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• h264 encoder other than x264

  2 juin 2014, par TMMDev

  i want to encode H264 packets and send them as RTP.
  x264 is great, but it is under GPL license, and requires me to open source my project

  is there an equivalent library to x264 which does not require to publish my source code ?

  Thank you.

• Revision 773596050f : Fix decoder mismatch in sub-pixel AVX2 intrinsic filters The subpixel SSSE3 was

  24 mai 2014, par levytamar82

  Changed Paths :
   Modify /vp9/common/x86/vp9_subpixel_8t_intrin_avx2.c

  
  
  Fix decoder mismatch in sub-pixel AVX2 intrinsic filters

  The subpixel SSSE3 was fixed in this patch :
  https://gerrit.chromium.org/gerrit/#/c/70283/
  So the equivalent AVX2 is fixed accordingly.

  Change-Id : Ieebbc1949c99d34b12b8b47692df71aca5001f3a

• How to force usage of specific codec with ffmpeg ?

  4 septembre 2013, par Srv19

  I am trying to read a certain video file using ffmpeg, and have run into a bit of trouble.

  This is the code that starts to read it :

  int _tmain(int argc, _TCHAR* argv[])
  
  {
  
      if (argc < 2)
  
      {
  
          fprintf( stderr, "Filename is needed as an argument\n" );  
  
          return 1;  
  
      }
  
      /* register all formats and codecs */
  
      av_register_all();
  
      AVFormatContext* fmt_ctx = NULL;
  
      /* open input file, and allocate format context */
  
      const char *src_filename = argv[1];
  
      if (avformat_open_input(&fmt_ctx, src_filename, NULL, NULL) < 0) {
  
          fprintf(stderr, "Could not open source file %s\n", src_filename);
  
          abort();
  
      }
  
      /* retrieve stream information */
  
      AVDictionary *      options;
  
      int res = avformat_find_stream_info(fmt_ctx, &options);
  
      if (res < 0) {
  
          fprintf(stderr, "Could not find stream information\n");
  
          abort();
  
      }
  
      ...
  
  }

  I am consistently getting the following message :

  [avi @ 005f2fe0] Could not find codec parameters for stream 0 (Video :
  none (GREY / 0x59455247), 1280x1024) : unknown codec

  Consider increasing the value for the 'analyzeduration' and 'probesize' options

  I get the same message when i run ffmpeg tool on the same file.

  However, i know what is in the video stream - raw video data with YUV8 format. In fact, when i pass that to ffmpeg via -c:v rawvideo option, there is no problem. Recoding, transforming etc - ffmpeg does it like the magic tool it is.

  Now, the question is : when using ffmpeg api, what is the equivalent of that option ? I desperately need access to the frames of file.