00/00.29.26-00.29.48[M][0@0][0].dav'
lenght  119
basedate '20220611'
basetime '002926'
fullpath '/media/mark/d1d75ed6-f3a5-433b-9090-d95191275f6c/download/camera/2022-06-11/001/dav/00/00.33.09-00.33.32[M][0@0][0].dav'
lenght  119
basedate '20220611'
basetime '003309'
fullpath '/media/mark/d1d75ed6-f3a5-433b-9090-d95191275f6c/download/camera/2022-06-11/001/dav/02/02.23.35-02.23.56[M][0@0][0].dav'
lenght  119
basedate '20220611'
basetime '022335'
fullpath '/media/mark/d1d75ed6-f3a5-433b-9090-d95191275f6c/download/camera/2022-06-11/001/dav/02/02.27.19-02.27.40[M][0@0][0].dav'
lenght  119
basedate '20220611'
basetime '022719'
fullpath '/media/mark/d1d75ed6-f3a5-433b-9090-d95191275f6c/download/camera/2022-06-11/001/dav/04/04.08.22-04.08.43[M][0@0][0].dav'
lenght  119
basedate '20220611'
basetime '040822'
fullpath '/media/mark/d1d75ed6-f3a5-433b-9090-d95191275f6c/download/camera/2022-06-11/001/dav/06/06.50.14-06.50.40[M][0@0][0].dav'
lenght  119
basedate '20220611'
basetime '065014'
fullpath '/media/mark/d1d75ed6-f3a5-433b-9090-d95191275f6c/download/camera/2022-06-11/001/dav/06/06.50.43-06.51.28[M][0@0][0].dav'
lenght  119
basedate '20220611'
basetime '065043'
fullpath '/media/mark/d1d75ed6-f3a5-433b-9090-d95191275f6c/download/camera/2022-06-11/001/dav/06/06.56.56-06.58.02[M][0@0][0].dav'
lenght  119
basedate '20220611'
basetime '065656'
fullpath '/media/mark/d1d75ed6-f3a5-433b-9090-d95191275f6c/download/camera/2022-06-11/001/dav/09/09.18.31-09.19.09[M][0@0][0].dav'
lenght  119
basedate '20220611'
basetime '091831'
fullpath '/media/mark/d1d75ed6-f3a5-433b-9090-d95191275f6c/download/camera/2022-06-11/001/dav/09/09.47.54-09.55.00[M][0@0][0].dav'
lenght  119
basedate '20220611'
basetime '094754'
fullpath '/media/mark/d1d75ed6-f3a5-433b-9090-d95191275f6c/download/camera/2022-06-11/001/dav/09/09.55.00-09.55.50[M][0@0][0].dav'
lenght  119
basedate '20220611'
basetime '095500'
fullpath '/media/mark/d1d75ed6-f3a5-433b-9090-d95191275f6c/download/camera/2022-06-11/001/dav/10/10.20.23-10.20.44[M][0@0][0].dav'
lenght  119
basedate '20220611'
basetime '102023'
fullpath '/media/mark/d1d75ed6-f3a5-433b-9090-d95191275f6c/download/camera/2022-06-11/001/dav/10/10.24.24-10.24.44[M][0@0][0].dav'
lenght  119
basedate '20220611'
basetime '102424'
fullpath '/media/mark/d1d75ed6-f3a5-433b-9090-d95191275f6c/download/camera/2022-06-11/001/dav/11/11.00.39-11.01.34[M][0@0][0].dav'
lenght  119
basedate '20220611'
basetime '110039'
fullpath '/media/mark/d1d75ed6-f3a5-433b-9090-d95191275f6c/download/camera/2022-06-11/001/dav/13/13.26.22-13.26.53[M][0@0][0].dav'
lenght  119
basedate '20220611'
basetime '132622'
fullpath '/media/mark/d1d75ed6-f3a5-433b-9090-d95191275f6c/download/camera/2022-06-11/001/dav/16/16.00.09-16.01.04[M][0@0][0].dav'
lenght  119
basedate '20220611'
basetime '160009'
fullpath '/media/mark/d1d75ed6-f3a5-433b-9090-d95191275f6c/download/camera/2022-06-11/001/dav/16/16.38.46-16.39.15[M][0@0][0].dav'
lenght  119
basedate '20220611'
basetime '163846'
fullpath '/media/mark/d1d75ed6-f3a5-433b-9090-d95191275f6c/download/camera/2022-06-11/001/dav/16/16.56.05-16.56.30[M][0@0][0].dav'
lenght  119
basedate '20220611'
basetime '165605'
fullpath '/media/mark/d1d75ed6-f3a5-433b-9090-d95191275f6c/download/camera/2022-06-11/001/dav/16/16.56.30-16.57.05[M][0@0][0].dav'
lenght  119
