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• In using FFmpeg SDK, the mp4 file encoded with HEVC(x265) codec not playing in general player

  26 octobre 2016, par Wiktor Kostus

  Everyone !

  I am going to encode mp4 file (x264 codec) to HEVC(x265) codec using FFmpeg SDK.
  Also, I am going to write the encoded file into .mp4 file container.

  The problem I am facing is that the encoded file is played well in FFplay and VLC player but it isn’t played in general HEVC player.

  I used the general method to encode the codec in FFmpeg SDK. I think I have a mistake to use the avformat_write_header() function. It seems that some parameters to pass AVFormatContext, AVOutputFormat or AVCodecContext for HEVC codec are missing.

  Finally, I would like to know the way to write the HEVC codec into mp4 container. I also would like to know the right parameters related to Context instances for HEVC codec.

  Below is my tiny demo code. (I have skipped the code related to InputStream since I think I have a mistake in OutputStream)

  AVFormatContext* pFormatCtx;
  
  AVOutputFormat* fmt;
  
  AVStream* video_st;
  
  AVCodecContext* pCodecCtx;
  
  
  
  const char* out_file = "output.mp4";
  
  
  
  pFormatCtx = avformat_alloc_context();
  
  fmt = av_guess_format(NULL, out_file, NULL);
  
  pFormatCtx->oformat = fmt;
  
  
  
  if (avio_open(&pFormatCtx->pb, out_file, AVIO_FLAG_READ_WRITE) < 0){
  
      printf("Failed to open output file! \n");
  
      return -1;
  
  }
  
  
  
  video_st = avformat_new_stream(pFormatCtx, 0);
  
  video_st->time_base.num = 1; 
  
  video_st->time_base.den = 25;  
  
  
  
  if (video_st==NULL){
  
      return -1;
  
  }
  
  //Param that must set
  
  pCodecCtx = video_st->codec;
  
  pCodecCtx->codec_id =AV_CODEC_ID_HEVC;
  
  pCodecCtx->codec_id = fmt->video_codec;
  
  pCodecCtx->codec_type = AVMEDIA_TYPE_VIDEO;
  
  pCodecCtx->pix_fmt = PIX_FMT_YUV420P;
  
  pCodecCtx->width = in_w;  
  
  pCodecCtx->height = in_h;
  
  pCodecCtx->time_base.num = 1;  
  
  pCodecCtx->time_base.den = 25;  
  
  pCodecCtx->bit_rate = 400000;  
  
  pCodecCtx->gop_size=250;
  
  pCodecCtx->qmin = 10;
  
  pCodecCtx->qmax = 51;
  
  pCodecCtx->max_b_frames = 1;
  
  
  
  // Set Option
  
  AVDictionary *param = 0;
  
  av_dict_set(&param, "preset", "ultrafast", 0);
  
  av_dict_set(&param, "tune", "zero-latency", 0);
  
  av_dict_set(&param, "x265-params", "crf=25", 0);
  
  
  
  pCodec = avcodec_find_encoder(pCodecCtx->codec_id);
  
  if (!pCodec){
  
      printf("Can not find encoder! \n");
  
      return -1;
  
  }
  
  if (avcodec_open2(pCodecCtx, pCodec,&param) < 0){
  
      printf("Failed to open encoder! \n");
  
      return -1;
  
  }
  
  
  
  //Write File Header
  
  avformat_write_header(pFormatCtx, NULL); <------ I think it takes any error in here.

  Help me what I am doing wrong.

  Thank you for your consider.

• Revision b62ddd5f8b : General code cleanup. Switching from mi_{width, height}_log2 and b_{width, heig

  28 août 2013, par Dmitry Kovalev

  Changed Paths :
   Modify /vp9/decoder/vp9_decodframe.c

  
   Modify /vp9/encoder/vp9_bitstream.c

  
   Modify /vp9/encoder/vp9_encodeframe.c

  
   Modify /vp9/encoder/vp9_rdopt.c

  
  
  General code cleanup.

  Switching from mi_width, height_log2 and b_width, height_log2 to
  num_8x8_blocks_wide, high and num_4x4_blocks_wide, high. Removing
  redundant code, adding const.

  Change-Id : Iaab2207590fd24d0b76999071778d1395dc5cd5d

• Revert "avformat/mov : ignore item boxes for animated heif"

  29 mars 2024, par James Almer

  Revert "avformat/mov : ignore item boxes for animated heif"
  This reverts commit f6b7b473d456a6aa1c063c4261b17277e2c70ac0.
  
  The image in the item boxes and the animation in the trak box are not
  
  necessarely the same, so both should be exported.
  Signed-off-by : James Almer <jamrial@gmail.com>
  

  • [DH] libavformat/mov.c