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• Why won't Apple players play this ffmpeg-generated video ? [duplicate]

  3 octobre 2018, par Giuseppe

  This question already has an answer here :

  • ffmpeg PNG to mp4 - Black screen
    
    1 answer
    

  I generated a short mp4 from a stack of PNG images, with no audio, like so :

  ffmpeg -r 24 -i t-%03d.png -r 24 -c:v libx264 test.mp4

  On my MacBook, the resulting video plays just fine with VLC or Chrome. With iTunes or Final Cut Pro, on the other hand, the progress bar moves as if playing was in progress, but the screen is blank. Finally, Safari and QuickTime complain that the format is invalid.

  Here is ffprobe’s output :

  ffprobe version 4.0.2 Copyright (c) 2007-2018 the FFmpeg developers
  
    built with Apple LLVM version 9.1.0 (clang-902.0.39.2)
  
    configuration: --prefix=/usr/local/Cellar/ffmpeg/4.0.2 --enable-shared --enable-pthreads --enable-version3 --enable-hardcoded-tables --enable-avresample --cc=clang --host-cflags= --host-ldflags= --enable-gpl --enable-libmp3lame --enable-libvorbis --enable-libvpx --enable-libx264 --enable-libx265 --enable-libxvid --enable-opencl --enable-videotoolbox --disable-lzma
  
    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, mov,mp4,m4a,3gp,3g2,mj2, from 'test.mp4':
  
    Metadata:
  
      major_brand     : isom
  
      minor_version   : 512
  
      compatible_brands: isomiso2avc1mp41
  
      encoder         : Lavf58.12.100
  
    Duration: 00:00:20.17, start: 0.000000, bitrate: 3918 kb/s
  
      Stream #0:0(und): Video: h264 (High 4:4:4 Predictive) (avc1 / 0x31637661), yuvj444p(pc), 1600x1200 [SAR 1:1 DAR 4:3], 3916 kb/s, 24 fps, 24 tbr, 12288 tbn, 48 tbc (default)
  
      Metadata:
  
        handler_name    : VideoHandler

• ffmpeg pipe output and script [duplicate]

  27 juillet 2018, par James Magnus

  This question already has an answer here :

  • Execute command in a variable don’t execute the latter part of a pipe
    
    1 answer
    

  I need to extract raw video and pipe it to another program. This runs perfectly in a terminal :

  ffmpeg -i SampleVideo_1280x720_5mb.mp4 -s 1920x1080 -c:v rawvideo -pix_fmt yuv420p -f rawvideo - | ffplay -f rawvideo -pix_fmt yuv420p -s 1920x1080 -

  But when I try to run this command from a script it fails. Here is a very simplified version of the script :

  #!/bin/bash
  
  
  
  c='ffmpeg -i SampleVideo_1280x720_5mb.mp4 -s 1920x1080 -c:v rawvideo -pix_fmt yuv420p -f rawvideo - | ffplay -f rawvideo -pix_fmt yuv420p -s 1920x1080 -'
  
  $c

  The output

  ~/ets/videos$ ./test.sh 
  
  ffmpeg version N-91403-gd24c9e5 Copyright (c) 2000-2018 the FFmpeg developers
  
    built with gcc 5.4.0 (Ubuntu 5.4.0-6ubuntu1~16.04.10) 20160609
  
    configuration: --extra-cflags='-fPIC -I/home/jlbeaussart/ffmpeg_build/include' --extra-ldflags=-L/home/jlbeaussart/ffmpeg_build/lib --extra-libs='-lpthread -lm' --enable-gpl --enable-libaom --enable-libass --enable-libfdk-aac --enable-libfreetype --enable-libmp3lame --enable-libopus --enable-libvorbis --enable-libvpx --enable-libx264 --enable-libx265 --enable-shared --enable-libcaca --enable-libxvid --enable-libxml2 --enable-opencl --enable-opengl --enable-cuvid --enable-ffnvcodec --enable-libdrm --enable-nvenc --enable-nvdec --enable-vaapi --enable-vdpau --enable-nonfree
  
    libavutil      56. 18.102 / 56. 18.102
  
    libavcodec     58. 20.104 / 58. 20.104
  
    libavformat    58. 17.101 / 58. 17.101
  
    libavdevice    58.  4.101 / 58.  4.101
  
    libavfilter     7. 25.100 /  7. 25.100
  
    libswscale      5.  2.100 /  5.  2.100
  
    libswresample   3.  2.100 /  3.  2.100
  
    libpostproc    55.  2.100 / 55.  2.100
  
  Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'SampleVideo_1280x720_5mb.mp4':
  