basedate '20220611'
basetime '165630'
fullpath '/media/mark/d1d75ed6-f3a5-433b-9090-d95191275f6c/download/camera/2022-06-11/001/dav/19/19.24.56-19.25.33[M][0@0][0].dav'
lenght  119
basedate '20220611'
basetime '192456'
fullpath '/media/mark/d1d75ed6-f3a5-433b-9090-d95191275f6c/download/camera/2022-06-11/001/dav/19/19.51.13-19.52.00[M][0@0][0].dav'
lenght  119
basedate '20220611'
basetime '195113'
fullpath '/media/mark/d1d75ed6-f3a5-433b-9090-d95191275f6c/download/camera/2022-06-11/001/dav/19/19.52.37-19.53.10[M][0@0][0].dav'
lenght  119
basedate '20220611'
basetime '195237'
fullpath '/media/mark/d1d75ed6-f3a5-433b-9090-d95191275f6c/download/camera/2022-06-11/001/dav/20/20.05.29-20.06.02[M][0@0][0].dav'
lenght  119
basedate '20220611'
basetime '200529'
fullpath '/media/mark/d1d75ed6-f3a5-433b-9090-d95191275f6c/download/camera/2022-06-11/001/dav/20/20.26.44-20.27.38[M][0@0][0].dav'
lenght  119
basedate '20220611'
basetime '202644'
fullpath '/media/mark/d1d75ed6-f3a5-433b-9090-d95191275f6c/download/camera/2022-06-11/001/dav/20/20.35.20-20.35.41[M][0@0][0].dav'
lenght  119
basedate '20220611'
basetime '203520'
fullpath '/media/mark/d1d75ed6-f3a5-433b-9090-d95191275f6c/download/camera/2022-06-11/001/dav/20/20.38.57-20.39.17[M][0@0][0].dav'
lenght  119
basedate '20220611'
basetime '203857'
fullpath '/media/mark/d1d75ed6-f3a5-433b-9090-d95191275f6c/download/camera/2022-06-11/001/dav/20/20.40.49-20.41.11[M][0@0][0].dav'
lenght  119
basedate '20220611'
basetime '204049'
fullpath '/media/mark/d1d75ed6-f3a5-433b-9090-d95191275f6c/download/camera/2022-06-11/001/dav/20/20.44.27-20.44.47[M][0@0][0].dav'
lenght  119
basedate '20220611'
basetime '204427'
fullpath '/media/mark/d1d75ed6-f3a5-433b-9090-d95191275f6c/download/camera/2022-06-11/001/dav/20/20.49.09-20.49.46[M][0@0][0].dav'
lenght  119
basedate '20220611'
basetime '204909'
fullpath '/media/mark/d1d75ed6-f3a5-433b-9090-d95191275f6c/download/camera/2022-06-11/001/dav/20/20.51.09-20.51.58[M][0@0][0].dav'
lenght  119
basedate '20220611'
basetime '205109'
fullpath '/media/mark/d1d75ed6-f3a5-433b-9090-d95191275f6c/download/camera/2022-06-11/001/dav/22/22.33.25-22.33.46[M][0@0][0].dav'
lenght  119
basedate '20220611'
basetime '223325'
fullpath '/media/mark/d1d75ed6-f3a5-433b-9090-d95191275f6c/download/camera/2022-06-11/001/dav/22/22.38.48-22.39.10[M][0@0][0].dav'
lenght  119
basedate '20220611'
basetime '223848'
fullpath '/media/mark/d1d75ed6-f3a5-433b-9090-d95191275f6c/download/camera/2022-06-11/001/dav/22/22.50.14-22.50.35[M][0@0][0].dav'
lenght  119
basedate '20220611'
basetime '225014'
fullpath '/media/mark/d1d75ed6-f3a5-433b-9090-d95191275f6c/download/camera/2022-06-11/001/dav/23/23.04.43-23.05.03[M][0@0][0].dav'
lenght  119
basedate '20220611'
basetime '230443'
fullpath '/media/mark/d1d75ed6-f3a5-433b-9090-d95191275f6c/download/camera/2022-06-11/001/dav/23/23.08.18-23.08.40[M][0@0][0].dav'
lenght  119
basedate '20220611'
basetime '230818'
fullpath '/media/mark/d1d75ed6-f3a5-433b-9090-d95191275f6c/download/camera/2022-06-11/001/dav/23/23.19.51-23.20.11[M][0@0][0].dav'
lenght  119
basedate '20220611'
basetime '231951'
fullpath '/media/mark/d1d75ed6-f3a5-433b-9090-d95191275f6c/download/camera/2022-06-11/001/dav/23/23.23.27-23.23.48[M][0@0][0].dav'
lenght  119
basedate '20220611'
basetime '232327'


