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• FFMPEG c++ memory leak issue when reading the packet

  19 novembre 2020, par santosh

  I have written a program to read the frames from a video file. Everything works perfect except below described issue.
after reading the frame, when I call avcode_send_packet function, it leaks the memory.
I used av_packet_unref before reading the next frame. But still the memory leak is not resolved.
I am using FFMPEG latest 4.3 version on WIndows 10.

  


  also av_frame_unref does not fix the memory leak. I think data buffer inside the packet does not get freed somehow I feel it is related to FFMPEG version issue as I see the similar coding done by other programmers on the internet.

  


  Does any one have idea about how to fix this memory leak ?

  


  ----------------- code is as below-----------------------
... here code related to setting avformatcontext, and avcodeccontext.

  


  while(1)
    {
        if (av_read_frame(pFormatCtx, packet) >= 0)
        {
            if (packet->stream_index == videoindex)
            {

                ret = avcodec_send_packet(pCodecCtx, packet);//on executing this line, memory shoots up in MBs , everytime.
                if (ret < 0)
                {
                    av_packet_unref(packet);
                    fprintf(stderr,"Failed to Decode packet. \n:%s", av_err2str(ret));
                    return -1;
                }

                ret = avcodec_receive_frame(pCodecCtx, pAvFrame);
                if (ret == AVERROR(EAGAIN) || ret == AVERROR_EOF)
                {
                    av_packet_unref(packet);
                    continue;
                }
                if (ret < 0)
                {
                    av_packet_unref(packet);
                    printf("Failed to Decode packet. \n");
                    return -1;
                }
                av_packet_unref(packet);

                
                {
                    //.. do something with the frame.
                }
                av_frame_unref(pAvFrame);

            }
            
            av_packet_unref(packet);
        }
}


  


• avformat/nutenc : implement deinit()

  21 janvier 2016, par Michael Niedermayer

  avformat/nutenc : implement deinit()
  Should prevent some leaks if header writing fails
  Signed-off-by : Michael Niedermayer <michael@niedermayer.cc>
  

  • [DH] libavformat/nut.c
  • [DH] libavformat/nutenc.c

• avformat/hlsenc : Fix leak of options when initializing muxing fails

  16 décembre 2019, par Andreas Rheinhardt

  avformat/hlsenc : Fix leak of options when initializing muxing fails
  hls_mux_init() currently leaks an AVDictionary if opening a dynamic
  
  buffer fails or if avformat_init_output fails. This has been fixed by
  
  moving the initialization resp. the freeing of the dictionary around :
  
  In the former case to a place after opening the dynamic buffer, in the
  
  latter to a place before the check for initialization failure so that it
  
  is done unconditionally.
  Furthermore, the dictionary is now only copied and freed if the options
  
  in it are actually used (namely when in SEGMENT_TYPE_FMP4 mode).
  Finally, a similar situation in hls_start() has been fixed, too.
  Signed-off-by : Andreas Rheinhardt <andreas.rheinhardt@gmail.com>
  
  Reviewed-by : Steven Liu <lq@onvideo.cn>
  

  • [DH] libavformat/hlsenc.c