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• FFMPEG avcodec_find_decoder(2) (CODEC_ID_MPEG2VIDEO) always returns incomplete AVCodec ?

  22 octobre 2012, par Passer

  I got a problem with FFMPEG (avcodec-54.dll)
  1) I wrote a .NET wrapper. As far as I can see it works well.
  2) I try to decode something... and thats were the problem is :

  ...
  
    FFmpeg.avcodec_register_all();
  
  
  
    pAVCodec = FFmpeg.avcodec_find_decoder(CodecID.CODEC_ID_MPEG2VIDEO); //which is in int 2
  
    Console.WriteLine("CodecID " + (*pAVCodec).id);
  
    Console.WriteLine("CodecType " + (*pAVCodec).type);
  
    Console.WriteLine("CodecName " + (*pAVCodec).name);
  
  ....

  ---

  No EXC was thrown and the following output came :
  

  CodecID CODEC_ID_NONE
  
  CodecType 1790854254
  
  CodecName mpeg2video

  ---

  What confuses me the most is that the name is correct, but the id and type are wrong.
  In the previous Version if the DLL everything works fine. This behaviour came up with the new version.
  Any guesses or debugging tips ?

• Calculate VMAF for HEVC or H264 with ffmpeg

  3 juin 2020, par ringola27

  I am able to calculate VMAF for the videos encoded with VP9 but not for the videos encoded with HEVC and H264.

  



  I am getting the output :

  



  VMAF score: nan

  



  For the Command Line : 
ffmpeg -i netflix200kHEVC.mp4 -i netflixboxing.y4m -lavfi "libvmaf=model_path=/usr/local/share/model/vmaf_v0.6.1.pkl" -f null -

  



  Do you know this kind of problem ? How can I solve it ?

  



