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• avcodec/snowenc : change log level for iterative ME information to debug level

  10 mai 2015, par Michael Niedermayer

  avcodec/snowenc : change log level for iterative ME information to debug level
  The printed stuff should be useless to the average user and its certainly
  
  not an error.
  Signed-off-by : Michael Niedermayer <michaelni@gmx.at>
  

  • [DH] libavcodec/snowenc.c

• Revision eb8c667570 : Force_split on 16x16 blocks in variance partition. Force split on 16x16 block (

  18 mars 2015, par Marco

  Changed Paths :
   Modify /vp9/common/vp9_rtcd_defs.pl

  
   Modify /vp9/encoder/vp9_avg.c

  
   Modify /vp9/encoder/vp9_encodeframe.c

  
   Modify /vp9/encoder/vp9_encoder.h

  
   Modify /vp9/encoder/x86/vp9_avg_intrin_sse2.c

  
  
  Force_split on 16x16 blocks in variance partition.

  Force split on 16x16 block (to 8x8) based on the minmax over the 8x8 sub-blocks.

  Also increase variance threshold for 32x32, and add exit condiiton in
  choose_partition
  (with very safe threshold) based on sad used to select reference frame.

  Some visual improvement near moving boundaries.
  Average gain in psnr/ssim : 0.6%, some clips go up 1 or 2%.
  Encoding time increase (due to more 8x8 blocks) from 1-4%, depending on clip.

  Change-Id : I4759bb181251ac41517cd45e326ce2997dadb577

• ffmpeg library performance for decoding h.264 for embedded device

  2 avril 2015, par pasifus

  I have some confuse when tried to compile and run decode h.264 on ARM and MIPS architecture.

  I have two embedded devices. I tired to run simple code that read h264 format from file and decode it to h264 in loop in maximum speed (without sleep between frames)

  I found that it too slow in there devices.
  I tested HD video (720p/25fps)

  1. MIPS32® 1004K (700MHz) it was 4 fps average.
  2. Raspberry Pi Model B (700MHz) it also was 4 fps average. (i know that raspberry have GPU to decoding/encoding)

  A also check it on my virtual machine on ubuntu i686 (1300MHz) and it was 200 fps average.

  The question : why it so different preference ? Somebody know how to increase decoding preference on MIPS32® 1004K architecture ?

  #include 
  
  #include 
  
  #include 
  
  #include 
  
  
  
  #include <sys></sys>time.h>
  
  #include 
  
  
  
  #include "libavcodec/avcodec.h"
  
  #include "libavutil/mathematics.h"
  
  
  
  #define INBUF_SIZE 80000
  
  
  
  
  
  static long get_time_diff(struct timeval time_now) {
  
     struct timeval time_now2;
  
     gettimeofday(&amp;time_now2,0);
  
     return time_now2.tv_sec*1.e6 - time_now.tv_sec*1.e6 + time_now2.tv_usec - time_now.tv_usec;
  
  }
  
  
  
  int main(int argc, char **argv)
  
  {
  
      AVCodec *codec;
  
      AVCodecContext *c= NULL;
  
      AVCodecParserContext *parser = NULL;
  
      int frame, got_picture, len2, len;
  
      const char *filename;
  
      FILE *f;
  
      AVFrame *picture;
  
      char *arghwtf = malloc(INBUF_SIZE);
  
      uint64_t in_len;
  
      int pts, dts;
  
      struct timeval t,t2;
  
      float inv_fps = 1e6/23.98;
  
      AVPacket avpkt;
  
  
  
      // register all the codecs
  
      avcodec_register_all();
  
  
  
      // log level
  
      av_log_set_level(AV_LOG_PANIC|AV_LOG_FATAL|AV_LOG_ERROR|AV_LOG_WARNING);
  
  
  
      filename = argv[1];
  
  
  
      av_init_packet(&amp;avpkt);
  
  
  
      printf("Decoding file %s...\n", filename);
  
  
  
      // find the H.264 video decoder
  
      codec = avcodec_find_decoder(CODEC_ID_H264);
  
      if (!codec)
  
      {
  
          fprintf(stderr, "codec not found\n");
  
          exit(1);
  
      }
  
  
  
      c = avcodec_alloc_context3(codec);
  
      picture = avcodec_alloc_frame();
  
  
  
      // skiploopfilter=all
  
      c->skip_loop_filter = 48;
  
  
  
      AVDictionary* dictionary = NULL;
  
      if (avcodec_open2(c, codec, &amp;dictionary) &lt; 0)
  
      {
  
          fprintf(stderr, "could not open codec\n");
  
          exit(1);
  
      }
  
  
  
      // the codec gives us the frame size, in samples
  
      parser = av_parser_init(c->codec_id);
  
      parser->flags |= PARSER_FLAG_ONCE;
  
  
  
      f = fopen(filename, "rb");
  
      if (!f)
  
      {
  
          fprintf(stderr, "could not open %s\n", filename);
  
          exit(1);
  
      }
  
  
  
      frame = 0;
  
      gettimeofday(&amp;t, 0);
  
      if(fread(arghwtf, 1, INBUF_SIZE, f) == 0)
  
      {
  
          exit(1);
  
      }
  
  
  
      in_len = 80000;
  
      gettimeofday(&amp;t2, 0);
  
      while (in_len > 0 &amp;&amp; !feof(f))
  
      {
  
          len = av_parser_parse2(parser, c, &amp;avpkt.data, &amp;avpkt.size, arghwtf, in_len, pts, dts, AV_NOPTS_VALUE);
  
  
  
          len2 = avcodec_decode_video2(c, picture, &amp;got_picture, &amp;avpkt);
  
          if (len2 &lt; 0) {
  
              fprintf(stderr, "Error while decoding frame %d\n", frame);
  
              exit(1);
  
          }
  
  
  
          if (got_picture)
  
          {
  
              fprintf(stderr, "\rDisplaying %c %dx%d :frame %3d (%02d:%03d)...", av_get_picture_type_char(picture->pict_type), c->width, c->height, frame, (int)(get_time_diff(t)/1000000), (int)((get_time_diff(t)/1000)%1000));
  
              fflush(stderr);
  
  
  
              frame++;
  
          }
  
  
  
          memcpy(arghwtf, arghwtf + len, 80000-len);
  
          fread(arghwtf + 80000 - len, 1, len, f);
  
      }
  
  
  
      fclose(f);
  
      avcodec_close(c);
  
      av_free(c);
  
      av_free(picture);
  
      printf("\n");
  
      printf("Avarage fps: %d\n", (int)(((double)frame)/(double)(get_time_diff(t)/1000)*1000));
  
  
  
      return 0;
  
  }