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• aacdec : Don’t fall back to the old output configuration when no old configuration...

  7 août 2012, par Alex Converse

  aacdec : Don’t fall back to the old output configuration when no old configuration...

• ffmpeg-python extract a specific video stream, change its FPS and embed it back in the video

  19 mars 2021, par user972014

  I have a video containing several streams. A few data and one video.

  


  I need to extract the video stream, change the frame rate, embed it back in the video (or combine all stream back to an output file)

  


  If needed, this is the list of existing streams :

  


  I only need stream 0 and 5 (both video streams) Converted to 2 FPS. And stream 3 which is gpmd, which some irrelevant data format that I need to keep.

  


  Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'C:\temp\video.360':
  Metadata:
    major_brand     : mp41
    minor_version   : 538120216
    compatible_brands: mp41
    creation_time   : 2020-09-08 16:35:49
  Duration: 00:00:28.13, start: 0.000000, bitrate: 66559 kb/s
    Stream #0:0(eng): Video: hevc (Main) (hvc1 / 0x31637668), yuvj420p(pc, bt709), 4096x1344 [SAR 1:1 DAR 64:21], 30036 kb/s, 29.97 fps, 29.97 tbr, 90k tbn, 29.97 tbc (default)
    Metadata:
      creation_time   : 2020-09-08 16:35:49
      handler_name    : GoPro H.265
      encoder         : GoPro H.265 encoder
    Stream #0:1(eng): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 189 kb/s (default)
    Metadata:
      creation_time   : 2020-09-08 16:35:49
      handler_name    : GoPro AAC
    Stream #0:2(eng): Data: none (tmcd / 0x64636D74), 0 kb/s (default)
    Metadata:
      creation_time   : 2020-09-08 16:35:49
      handler_name    : GoPro TCD
    Stream #0:3(eng): Data: none (gpmd / 0x646D7067), 96 kb/s (default)
    Metadata:
      creation_time   : 2020-09-08 16:35:49
      handler_name    : GoPro MET
    Stream #0:4(eng): Data: none (fdsc / 0x63736466), 20 kb/s (default)
    Metadata:
      creation_time   : 2020-09-08 16:35:49
      handler_name    : GoPro SOS
    Stream #0:5(eng): Video: hevc (Main) (hvc1 / 0x31637668), yuvj420p(pc, bt709), 4096x1344 [SAR 1:1 DAR 64:21], 30019 kb/s, 29.97 fps, 29.97 tbr, 90k tbn, 29.97 tbc (default)
    Metadata:
      creation_time   : 2020-09-08 16:35:49
      handler_name    : GoPro H.265
      encoder         : GoPro H.265 encoder
    Side data:
      displaymatrix: rotation of nan degrees
    Stream #0:6(eng): Audio: pcm_s32be (in32 / 0x32336E69), 48000 Hz, 4 channels, s32, 6144 kb/s (default)
    Metadata:
      creation_time   : 2020-09-08 16:35:49
      handler_name    : GoPro AMB


  


• Looping back and forth through frames with ffmpeg

  18 mai 2017, par sebb

  I have a set of ten PNG frames that I’d like to convert to a "boomerang style" mp4 file (i.e go from frame 1 to frame 10, then from 9 to 2). I’d like to find something similar to ImageMagick’s patrol cycle, but can’t figure out how to to it with ffmpeg.

  I thought it would be possible to do this using concat but :

  • I think it’s dirty
  • My command simply does not work :)

  Here’s my command so far :

  -framerate 5 -i "concat:01.png|02.png|03.png|04.png|05.png|06.png|07.png|08.png|09.png|10.png|09.png|08.png|07.png|06.png|05.png|04.png|03.png|02.png" -pix_fmt yuv420p output.mp4

  I get a video file but it just goes from 1 to 10 once.

  Here’s ffmpeg’s saying hello :

  ffmpeg version N-86098-g3fefaea Copyright (c) 2000-2017 the FFmpeg developers
  
  
  
    built with gcc 6.3.0 (GCC)
  
  
  
    configuration: --enable-gpl --enable-version3 --enable-cuda --enable-cuvid --enable-d3d11va --enable-dxva2 --enable-libmfx --enable-nvenc --enable-avisynth --enable-bzlib --enable-fontconfig --enable-frei0r --enable-gnutls --enable-iconv --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libfreetype --enable-libgme --enable-libgsm --enable-libilbc --enable-libmodplug --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenh264 --enable-libopenjpeg --enable-libopus --enable-librtmp --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libtheora --enable-libtwolame --enable-libvidstab --enable-libvo-amrwbenc --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxavs --enable-libxvid --enable-libzimg --enable-lzma --enable-zlib
  
  
  
    libavutil      55. 63.100 / 55. 63.100
  
  
  
    libavcodec     57. 96.101 / 57. 96.101
  
  
  
    libavformat    57. 72.101 / 57. 72.101
  
  
  
    libavdevice    57.  7.100 / 57.  7.100
  
  
  
    libavfilter     6. 89.101 /  6. 89.101
  
  
  
    libswscale      4.  7.101 /  4.  7.101
  
  
  
    libswresample   2.  8.100 /  2.  8.100
  
  
  
    libpostproc    54.  6.100 / 54.  6.100

  Anyone has an idea ?

  Thanks !