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• Encoding h.264 with libavcodec/x264

  21 décembre 2010, par Leviathan

  I am attempting to encode video using libavcodec/libavformat. I'm trying to change the standard output-example.c from ffmpeg source. The AVI file is created on the disk, but the only sound is encoded. I tried adding a lot of options for x264 from here. All the other codecs works fine, mpeg2, mpeg4, mjpeg, xvid. In addition to specifying the parameters x264, I also set the codec to AVOutputFormat structure. That's all I've done.

    AVOutputFormat  *pOutFormat;  // in header file
    av_register_all();
    AVCodec *codec = avcodec_find_encoder_by_name("libx264");
    pOutFormat = guess_format("avi", NULL, NULL);
    pOutFormat->video_codec = codec->id;
  

  The debug output of my application:

  Output #0, mp4, to 'D:\1.avi':
      Stream #0.0: Video: libx264, yuv420p, 320x240, q=10-51, 500 kb/s, 90k tbn, 25 tbc
      Stream #0.1: Audio: aac, 44100 Hz, 1 channels, s16, 128 kb/s
  [libx264 @ 0x694010]using cpu capabilities: MMX2 SSE2Fast SSSE3 FastShuffle SSE4.2
  [libx264 @ 0x694010]bitrate tolerance too small, using .01
  [libx264 @ 0x694010]profile Main, level 2.0
  [libx264 @ 0x694010]frame I:150   Avg QP:14.76  size:  2534
  [libx264 @ 0x694010]mb I  I16..4: 75.9%  0.0% 24.1%
  [libx264 @ 0x694010]final ratefactor: 17.57
  [libx264 @ 0x694010]coded y,uvDC,uvAC intra: 42.7% 92.4% 47.4%
  [libx264 @ 0x694010]i16 v,h,dc,p: 11% 14%  2% 73%
  [libx264 @ 0x694010]i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 21% 18% 29%  5%  8% 10%  3%  3%  2%
  [libx264 @ 0x694010]kb/s:506.79