[issue2396] FFmpeg Memory Leak on Windows Platform (Windows 7)

[Meskalin]

Meskalin <fa...@false.com> added the comment:

Hi, Guys...
I just modify the sample code on windows to show the 
exact problem with av_read_frame...**I free all 
packets*** but windows memory usage still increases 
when i look at the application ....

There is a real problem at windows with memory 
usage...

----------
status: closed -> open
substatus: invalid -> reproduced

________________________________________________
FFmpeg issue tracker <iss...@roundup.ffmpeg.org>
<https://roundup.ffmpeg.org/issue2396>
________________________________________________
extern "C" 
{
#define __STDC_CONSTANT_MACROS
#define __STDC_LIMIT_MACROS

#include "libavformat/avformat.h"
#include "libavcodec/avcodec.h"
#include "libavutil/avutil.h"
#include "libswscale/swscale.h"

}



int main(int argc, char *argv[]) {

        AVFormatContext *pFormatCtx;
        int             i, videoStream;
        AVCodecContext  *pCodecCtx;
        AVCodec         *pCodec;
        AVPacket        packet;

        
    
        char* fileName = "YourFile";  // Enter valid file

        // Register all formats and codecs
        av_register_all();

        // Open video file
        if(av_open_input_file(&pFormatCtx, fileName, 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, fileName, 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

                // 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

  
        
        int packetNumber=1;
        printf("\n See the memory usage");

        while(av_read_frame(pFormatCtx, &packet)>=0) 
        {
                        
                    printf("\n Got Packet :%d",packetNumber); 

                        
//*************************************************************
                        // Free the packet that was allocated by av_read_frame
                        av_free_packet(&packet);
                        
//**************************************************************
                        packetNumber++;

        }



        // Close the codec
        avcodec_close(pCodecCtx);

        // Close the video file
        av_close_input_file(pFormatCtx);

        return 0;
}