      ffmpeg -i netflix200kHEVC.mp4 -i netflixboxing.y4m -lavfi "libvmaf=model_path=/usr/local/share/model/vmaf_v0.6.1.pkl" -f null -
ffmpeg version 4.2.2 Copyright (c) 2000-2019 the FFmpeg developers
  built with Apple clang version 11.0.3 (clang-1103.0.32.62)
  configuration: --prefix=/usr/local/Cellar/ffmpeg/4.2.2-with-options_2 --enable-shared --cc=clang --host-cflags=-fno-stack-check --host-ldflags= --enable-gpl --enable-libaom --enable-libdav1d --enable-libmp3lame --enable-libopus --enable-libsnappy --enable-libtheora --enable-libvorbis --enable-libvpx --enable-libx264 --enable-libx265 --enable-libfontconfig --enable-libfreetype --enable-frei0r --enable-libass --disable-libjack --disable-indev=jack --enable-opencl --enable-videotoolbox --disable-htmlpages --enable-libvmaf --enable-version3
  libavutil      56. 31.100 / 56. 31.100
  libavcodec     58. 54.100 / 58. 54.100
  libavformat    58. 29.100 / 58. 29.100
  libavdevice    58.  8.100 / 58.  8.100
  libavfilter     7. 57.100 /  7. 57.100
  libswscale      5.  5.100 /  5.  5.100
  libswresample   3.  5.100 /  3.  5.100
  libpostproc    55.  5.100 / 55.  5.100
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'netflix200kHEVC.mp4':
  Metadata:
    major_brand     : isom
    minor_version   : 512
    compatible_brands: isomiso2mp41
    encoder         : Lavf58.29.100
  Duration: 00:00:04.23, start: 0.000000, bitrate: 2070 kb/s
    Stream #0:0(und): Video: hevc (Main 10) (hev1 / 0x31766568), yuv420p10le(tv, progressive), 4096x2160 [SAR 1:1 DAR 256:135], 2058 kb/s, 60 fps, 60 tbr, 15360 tbn, 60 tbc (default)
    Metadata:
      handler_name    : VideoHandler
Input #1, yuv4mpegpipe, from 'netflixboxing.y4m':
  Duration: 00:00:04.23, start: 0.000000, bitrate: 12740202 kb/s
    Stream #1:0: Video: rawvideo (Y3[11][10] / 0xA0B3359), yuv420p10le(progressive), 4096x2160, SAR 1:1 DAR 256:135, 60 fps, 60 tbr, 60 tbn, 60 tbc
Stream mapping:
  Stream #0:0 (hevc) -> libvmaf:main
  Stream #1:0 (rawvideo) -> libvmaf:reference
  libvmaf -> Stream #0:0 (wrapped_avframe)
Press [q] to stop, [?] for help
frame=    0 fps=0.0 q=0.0 size=N/A time=-577014:32:22.77 bitrate=N/A speed=N/A  Output #0, null, to 'pipe:':
  Metadata:
    major_brand     : isom
    minor_version   : 512
    compatible_brands: isomiso2mp41
    encoder         : Lavf58.29.100
    Stream #0:0: Video: wrapped_avframe, yuv420p10le, 4096x2160 [SAR 1:1 DAR 256:135], q=2-31, 200 kb/s, 60 fps, 60 tbn, 60 tbc (default)
    Metadata:
      encoder         : Lavc58.54.100 wrapped_avframe
frame=    2 fps=1.4 q=-0.0 size=N/A time=00:00:00.03 bitrate=N/A speed=0.0229x  frame=    4 fps=2.0 q=-0.0 size=N/A time=00:00:00.06 bitrate=N/A speed=0.0325x  frame=    5 fps=1.7 q=-0.0 size=N/A time=00:00:00.08 bitrate=N/A speed=0.0281x  frame=    6 fps=1.7 q=-0.0 size=N/A time=00:00:00.10 bitrate=N/A speed=0.0279x  frame=    7 fps=1.0 q=-0.0 size=N/A time=00:00:00.11 bitrate=N/A speed=0.0162x  frame=    8 fps=1.0 q=-0.0 size=N/A time=00:00:00.13 bitrate=N/A speed=0.0163x  frame=   10 fps=1.1 q=-0.0 size=N/A time=00:00:00.16 bitrate=N/A speed=0.0191x  frame=   11 fps=0.9 q=-0.0 size=N/A time=00:00:00.18 bitrate=N/A speed=0.0156x  frame=   12 fps=1.0 q=-0.0 size=N/A time=00:00:00.20 bitrate=N/A speed=0.0161x  frame=   14 fps=1.1 q=-0.0 size=N/A time=00:00:00.23 bitrate=N/A speed=0.0179x  frame=   15 fps=1.0 q=-0.0 size=N/A