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• avcodec : add metadata to identify wrappers and hardware decoders

  11 décembre 2017, par wm4

  avcodec : add metadata to identify wrappers and hardware decoders
  Explicitly identify decoder/encoder wrappers with a common name. This
  
  saves API users from guessing by the name suffix. For example, they
  
  don't have to guess that "h264_qsv" is the h264 QSV implementation, and
  
  instead they can just check the AVCodec .codec and .wrapper_name fields.
  Explicitly mark AVCodec entries that are hardware decoders or most
  
  likely hardware decoders with new AV_CODEC_CAPs. The purpose is allowing
  
  API users listing hardware decoders in a more generic way. The proposed
  
  AVCodecHWConfig does not provide this information fully, because it's
  
  concerned with decoder configuration, not information about the fact
  
  whether the hardware is used or not.
  AV_CODEC_CAP_HYBRID exists specifically for QSV, which can have software
  
  implementations in case the hardware is not capable.
  Based on a patch by Philip Langdale <philipl@overt.org>.
  Merges Libav commit 47687a2f8aca3f65b6fdd117b1cb66a7409a7fd1.
  

  • [DH] doc/APIchanges
  • [DH] libavcodec/audiotoolboxdec.c
  • [DH] libavcodec/audiotoolboxenc.c
  • [DH] libavcodec/avcodec.h
  • [DH] libavcodec/crystalhd.c
  • [DH] libavcodec/cuviddec.c
  • [DH] libavcodec/libcelt_dec.c
  • [DH] libavcodec/libfdk-aacdec.c
  • [DH] libavcodec/libfdk-aacenc.c
  • [DH] libavcodec/libgsmdec.c
  • [DH] libavcodec/libgsmenc.c
  • [DH] libavcodec/libilbc.c
  • [DH] libavcodec/libkvazaar.c
  • [DH] libavcodec/libmp3lame.c
  • [DH] libavcodec/libopencore-amr.c
  • [DH] libavcodec/libopenh264dec.c
  • [DH] libavcodec/libopenh264enc.c
  • [DH] libavcodec/libopenjpegdec.c
  • [DH] libavcodec/libopenjpegenc.c
  • [DH] libavcodec/libopusdec.c
  • [DH] libavcodec/libopusenc.c
  • [DH] libavcodec/librsvgdec.c
  • [DH] libavcodec/libshine.c
  • [DH] libavcodec/libspeexdec.c
  • [DH] libavcodec/libspeexenc.c
  • [DH] libavcodec/libtheoraenc.c
  • [DH] libavcodec/libtwolame.c
  • [DH] libavcodec/libvo-amrwbenc.c
  • [DH] libavcodec/libvorbisenc.c
  • [DH] libavcodec/libvpxdec.c
  • [DH] libavcodec/libvpxenc.c
  • [DH] libavcodec/libwavpackenc.c
  • [DH] libavcodec/libwebpenc.c
  • [DH] libavcodec/libwebpenc_animencoder.c
  • [DH] libavcodec/libx264.c
  • [DH] libavcodec/libx265.c
  • [DH] libavcodec/libxavs.c
  • [DH] libavcodec/libxvid.c
  • [DH] libavcodec/libzvbi-teletextdec.c
  • [DH] libavcodec/mediacodecdec.c
  • [DH] libavcodec/mmaldec.c
  • [DH] libavcodec/nvenc_h264.c
  • [DH] libavcodec/nvenc_hevc.c
  • [DH] libavcodec/qsvdec_h2645.c
  • [DH] libavcodec/qsvdec_other.c
  • [DH] libavcodec/qsvenc_h264.c
  • [DH] libavcodec/qsvenc_hevc.c
  • [DH] libavcodec/qsvenc_jpeg.c
  • [DH] libavcodec/qsvenc_mpeg2.c
  • [DH] libavcodec/rkmppdec.c
  • [DH] libavcodec/v4l2_m2m_dec.c
  • [DH] libavcodec/v4l2_m2m_enc.c
  • [DH] libavcodec/vaapi_encode_h264.c
  • [DH] libavcodec/vaapi_encode_h265.c
  • [DH] libavcodec/vaapi_encode_mjpeg.c
  • [DH] libavcodec/vaapi_encode_mpeg2.c
  • [DH] libavcodec/vaapi_encode_vp8.c
  • [DH] libavcodec/vaapi_encode_vp9.c
  • [DH] libavcodec/version.h
  • [DH] libavcodec/videotoolboxenc.c

• avcodec/av1dec : export pixel format even if no hardware decoder is present

  7 septembre 2023, par James Almer

  avcodec/av1dec : export pixel format even if no hardware decoder is present
  And remove the AVOID_PROBING flag, given it's the last av1 decoder to be tested
  
  either way.
  
  This fixes a regression introduced in 1652f2492f88434010053289d946dab6a57e4d58,
  
  where even if forcing the native av1 decoder, if another decoder was present,
  
  like libdav1d or libaom-av1, they'd be used for probing and some fate tests
  
  would have different results.
  Signed-off-by : James Almer <jamrial@gmail.com>
  

  • [DH] libavcodec/av1dec.c
  • [DH] tests/fate-run.sh
  • [DH] tests/fate/flvenc.mak
  • [DH] tests/fate/lavf-container.mak
  • [DH] tests/fate/mpegps.mak
  • [DH] tests/ref/fate/av1-annexb-demux
  • [DH] tests/ref/lavf-fate/av1.mkv
  • [DH] tests/ref/lavf-fate/av1.mp4

• How to decode in ffmpeg using hardware (avcodec_parameters_to_context problem)

  25 juillet 2020, par Guerlando OCs

        AVCodecContext *ctx= NULL;
      AVCodecParameters *origin_par = NULL;


      result = avcodec_parameters_to_context(ctx, origin_par);
      if (result) {
          av_log(NULL, AV_LOG_ERROR, "Can't copy decoder context\n");
          return result;
      }


  


  where origin_par is filled by opening the file and reading some of its things :

  


     result = avformat_open_input(&fmt_ctx, input_filename, NULL, NULL);
   if (result < 0) {
       av_log(NULL, AV_LOG_ERROR, "Can't open file\n");
       return result;
   }

   result = avformat_find_stream_info(fmt_ctx, NULL);
   if (result < 0) {
       av_log(NULL, AV_LOG_ERROR, "Can't get stream info\n");
       return result;
   }

   video_stream = av_find_best_stream(fmt_ctx, AVMEDIA_TYPE_VIDEO, -1, -1, NULL, 0);
   if (video_stream < 0) {
     av_log(NULL, AV_LOG_ERROR, "Can't find video stream in input file\n");
     return -1;
   }

   origin_par = fmt_ctx->streams[video_stream]->codecpar;


  


  However, I don't have a file, I have an h264 stream. How do I make it work then ? I need a way to fill the parameters to the context using avcodec_parameters_to_context but without opening a file.