    Metadata:
  
      major_brand     : isom
  
      minor_version   : 512
  
      compatible_brands: isomiso2avc1mp41
  
      creation_time   : 1970-01-01T00:00:00.000000Z
  
      encoder         : Lavf53.24.2
  
    Duration: 00:00:29.57, start: 0.000000, bitrate: 1421 kb/s
  
      Stream #0:0(und): Video: h264 (Main) (avc1 / 0x31637661), yuv420p, 1280x720 [SAR 1:1 DAR 16:9], 1032 kb/s, 25 fps, 25 tbr, 12800 tbn, 50 tbc (default)
  
      Metadata:
  
        creation_time   : 1970-01-01T00:00:00.000000Z
  
        handler_name    : VideoHandler
  
      Stream #0:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, 5.1, fltp, 383 kb/s (default)
  
      Metadata:
  
        creation_time   : 1970-01-01T00:00:00.000000Z
  
        handler_name    : SoundHandler
  
  [NULL @ 0x18d5d40] Unable to find a suitable output format for '|'
  
  |: Invalid argument

• ffmpeg concat and preserve metadata streams

  16 décembre 2024, par Andrew

  I'm trying to concat multiple files that are the result of a GoPro Hero6 splitting movies to avoid the FAT 4GB limit. ffmpeg works great for this purpose but I need the telemetry data that is encoded in the metadata streams, and ffmpeg by default doesn't seem to preserve this. Using the ffprobe command you can see that the source videos have :

  



  Stream #0:3(eng): Data: none (gpmd / 0x646D7067), 36 kb/s (default)
Metadata:
  creation_time   : 2018-07-15T16:16:26.000000Z
  handler_name    : GoPro MET


  



  I know from research that this is the stream I need (although I'd like to be able to copy all streams). However when using ffmpeg -f concat the output is :

  



  [concat @ 0x7febb9800000] Could not find codec parameters for stream 2 (Unknown: none): unknown codec
Consider increasing the value for the 'analyzeduration' and 'probesize' options
[concat @ 0x7febb9800000] Could not find codec parameters for stream 3 (Unknown: none): unknown codec
Consider increasing the value for the 'analyzeduration' and 'probesize' options
[concat @ 0x7febb9800000] Could not find codec parameters for stream 4 (Unknown: none): unknown codec
Consider increasing the value for the 'analyzeduration' and 'probesize' options
Input #0, concat, from 'tmp.txt':
  Duration: N/A, start: 0.000000, bitrate: 66194 kb/s
    Stream #0:0(eng): Video: h264 (High) (avc1 / 0x31637661), yuvj420p(pc, bt709), 2704x1520 [SAR 1:1 DAR 169:95], 66005 kb/s, 59.94 fps, 59.94 tbr, 60k tbn, 119.88 tbc
    Metadata:
      creation_time   : 2018-07-15T16:08:22.000000Z
      handler_name    : GoPro AVC
      encoder         : GoPro AVC encoder
      timecode        : 16:23:48:21
    Stream #0:1(eng): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 189 kb/s
    Metadata:
      creation_time   : 2018-07-15T16:08:22.000000Z
      handler_name    : GoPro AAC
      timecode        : 16:23:48:21
    Stream #0:2: Unknown: none
    Stream #0:3: Unknown: none
    Stream #0:4: Unknown: none
Output #0, mp4, to 'GH0089.MP4':
  Metadata:
    encoder         : Lavf58.12.100
    Stream #0:0(eng): Video: h264 (High) (avc1 / 0x31637661), yuvj420p(pc, bt709), 2704x1520 [SAR 1:1 DAR 169:95], q=2-31, 66005 kb/s, 0.02 fps, 59.94 tbr, 60k tbn, 60k tbc
    Metadata:
      creation_time   : 2018-07-15T16:08:22.000000Z
      handler_name    : GoPro AVC
      encoder         : GoPro AVC encoder
      timecode        : 16:23:48:21
    Stream #0:1(eng): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 189 kb/s
    Metadata:
      creation_time   : 2018-07-15T16:08:22.000000Z
      handler_name    : GoPro AAC
      timecode        : 16:23:48:21
Stream mapping:
  Stream #0:0 -> #0:0 (copy)
  Stream #0:1 -> #0:1 (copy)
Press [q] to stop, [?] for help


  



  The warnings Could not find codec parameters are especially interesting and Stream mapping shows that only the video and audio streams are mapped. I've played around with map_metadata to no avail. I may not have the format right but it seems more likely that the issue is related to the warning as the codecs are not recognized and I would expect all streams to be mapped by default.

  



  I would expect or hope for an answer that ignore the warnings and map the unrecognized streams without attempting to understand them.

  



  Any help is appreciated.