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• Error initializing filter 'pan' with args 'stereo:c0 c0+c2:c1 c1+c3'

  24 mai 2020, par Android Developer

  I run below FFmpeg command to merge audio and video keeping video's original audio using FFmpeg 4.0-39 version-

  



  -i /storage/emulated/0/Movies/extract_audio.mp3 -i /storage/emulated/0/Movies/VID-20200501-WA0000.mp4 -filter_complex [0:a][1:a]amerge,pan=stereo:c0storage/emulated/0/Movies/merge_video.mp4


  



  It fails for all videos with below error !However same command runs fine when using older version 3.0.1 of FFMpeg !

  



  FAILED with output : ffmpeg version n4.0-39-gda39990 Copyright (c) 2000-2018 the FFmpeg developers
      built with gcc 4.9.x (GCC) 20150123 (prerelease)
      configuration: --target-os=linux --cross-prefix=/root/bravobit/ffmpeg-android/toolchain-android/bin/arm-linux-androideabi- --arch=arm --cpu=cortex-a8 --enable-runtime-cpudetect --sysroot=/root/bravobit/ffmpeg-android/toolchain-android/sysroot --enable-pic --enable-libx264 --enable-ffprobe --enable-libopus --enable-libvorbis --enable-libfdk-aac --enable-libfreetype --enable-libfribidi --enable-libmp3lame --enable-fontconfig --enable-libvpx --enable-libass --enable-yasm --enable-pthreads --disable-debug --enable-version3 --enable-hardcoded-tables --disable-ffplay --disable-linux-perf --disable-doc --disable-shared --enable-static --enable-runtime-cpudetect --enable-nonfree --enable-network --enable-avresample --enable-avformat --enable-avcodec --enable-indev=lavfi --enable-hwaccels --enable-ffmpeg --enable-zlib --enable-gpl --enable-small --enable-nonfree --pkg-config=pkg-config --pkg-config-flags=--static --prefix=/root/bravobit/ffmpeg-android/build/armeabi-v7a --extra-cflags='-I/root/bravobit/ffmpeg-android/toolchain-android/include -U_FORTIFY_SOURCE -D_FORTIFY_SOURCE=2 -fno-strict-overflow -fstack-protector-all' --extra-ldflags='-L/root/bravobit/ffmpeg-android/toolchain-android/lib -Wl,-z,relro -Wl,-z,now -pie' --extra-cxxflags=
      libavutil      56. 14.100 / 56. 14.100
      libavcodec     58. 18.100 / 58. 18.100
      libavformat    58. 12.100 / 58. 12.100
      libavdevice    58.  3.100 / 58.  3.100
      libavfilter     7. 16.100 /  7. 16.100
      libavresample   4.  0.  0 /  4.  0.  0
      libswscale      5.  1.100 /  5.  1.100
      libswresample   3.  1.100 /  3.  1.100
      libpostproc    55.  1.100 / 55.  1.100
    Input #0, mp3, from '/storage/emulated/0/Movies/extract_audio.mp3.mp4':
      Metadata:
        major_brand     : M4V 
        minor_version   : 512
        compatible_brands: isomiso2avc1
        encoder         : Lavf58.12.100
      Duration: 00:00:20.04, start: 0.025057, bitrate: 256 kb/s
        Stream #0:0: Audio: mp3, 44100 Hz, stereo, fltp, 256 kb/s
        Metadata:
          encoder         : Lavc58.18
    Input #1, mov,mp4,m4a,3gp,3g2,mj2, from '/storage/emulated/0/Movies/VID-20200501-WA0000.mp4.mp4':
      Metadata:
        major_brand     : isom
        minor_version   : 512
        compatible_brands: isomiso2avc1mp41
        encoder         : Lavf58.20.100
      Duration: 00:00:09.83, start: 0.000000, bitrate: 809 kb/s
        Stream #1:0(und): Video: h264 (avc1 / 0x31637661), yuv420p(tv, bt709), 480x600, 737 kb/s, 30 fps, 30 tbr, 15360 tbn, 60 tbc (default)
        Metadata:
          handler_name    : VideoHandler
        Stream #1:1(und): Audio: aac (mp4a / 0x6134706D), 44100 Hz, stereo, fltp, 64 kb/s (default)
        Metadata:
          handler_name    : SoundHandler
    [Parsed_pan_1 @ 0xaef0c000] This syntax is deprecated. Use '|' to separate the list items ('stereo|c0code>

  


• How do I avoid batch video transcoding error when encountering whitespaces in filename using ffmpeg [duplicate]

  20 février 2019, par russell newton

  This question already has an answer here :

  • Looping through find output in Bash where file name contains white spaces
    
    2 answers
    

  I am running a bash script to batch transcode videos on a LAMP server using find and ffmpeg

  dir="/srv/videos"
  
  for OUTPUT in "$(find $dir -iname *.AVI -o -iname *.MOV)"
  
  do
  
      ffmpeg -i "$OUTPUT" "${OUTPUT%%.*}.mp4"  -hide_banner
  
  done

  ffmpeg returns an error if file has whitespaces

   /srv/videos/file with white spaces.MOV: No such file or directory

  For files without white spaces it works fine.
  If I print the filenames inside quotes it looks as though it should be working

  for OUTPUT in "$(find $dir -iname *.MOV)"; do echo "$OUTPUT";done

  returns

  /srv/videos/file with white spaces.MOV

  What do I need to alter to avoid the error please ?

  EDIT
  added "" to $OUTPUT%%.*.mp4, I get the same error and corrected extension capitalisation (mov to MOV)

• FFMPEG, how to create custom waveform

  9 juin 2017, par Bodie Leonard

  I have done research trying to create a waveform with FFMPEG and am currently able to create a white png with the wave being transparent. The goal is to generate the wave like the smooth wave below and have the grey be transparent.
  

  Here is my current FFMPEG waveform generator and output.

  ffmpeg -i ./_test.mp3 -filter_complex \
  
  "[0:a]aformat=channel_layouts=mono,compand=gain=-6, \
  
  showwavespic=s=450x46:colors=white,negate[a]; \
  
  color=white:450x46[c]; \
  
  [c][a]alphamerge"  -vframes 1 _test.png