time=00:00:00.25 bitrate=N/A speed=0.0169x  frame=   16 fps=1.0 q=-0.0 size=N/A time=00:00:00.26 bitrate=N/A speed=0.0174x  frame=   18 fps=1.1 q=-0.0 size=N/A 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speed=0.0202x  frame=   35 fps=1.2 q=-0.0 size=N/A time=00:00:00.58 bitrate=N/A speed=0.0201x  frame=   37 fps=1.2 q=-0.0 size=N/A time=00:00:00.61 bitrate=N/A speed=0.0202x  frame=   39 fps=1.2 q=-0.0 size=N/A time=00:00:00.65 bitrate=N/A speed=0.0203x  frame=   40 fps=1.2 q=-0.0 size=N/A time=00:00:00.66 bitrate=N/A speed=0.0203x  frame=   41 fps=1.2 q=-0.0 size=N/A time=00:00:00.68 bitrate=N/A speed=0.0205x  frame=   43 fps=1.2 q=-0.0 size=N/A time=00:00:00.71 bitrate=N/A speed=0.0206x  frame=   44 fps=1.2 q=-0.0 size=N/A time=00:00:00.73 bitrate=N/A speed=0.0205x  frame=   46 fps=1.3 q=-0.0 size=N/A time=00:00:00.76 bitrate=N/A speed=0.0211x  frame=   47 fps=1.3 q=-0.0 size=N/A time=00:00:00.78 bitrate=N/A speed=0.0209x  frame=   48 fps=1.2 q=-0.0 size=N/A time=00:00:00.80 bitrate=N/A speed=0.0208x  frame=   50 fps=1.3 q=-0.0 size=N/A time=00:00:00.83 bitrate=N/A speed=0.0212x  frame=   51 fps=1.3 q=-0.0 size=N/A time=00:00:00.85 bitrate=N/A speed=0.021x   frame=   52 fps=1.3 q=-0.0 size=N/A time=00:00:00.86 bitrate=N/A speed=0.0209x  frame=   54 fps=1.3 q=-0.0 size=N/A time=00:00:00.90 bitrate=N/A speed=0.0213x  frame=   55 fps=1.3 q=-0.0 size=N/A time=00:00:00.91 bitrate=N/A speed=0.0212x  frame=   56 fps=1.3 q=-0.0 size=N/A time=00:00:00.93 bitrate=N/A speed=0.021x   frame=   57 fps=1.3 q=-0.0 size=N/A time=00:00:00.95 bitrate=N/A speed=0.0211x  frame=   59 fps=1.3 q=-0.0 size=N/A time=00:00:00.98 bitrate=N/A speed=0.0212x  frame=   60 fps=1.3 q=-0.0 size=N/A time=00:00:01.00 bitrate=N/A speed=0.0211x  frame=   61 fps=1.3 q=-0.0 size=N/A time=00:00:01.01 bitrate=N/A speed=0.0212x  frame=   63 fps=1.3 q=-0.0 size=N/A time=00:00:01.05 bitrate=N/A speed=0.0212x  frame=   64 fps=1.3 q=-0.0 size=N/A time=00:00:01.06 bitrate=N/A speed=0.0211x  frame=   65 fps=1.3 q=-0.0 size=N/A time=00:00:01.08 bitrate=N/A speed=0.0212x  frame=   67 fps=1.3 q=-0.0 size=N/A time=00:00:01.11 bitrate=N/A speed=0.0213x  frame=   68 fps=1.3 q=-0.0 size=N/A time=00:00:01.13 bitrate=N/A speed=0.0212x  frame=   69 fps=1.3 q=-0.0 size=N/A time=00:00:01.15 bitrate=N/A speed=0.0212x  frame=   71 fps=1.3 q=-0.0 size=N/A time=00:00:01.18 bitrate=N/A speed=0.0213x  frame=   72 fps=1.3 q=-0.0 size=N/A time=00:00:01.20 bitrate=N/A speed=0.0212x  frame=   73 fps=1.3 q=-0.0 size=N/A time=00:00:01.21 bitrate=N/A speed=0.0213x  frame=   75 fps=1.3 q=-0.0 size=N/A time=00:00:01.25 bitrate=N/A speed=0.0214x  frame=   76 fps=1.3 q=-0.0 size=N/A time=00:00:01.26 bitrate=N/A speed=0.0213x  frame=   77 fps=1.3 q=-0.0 size=N/A time=00:00:01.28 bitrate=N/A speed=0.0213x  frame=   79 fps=1.3 q=-0.0 size=N/A time=00:00:01.31 bitrate=N/A speed=0.0215x  frame=   80 fps=1.3 q=-0.0 size=N/A time=00:00:01.33 bitrate=N/A speed=0.0214x  frame=   81 fps=1.3 q=-0.0 size=N/A time=00:00:01.35 bitrate=N/A speed=0.0214x  frame=   83 fps=1.3 q=-0.0 size=N/A time=00:00:01.38 bitrate=N/A speed=0.0216x  frame=   84 fps=1.3 q=-0.0 size=N/A time=00:00:01.40 bitrate=N/A speed=0.0214x  frame=   85 fps=1.3 q=-0.0 size=N/A time=00:00:01.41 bitrate=N/A speed=0.0214x  frame=   87 fps=1.3 q=-0.0 size=N/A time=00:00:01.45 bitrate=N/A speed=0.0215x  frame=   88 fps=1.3 