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• lavu : add new D3D11 pixfmt and hwcontext

  6 juin 2017, par wm4

  lavu : add new D3D11 pixfmt and hwcontext
  To be used with the new d3d11 hwaccel decode API.
  With the new hwaccel API, we don’t want surfaces to depend on the
  
  decoder (other than the required dimension and format). The old D3D11VA
  
  pixfmt uses ID3D11VideoDecoderOutputView pointers, which include the
  
  decoder configuration, and thus is incompatible with the new hwaccel
  
  API. This patch introduces AV_PIX_FMT_D3D11, which uses ID3D11Texture2D
  
  and an index. It’s simpler and compatible with the new hwaccel API.
  The introduced hwcontext supports only the new pixfmt.
  Frame upload code untested.
  Significantly based on work by Steve Lhomme <robux4@gmail.com>, but with
  
  heavy changes/rewrites.
  Signed-off-by : Diego Biurrun <diego@biurrun.de>
  

  • [DBH] doc/APIchanges
  • [DBH] libavutil/Makefile
  • [DBH] libavutil/hwcontext.c
  • [DBH] libavutil/hwcontext.h
  • [DBH] libavutil/hwcontext_d3d11va.c
  • [DBH] libavutil/hwcontext_d3d11va.h
  • [DBH] libavutil/hwcontext_internal.h
  • [DBH] libavutil/pixdesc.c
  • [DBH] libavutil/pixfmt.h
  • [DBH] libavutil/version.h

• FFmpeg API example (encode_video.c) does not work correctly

  30 janvier 2023, par NewbieCoder

  I am using the official encode_video.c example to test if FFmpeg works correctly for me. 
I got the pre-built windows edition from ffmpeg.zeranoe.com/builds. It is built already with libx264 and other external libraries. I got both dev and shared editions and added the DLLs, header files and libs accordingly in Visual Studio.

  



  Now the encode_video.c example does not work correctly.

  



  



  What I tried :

  



  I compiled the example and run it on many different file formats and codecs such as the following.

  



  First I tried all of these file formats (.mp4, .m4v, .h264, .x264, .avi, .flv) with codec name as libx264. The code executed without errors but the output video file did not play in VLC or Windows 10 default player.

  



  Next, I tried all of those above file formats but with codec name as mpeg4. The code executed without errors but the output video file played only for .m4v in VLC.

  



  



  What is expected :

  



  All of those combinations should have produced a video file which could be played in VLC. None of them worked except for .m4v as file format and mpeg4 as codec name.

  



  



  Please tell me how to make this work for h264. I mainly want it to work for h264 as that is only important for now.

  



  I am running the code like ./encode_video.exe test.mp4 libx264 where first argument is output filename and second argument is codec name.

  



  This is the output for test.mp4 and libx264 as command line arguments https://imgur.com/a/AHLQwuK

  



  It seems that in the encode function, it goes over the below code and returns because of AVERROR(EAGAIN) or AVERROR_EOF. Please tell me what is happening.

  



  while (ret >= 0) {
        ret = avcodec_receive_packet(enc_ctx, pkt);
        if (ret == AVERROR(EAGAIN) || ret == AVERROR_EOF)
            return;
        else if (ret < 0) {
            fprintf(stderr, "Error during encoding\n");
            exit(1);
        }

        printf("Write packet %3"PRId64" (size=%5d)\n", pkt->pts, pkt->size);
        fwrite(pkt->data, 1, pkt->size, outfile);
        av_packet_unref(pkt);
    }


  



  I used DepenciesGUI to find out the DLLs linked and it shows that the DLLs are correctly linked. Please help me figure out what the problem is now !!

  


• avcodec/proresenc_aw : use for frame flag in the header the same value than the offic...

  8 octobre 2018, par Martin Vignali

  avcodec/proresenc_aw : use for frame flag in the header the same value than the official encoder
  

  • [DH] libavcodec/proresenc_anatoliy.c
  • [DH] tests/ref/vsynth/vsynth1-prores
  • [DH] tests/ref/vsynth/vsynth2-prores
  • [DH] tests/ref/vsynth/vsynth3-prores
  • [DH] tests/ref/vsynth/vsynth_lena-prores