[FFmpeg-devel] memory leak in h264 decoder?

[tuitfun]

Hello,

I've written a small test program that decodes video and seeks a lot. Its
memory usage keeps going up, as high as 150 MB, until the end of the program
when decoding h264 files . With xvid files, memory usage seems to be constant
from start to finish at less than 50 MB. So, I am suspecting that there might
be 
memory leaks in the h264 decoder. With some h264 files, the program couldn't 
even run to the end and gave many errors:
[h264 @ 688A7640]get_buffer() failed (-1 559755355 825042976 5F65646F)
[h264 @ 688A7640]decode_slice_header error
[h264 @ 688A7640]no frame!
[h264 @ 688A7640]pic->data[0]!=NULL in avcodec_default_get_buffer
[h264 @ 688A7640]get_buffer() failed (-1 559755355 825042976 5F65646F)
[h264 @ 688A7640]decode_slice_header error
[h264 @ 688A7640]no frame!
[h264 @ 688A7640]pic->data[0]!=NULL in avcodec_default_get_buffer
[h264 @ 688A7640]get_buffer() failed (-1 559755355 825042976 5F65646F)
[h264 @ 688A7640]decode_slice_header error
[h264 @ 688A7640]no frame!

I was testing this program in windows xp with ffmpeg revision 10408 which has
been configured with: ./configure --prefix=/usr/local --enable-memalign-hack
--enable-static --enable-shared --enable-gpl --enable-swscaler
--enable-libamr-nb --enable-libamr-wb --enable-libfaad --enable-libgsm
--disable-encoders --disable-muxers --disable-bsfs --disable-network
--disable-vhook --disable-ffmpeg --disable-ffserver --disable-ffplay
--extra-ldflags=-L/usr/local/lib --extra-cflags=-I/usr/local/include
--disable-protocol=http --disable-protocol=rtp --disable-protocol=tcp
--disable-protocol=udp

If it's something wrong with my test program, please let me know. :)

Thanks a lot,
tuit

// modified from http://www.dranger.com/ffmpeg/tutorial01.c
#include <ffmpeg/avcodec.h>
#include <ffmpeg/avformat.h>

#include <stdio.h>

int main(int argc, char *argv[]) {
  AVFormatContext *pFormatCtx;
  int             i, videoStream;
  AVCodecContext  *pCodecCtx;
  AVCodec         *pCodec;
  AVFrame         *pFrame; 
  AVPacket        packet;
  int             got_picture;
  
  if(argc < 2) {
    printf("Please provide a movie file\n");
    return -1;
  }
  // Register all formats and codecs
  av_register_all();
  
  // Open video file
  if(av_open_input_file(&pFormatCtx, argv[1], NULL, 0, NULL)!=0)
    return -1; // Couldn't open file
  
  // Retrieve stream information
  if(av_find_stream_info(pFormatCtx)<0)
    return -1; // Couldn't find stream information
  
  // Dump information about file onto standard error
  dump_format(pFormatCtx, 0, argv[1], 0);
  
  // Find the first video stream
  videoStream=-1;
  for(i=0; i<pFormatCtx->nb_streams; i++)
    if(pFormatCtx->streams[i]->codec->codec_type==CODEC_TYPE_VIDEO) {
      videoStream=i;
      break;
    }
  if(videoStream==-1)
    return -1; // Didn't find a video stream
  AVStream *pStream = pFormatCtx->streams[videoStream];
  
  // Get a pointer to the codec context for the video stream
  pCodecCtx=pFormatCtx->streams[videoStream]->codec;
  
  // Find the decoder for the video stream
  pCodec=avcodec_find_decoder(pCodecCtx->codec_id);
  if(pCodec==NULL) {
    fprintf(stderr, "Unsupported codec!\n");
    return -1; // Codec not found
  }
  // Open codec
  if(avcodec_open(pCodecCtx, pCodec)<0)
    return -1; // Could not open codec
  
  // Allocate video frame
  pFrame=avcodec_alloc_frame();

  // Read frames
  int64_t timestamp = 0;
  i=0;
  while(av_read_frame(pFormatCtx, &packet)==0) {
    // Is this a packet from the video stream?
    if(packet.stream_index==videoStream) {
      // Decode video frame
      avcodec_decode_video(pCodecCtx, pFrame, &got_picture, 
        packet.data, packet.size);
      
      // Did we get a key video frame?
      if(got_picture && 1 == pFrame->key_frame) {
        fprintf(stderr, "k");

        // seek 60 seconds
        timestamp += 60.0 / av_q2d(pStream->time_base);
        if (av_seek_frame(pFormatCtx, videoStream, timestamp, 0) < 0) { //
failed
            break;
        }
        avcodec_flush_buffers(pCodecCtx);
      }
    }
    
    // Free the packet that was allocated by av_read_frame
    av_free_packet(&packet);
  }
  // last packet might not get freed
  fprintf(stderr, "\n");

  // Free the YUV frame
  av_free(pFrame);
  
  // Close the codec
  avcodec_close(pCodecCtx);
  
  // Close the video file
  av_close_input_file(pFormatCtx);
  
  return 0;
}



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