q=-0.0 size=N/A time=00:00:01.46 bitrate=N/A speed=0.0214x  frame=   89 fps=1.3 q=-0.0 size=N/A time=00:00:01.48 bitrate=N/A speed=0.0215x  frame=   91 fps=1.3 q=-0.0 size=N/A time=00:00:01.51 bitrate=N/A speed=0.0216x  frame=   92 fps=1.3 q=-0.0 size=N/A time=00:00:01.53 bitrate=N/A speed=0.0214x  frame=   94 fps=1.3 q=-0.0 size=N/A time=00:00:01.56 bitrate=N/A speed=0.0217x  frame=   95 fps=1.3 q=-0.0 size=N/A time=00:00:01.58 bitrate=N/A speed=0.0216x  frame=   96 fps=1.3 q=-0.0 size=N/A time=00:00:01.60 bitrate=N/A speed=0.0213x  frame=   98 fps=1.3 q=-0.0 size=N/A time=00:00:01.63 bitrate=N/A speed=0.0216x  frame=   99 fps=1.3 q=-0.0 size=N/A time=00:00:01.65 bitrate=N/A speed=0.0216x  frame=  100 fps=1.3 q=-0.0 size=N/A time=00:00:01.66 bitrate=N/A speed=0.0214x  frame=  101 fps=1.3 q=-0.0 size=N/A time=00:00:01.68 bitrate=N/A speed=0.0214x  frame=  103 fps=1.3 q=-0.0 size=N/A time=00:00:01.71 bitrate=N/A speed=0.0216x  frame=  104 fps=1.3 q=-0.0 size=N/A time=00:00:01.73 bitrate=N/A speed=0.0214x  frame=  105 fps=1.3 q=-0.0 size=N/A time=00:00:01.75 bitrate=N/A speed=0.0214x  frame=  107 fps=1.3 q=-0.0 size=N/A time=00:00:01.78 bitrate=N/A speed=0.0216x  frame=  108 fps=1.3 q=-0.0 size=N/A time=00:00:01.80 bitrate=N/A speed=0.0214x  frame=  110 fps=1.3 q=-0.0 size=N/A time=00:00:01.83 bitrate=N/A speed=0.0216x  frame=  111 fps=1.3 q=-0.0 size=N/A time=00:00:01.85 bitrate=N/A speed=0.0216x  frame=  112 fps=1.3 q=-0.0 size=N/A time=00:00:01.86 bitrate=N/A speed=0.0215x  frame=  114 fps=1.3 q=-0.0 size=N/A time=00:00:01.90 bitrate=N/A speed=0.0217x  frame=  115 fps=1.3 q=-0.0 size=N/A time=00:00:01.91 bitrate=N/A speed=0.0216x  frame=  116 fps=1.3 q=-0.0 size=N/A time=00:00:01.93 bitrate=N/A speed=0.0215x  frame=  117 fps=1.3 q=-0.0 size=N/A time=00:00:01.95 bitrate=N/A speed=0.0216x  frame=  119 fps=1.3 q=-0.0 size=N/A time=00:00:01.98 bitrate=N/A speed=0.0216x  frame=  120 fps=1.3 q=-0.0 size=N/A time=00:00:02.00 bitrate=N/A speed=0.0215x  frame=  121 fps=1.3 q=-0.0 size=N/A time=00:00:02.01 bitrate=N/A speed=0.0215x  frame=  123 fps=1.3 q=-0.0 size=N/A time=00:00:02.05 bitrate=N/A speed=0.0216x  frame=  124 fps=1.3 q=-0.0 size=N/A time=00:00:02.06 bitrate=N/A speed=0.0216x  frame=  125 fps=1.3 q=-0.0 size=N/A time=00:00:02.08 bitrate=N/A speed=0.0216x  frame=  127 fps=1.3 q=-0.0 size=N/A time=00:00:02.11 bitrate=N/A speed=0.0216x  frame=  128 fps=1.3 q=-0.0 size=N/A time=00:00:02.13 bitrate=N/A speed=0.0216x  frame=  129 fps=1.3 q=-0.0 size=N/A time=00:00:02.15 bitrate=N/A speed=0.0216x  frame=  131 fps=1.3 q=-0.0 size=N/A time=00:00:02.18 bitrate=N/A speed=0.0216x  frame=  132 fps=1.3 q=-0.0 size=N/A time=00:00:02.20 bitrate=N/A speed=0.0216x  frame=  133 fps=1.3 q=-0.0 size=N/A time=00:00:02.21 bitrate=N/A speed=0.0216x  frame=  135 fps=1.3 q=-0.0 size=N/A time=00:00:02.25 bitrate=N/A speed=0.0217x  frame=  136 fps=1.3 q=-0.0 size=N/A time=00:00:02.26 bitrate=N/A speed=0.0216x  frame=  137 fps=1.3 q=-0.0 size=N/A time=00:00:02.28 bitrate=N/A speed=0.0216x  frame=  139 fps=1.3 q=-0.0 size=N/A time=00:00:02.31 bitrate=N/A speed=0.0217x  frame=  140 fps=1.3 q=-0.0 size=N/A time=00:00:02.33 bitrate=N/A speed=0.0216x  frame=  141 fps=1.3 q=-0.0 size=N/A time=00:00:02.35 bitrate=N/A speed=0.0215x  frame=  143 fps=1.3 q=-0.0 size=N/A time=00:00:02.38 bitrate=N/A speed=0.0216x  frame=  144 fps=1.3 q=-0.0 