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• Support for VP9 high-color/high-bit-depth encoding

  26 mars 2015, par Deb Mukherjee

  Support for VP9 high-color/high-bit-depth encoding
  Patch to support VP9 encoding with new profiles 1-3.
  
  Profile 1 (8-bit 422/444) should work with default libvpx
  
  configuration.
  
  However you will need to configure libvpx with
  
  — enable-vp9-highbitdepth before building and linking
  
  with ffmpeg for profile 2 (10-/12-bit 420) and profile 3
  
  (10-/12-bit 422/444) encoding.
  You may use the appropriate profile option on the
  
  command line :
  
   profile:v 1 for 422/444 8-bit encoding
  
   profile:v 2 for 420 10-/12- bit encoding
  
   profile:v 3 for 422/444 10-/12-bit encoding
  
  If you do not use the -profile:v option, it will be deduced
  
  from the source format.
  Signed-off-by : James Zern <jzern@google.com>
  

  • [DH] libavcodec/libvpx.c
  • [DH] libavcodec/libvpxenc.c

• lavc/flac : Fix encoding and decoding with high lpc.

  12 mai 2015, par Carl Eugen Hoyos

  lavc/flac : Fix encoding and decoding with high lpc.
  Based on an analysis by trac user lvqcl.
  Fixes ticket #4421, reported by Chase Walker.
  

  • [DH] doc/decoders.texi
  • [DH] libavcodec/arm/flacdsp_init_arm.c
  • [DH] libavcodec/flacdec.c
  • [DH] libavcodec/flacdsp.c
  • [DH] libavcodec/flacdsp.h
  • [DH] libavcodec/flacenc.c
  • [DH] libavcodec/version.h
  • [DH] libavcodec/x86/flacdsp_init.c

• Not able to change H264 profile to High from Main using FFMPEG API

  7 juin 2015, par AsG

  I am using QtFFMPEG wrapper(https://code.google.com/p/qtffmpegwrapper/) with Qt 5.4 and MSCV 2012. I want to encode a mp4 video from image files at 25 fps and high profile.
  I used the createFile() and encodeImage() functions from here

  I am using the below parameters :

  pCodecCtx=pVideoStream->codec;
  
  pCodecCtx->codec_id = pOutputFormat->video_codec;
  
  pCodecCtx->codec_type = ffmpeg::AVMEDIA_TYPE_VIDEO;
  
  pCodecCtx->profile=FF_PROFILE_H264_HIGH;
  
  pCodecCtx->bit_rate = Bitrate;
  
  pCodecCtx->width = getWidth();
  
  pCodecCtx->height = getHeight();
  
  pCodecCtx->time_base.den = fps;
  
  pCodecCtx->time_base.num = 1;
  
  pCodecCtx->gop_size = 10;
  
  pCodecCtx->pix_fmt = ffmpeg::PIX_FMT_YUV420P;
  
  pCodecCtx->qmin = 10;
  
  pCodecCtx->qmax = 51;

  The FFMPEG variables are :

  License: %s
  
   GPL version 3 or later
  
  AVCodec version %d
  
   3476480
  
  AVFormat configuration: %s
  
   --disable-static --enable-shared --enable-gpl --enable-version3 --enable-runtime-cpudetect --enable-avisynth --enable-bzlib --enable-frei0r --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libfreetype --enable-libgsm --enable-libmp3lame --enable-libopenjpeg --enable-librtmp --enable-libschroedinger --enable-libspeex --enable-libtheora --enable-libvo-aacenc --enable-libvo-amrwbenc --enable-libvorbis --enable-libvpx --enable-libx264 --enable-libxavs --enable-libxvid --enable-zlib

  Now I currently get a video with below properties :

  ID                             : 1
  
  Format                         : AVC
  
  Format/Info                    : Advanced Video Codec
  
  Format profile                 : Main@L3.2
  
  Format settings, CABAC         : No
  
  Format settings, ReFrames      : 1 frame
  
  Format settings, GOP           : M=1, N=10
  
  Codec ID                       : avc1
  
  Codec ID/Info                  : Advanced Video Coding
  
  Duration                       : 4s 320ms

  I want the profile to be "High" and the CABAC to be yes with 3 ReFrames. How do I achieve that ? I tried setting the profile, coder_type and max_b_frames but did not help. At times the generated file did not even play. Can anyone help please. Thanks.

  I also tried using the av_opt_set() way but could not find that function. Only function I have is av_opt_set_dict(), am I missing something - outdated FFMPEG or missing #include.

  Tried this too, didnt help-

     ffmpeg::AVDictionary *opt = NULL;
  
     int iRes = av_dict_set(&opt, "profile", "high", 0);
  
     av_opt_set_dict(pFormatCtx->priv_data, &opt);
  
     av_opt_set_dict(pFormatCtx, &opt);

  Please help.

  EDIT :
  I got a high quality mp4 by changing the qmin and qmax values and then reencoding the big sized output via command line. I will try to upgrade the FFMPEG as suggested by Ronald below. Please consider the question closed for now.