  


  `
If I remove the comment and do the ffmpeg thing it fails for some files because $fullpath is wrong :

  


  $cat flist.txt
fullpath '/media/mark/d1d75ed6-f3a5-433b-9090-d95191275f6c/download/camera/2022-06-11/001/dav/00/00.01.33-00.01.55[M][0@0][0].dav'
lenght  119
basedate '20220611'
basetime '000133'
fullpath 'media/mark/d1d75ed6-f3a5-433b-9090-d95191275f6c/download/camera/2022-06-11/001/dav/00/00.29.26-00.29.48[M][0@0][0].dav'
lenght  118
basedate '20220611'
basetime '002926'
fullpath '/media/mark/d1d75ed6-f3a5-433b-9090-d95191275f6c/download/camera/2022-06-11/001/dav/00/00.33.09-00.33.32[M][0@0][0].dav'
lenght  119
basedate '20220611'
basetime '003309'
fullpath 'media/mark/d1d75ed6-f3a5-433b-9090-d95191275f6c/download/camera/2022-06-11/001/dav/02/02.23.35-02.23.56[M][0@0][0].dav'
lenght  118
basedate '20220611'
basetime '022335'
fullpath '/media/mark/d1d75ed6-f3a5-433b-9090-d95191275f6c/download/camera/2022-06-11/001/dav/02/02.27.19-02.27.40[M][0@0][0].dav'
lenght  119
basedate '20220611'
basetime '022719'
fullpath 'media/mark/d1d75ed6-f3a5-433b-9090-d95191275f6c/download/camera/2022-06-11/001/dav/04/04.08.22-04.08.43[M][0@0][0].dav'
lenght  118
basedate '20220611'
basetime '040822'
fullpath '/media/mark/d1d75ed6-f3a5-433b-9090-d95191275f6c/download/camera/2022-06-11/001/dav/06/06.50.14-06.50.40[M][0@0][0].dav'
lenght  119
basedate '20220611'
basetime '065014'
fullpath 'media/mark/d1d75ed6-f3a5-433b-9090-d95191275f6c/download/camera/2022-06-11/001/dav/06/06.50.43-06.51.28[M][0@0][0].dav'
lenght  118
basedate '20220611'
basetime '065043'
fullpath '/media/mark/d1d75ed6-f3a5-433b-9090-d95191275f6c/download/camera/2022-06-11/001/dav/06/06.56.56-06.58.02[M][0@0][0].dav'
lenght  119
basedate '20220611'
basetime '065656'
fullpath 'edia/mark/d1d75ed6-f3a5-433b-9090-d95191275f6c/download/camera/2022-06-11/001/dav/09/09.18.31-09.19.09[M][0@0][0].dav'
lenght  117
basedate '20220611'
basetime '091831'
fullpath '/media/mark/d1d75ed6-f3a5-433b-9090-d95191275f6c/download/camera/2022-06-11/001/dav/09/09.47.54-09.55.00[M][0@0][0].dav'
lenght  119
basedate '20220611'
basetime '094754'
fullpath '1/dav/09/09.55.00-09.55.50[M][0@0][0].dav'
lenght  41
basedate '][0@][].'
basetime '095500'
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  So why does it fail when ffmpeg is not commented out ?

  


  Follow-up : found this post

  


  https://unix.stackexchange.com/questions/241535/problem-with-ffmpeg-in-bash-loop

  


  I think this relates to my problem but I don't know how to change my code accordingly.

  


  Edit2, I think I found the solution

  


  ffmpeg -y -i $fullpath -c:v copy -movflags +faststart $newfilename < /dev/null &> /dev/null;