size=N/A time=00:00:02.40 bitrate=N/A speed=0.0216x  frame=  145 fps=1.3 q=-0.0 size=N/A time=00:00:02.41 bitrate=N/A speed=0.0216x  frame=  147 fps=1.3 q=-0.0 size=N/A time=00:00:02.45 bitrate=N/A speed=0.0216x  frame=  148 fps=1.3 q=-0.0 size=N/A time=00:00:02.46 bitrate=N/A speed=0.0216x  frame=  149 fps=1.3 q=-0.0 size=N/A time=00:00:02.48 bitrate=N/A speed=0.0215x  frame=  151 fps=1.3 q=-0.0 size=N/A time=00:00:02.51 bitrate=N/A speed=0.0216x  frame=  152 fps=1.3 q=-0.0 size=N/A time=00:00:02.53 bitrate=N/A speed=0.0216x  frame=  153 fps=1.3 q=-0.0 size=N/A time=00:00:02.55 bitrate=N/A speed=0.0215x  frame=  155 fps=1.3 q=-0.0 size=N/A time=00:00:02.58 bitrate=N/A speed=0.0216x  frame=  156 fps=1.3 q=-0.0 size=N/A time=00:00:02.60 bitrate=N/A speed=0.0215x  frame=  157 fps=1.3 q=-0.0 size=N/A time=00:00:02.61 bitrate=N/A speed=0.0215x  frame=  159 fps=1.3 q=-0.0 size=N/A time=00:00:02.65 bitrate=N/A speed=0.0216x  frame=  160 fps=1.3 q=-0.0 size=N/A time=00:00:02.66 bitrate=N/A speed=0.0216x  frame=  161 fps=1.3 q=-0.0 size=N/A time=00:00:02.68 bitrate=N/A speed=0.0215x  frame=  163 fps=1.3 q=-0.0 size=N/A time=00:00:02.71 bitrate=N/A speed=0.0216x  frame=  164 fps=1.3 q=-0.0 size=N/A time=00:00:02.73 bitrate=N/A speed=0.0216x  frame=  165 fps=1.3 q=-0.0 size=N/A time=00:00:02.75 bitrate=N/A speed=0.0215x  frame=  167 fps=1.3 q=-0.0 size=N/A time=00:00:02.78 bitrate=N/A speed=0.0217x  frame=  168 fps=1.3 q=-0.0 size=N/A time=00:00:02.80 bitrate=N/A speed=0.0216x  frame=  169 fps=1.3 q=-0.0 size=N/A time=00:00:02.81 bitrate=N/A speed=0.0215x  frame=  171 fps=1.3 q=-0.0 size=N/A time=00:00:02.85 bitrate=N/A speed=0.0216x  frame=  172 fps=1.3 q=-0.0 size=N/A time=00:00:02.86 bitrate=N/A speed=0.0216x  frame=  173 fps=1.3 q=-0.0 size=N/A time=00:00:02.88 bitrate=N/A speed=0.0215x  frame=  175 fps=1.3 q=-0.0 size=N/A time=00:00:02.91 bitrate=N/A speed=0.0216x  frame=  176 fps=1.3 q=-0.0 size=N/A time=00:00:02.93 bitrate=N/A speed=0.0215x  frame=  177 fps=1.3 q=-0.0 size=N/A time=00:00:02.95 bitrate=N/A speed=0.0215x  frame=  179 fps=1.3 q=-0.0 size=N/A time=00:00:02.98 bitrate=N/A speed=0.0216x  frame=  180 fps=1.3 q=-0.0 size=N/A time=00:00:03.00 bitrate=N/A speed=0.0215x  frame=  181 fps=1.3 q=-0.0 size=N/A time=00:00:03.01 bitrate=N/A speed=0.0215x  frame=  183 fps=1.3 q=-0.0 size=N/A time=00:00:03.05 bitrate=N/A speed=0.0216x  frame=  184 fps=1.3 q=-0.0 size=N/A time=00:00:03.06 bitrate=N/A speed=0.0215x  frame=  185 fps=1.3 q=-0.0 size=N/A time=00:00:03.08 bitrate=N/A speed=0.0215x  frame=  187 fps=1.3 q=-0.0 size=N/A time=00:00:03.11 bitrate=N/A speed=0.0216x  frame=  188 fps=1.3 q=-0.0 size=N/A time=00:00:03.13 bitrate=N/A speed=0.0215x  frame=  189 fps=1.3 q=-0.0 size=N/A time=00:00:03.15 bitrate=N/A speed=0.0215x  frame=  191 fps=1.3 q=-0.0 size=N/A time=00:00:03.18 bitrate=N/A speed=0.0216x  frame=  192 fps=1.3 q=-0.0 size=N/A time=00:00:03.20 bitrate=N/A speed=0.0215x  frame=  193 fps=1.3 q=-0.0 size=N/A time=00:00:03.21 bitrate=N/A speed=0.0215x  frame=  195 fps=1.3 q=-0.0 size=N/A time=00:00:03.25 bitrate=N/A speed=0.0216x  frame=  196 fps=1.3 q=-0.0 size=N/A time=00:00:03.26 bitrate=N/A speed=0.0215x  frame=  197 fps=1.3 q=-0.0 size=N/A time=00:00:03.28 bitrate=N/A speed=0.0215x  frame=  198 fps=1.3 q=-0.0 size=N/A time=00:00:03.30 bitrate=N/A speed=0.0215x  frame=  200 fps=1.3 q=-0.0 size=N/A time=00:00:03.33 bitrate=N/A speed=0.0215x  frame=  201 fps=1.3 q=-0.0 size=N/A time=00:00:03.35 bitrate=N/A speed=0.0214x  frame=  202 fps=1.3 q=-0.0 size=N/A time=00:00:03.36 bitrate=N/A speed=0.0215x  frame=  204 fps=1.3 q=-0.0 size=N/A time=00:00:03.40 bitrate=N/A speed=0.0215x  frame=  205 fps=1.3 q=-0.0 size=N/A time=00:00:03.41 bitrate=N/A speed=0.0215x  frame=  206 fps=1.3 q=-0.0 size=N/A time=00:00:03.43 bitrate=N/A speed=0.0215x  frame=  208 fps=1.3 q=-0.0 size=N/A time=00:00:03.46 bitrate=N/A speed=0.0215x  frame=  209 fps=1.3 q=-0.0 size=N/A time=00:00:03.48 bitrate=N/A speed=0.0214x  frame=  210 fps=1.3 q=-0.0 size=N/A time=00:00:03.50 bitrate=N/A speed=0.0214x  frame=  212 fps=1.3 q=-0.0 size=N/A time=00:00:03.53 bitrate=N/A speed=0.0214x  frame=  213 fps=1.3 q=-0.0 size=N/A time=00:00:03.55 bitrate=N/A speed=0.0214x  frame=  214 fps=1.3 q=-0.0 size=N/A time=00:00:03.56 bitrate=N/A speed=0.0214x  frame=  216 fps=1.3 q=-0.0 size=N/A time=00:00:03.60 bitrate=N/A speed=0.0214x  frame=  217 fps=1.3 q=-0.0 size=N/A time=00:00:03.61 bitrate=N/A speed=0.0214x  frame=  218 fps=1.3 q=-0.0 size=N/A time=00:00:03.63 bitrate=N/A speed=0.0214x  frame=  220 fps=1.3 q=-0.0 size=N/A time=00:00:03.66 bitrate=N/A speed=0.0214x  frame=  221 fps=1.3 q=-0.0 size=N/A time=00:00:03.68 bitrate=N/A speed=0.0214x  frame=  222 fps=1.3 q=-0.0 size=N/A time=00:00:03.70 bitrate=N/A speed=0.0214x  frame=  224 fps=1.3 q=-0.0 size=N/A time=00:00:03.73 bitrate=N/A speed=0.0214x  frame=  225 fps=1.3 q=-0.0 size=N/A time=00:00:03.75 bitrate=N/A speed=0.0213x  frame=  226 fps=1.3 q=-0.0 size=N/A time=00:00:03.76 bitrate=N/A speed=0.0214x  frame=  228 fps=1.3 q=-0.0 size=N/A time=00:00:03.80 bitrate=N/A speed=0.0214x  frame=  229 fps=1.3 q=-0.0 size=N/A time=00:00:03.81 bitrate=N/A speed=0.0213x  frame=  231 fps=1.3 q=-0.0 size=N/A time=00:00:03.85 bitrate=N/A speed=0.0214x  frame=  232 fps=1.3 q=-0.0 size=N/A time=00:00:03.86 bitrate=N/A speed=0.0214x  frame=  233 fps=1.3 q=-0.0 size=N/A time=00:00:03.88 bitrate=N/A speed=0.0213x  frame=  235 fps=1.3 q=-0.0 size=N/A time=00:00:03.91 bitrate=N/A speed=0.0214x  frame=  236 fps=1.3 q=-0.0 size=N/A time=00:00:03.93 bitrate=N/A speed=0.0214x  frame=  237 fps=1.3 q=-0.0 size=N/A time=00:00:03.95 bitrate=N/A speed=0.0213x  frame=  238 fps=1.3 q=-0.0 size=N/A time=00:00:03.96 bitrate=N/A speed=0.0213x  frame=  240 fps=1.3 q=-0.0 size=N/A time=00:00:04.00 bitrate=N/A speed=0.0213x  frame=  241 fps=1.3 q=-0.0 size=N/A time=00:00:04.01 bitrate=N/A speed=0.0213x  frame=  242 fps=1.3 q=-0.0 size=N/A time=00:00:04.03 bitrate=N/A speed=0.0213x  frame=  244 fps=1.3 q=-0.0 size=N/A time=00:00:04.06 bitrate=N/A speed=0.0213x  frame=  245 fps=1.3 q=-0.0 size=N/A time=00:00:04.08 bitrate=N/A speed=0.0213x  frame=  246 fps=1.3 q=-0.0 size=N/A time=00:00:04.10 bitrate=N/A speed=0.0213x  frame=  248 fps=1.3 q=-0.0 size=N/A time=00:00:04.13 bitrate=N/A speed=0.0214x  frame=  249 fps=1.3 q=-0.0 size=N/A time=00:00:04.15 bitrate=N/A speed=0.0213x  frame=  252 fps=1.3 q=-0.0 size=N/A time=00:00:04.20 bitrate=N/A speed=0.0214x  frame=  253 fps=1.3 q=-0.0 size=N/A time=00:00:04.21 bitrate=N/A speed=0.0213x  frame=  254 fps=1.3 q=-0.0 Lsize=N/A time=00:00:04.23 bitrate=N/A speed=0.0214x    
video:133kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: unknown
[libvmaf @ 0x7ff05a61b300] VMAF score: nan


  


• How to fill/calculate motion_val in FFMPEG ?

  10 février 2015, par MenuItem42

  I’m trying to get motion vectors of a mpeg video via ffmpeg (in c++).
  The problem that I have is, that motion_val along with motion_subsample_log2 and mb_type of the AVFrame class remain empty and/or aren’t initialized (debugger says 0x0) and it seems that they are only available because of compatibility reasons
  I’ve read in the ffmpeg wiki, that you can debug the motion vectors of the video via command line with

  ffmpeg -vismv pf -i input.mp4 output.mp4

  The result is that the output.mp4 has motion vector arrows. So I searched for the –vismv parameter in the code and found in libavcodec\options.c a long list of options :

  {"vismv", "visualize motion vectors (MVs)", OFFSET(debug_mv), FF_OPT_TYPE_INT, DEFAULT, 0, INT_MAX, V|D, "debug_mv"},   

  I suppose that this line affects somehow debug_mv of AVCodecContext. With this assumption I searched for further information and I found some code snippets which I thought might help.

  pAVCodecContext->debug_mv =  FF_DEBUG_VIS_MV_P_FOR | FF_DEBUG_VIS_MV_B_FOR | FF_DEBUG_MB_TYPE | FF_DEBUG_MV;

  and

  pAVCodecContext->debug |= FF_DEBUG_MV;    

  But both didn’t trigger the calculation or filling of the motion_val array.
  By the way my code is based on the code by Victor Hsieh and Jiasi Chen and this code is basically the ffmpeg sourcecode (libavcodec\mpegvideo.c). I also tried to find (also with help of the documentation) the piece of code that triggers the calculation, but because of the complexity of the code I didn’t get any results.
  The question is now, if is there any possibility to fill this variables or start the calculation of the motion vector table or is there any other alternative way to get the motion vectors of every block of the mpeg-frames.

  Edit :

  I forgot to mention my ffmpeg version

  Zeranoe’s FFmpeg version : 2014-07-08 git-14e2406

  • libavutil 52. 91.100 / 52. 91.100
  • libavcodec 55. 68.102 / 55. 68.102
  • libavformat 55. 45.100 / 55. 45.100
  • libavdevice 55. 13.101 / 55. 13.101
  • libavfilter 4. 10.100 / 4. 10.100
  • libswscale 2. 6.100 / 2. 6.100
  • libswresample 0. 19.100 / 0. 19.100
  • libpostproc 52. 3.100 / 52. 3.100

  Changed to a newer version (2.5), but it didn’t change/solve the problem.