[Libav-user] FW: av_open_input_file fails on certain Windows Machines

[Alistair Boyd]

I have an application that successfully streams video using rtp. I have
found that on certain computers the function av_open_input_file() fails with
return value -22 EINVAL (invalid argument). I have created a very simple
test app (below) which runs on some windows machines and not on others (e.g.
2 XP machines are fine, 1 XP laptop not, 1 Win7 32bit laptop fine another
not).

 

Does anyone have any insight into what the problem may be?

 

Thanks.

 

#include <stdlib.h>

#include <stdio.h>

#include <string.h>

#include <math.h>

 

////////////////////////////////////////////////////////////////////////////
//////////////////////////////////

// Required to use libs on windows

#define __STDC_CONSTANT_MACROS

#define inline _inline

////////////////////////////////////////////////////////////////////////////
//////////////////////////////////

 

 

extern "C" 

{

      #include "libavformat/avformat.h"

      #include "libavcodec/avcodec.h"

      //#include "libswscale/swscale.h"   

}

bool CreateSdpFile();

 

AVFormatContext* pFormatCtx = NULL;

 

bool CreateSdpFile()

{

      FILE *pFile = fopen ("C:\\FFMpegTest\\MP4.sdp","w");

 

      if (pFile)

      {

            fprintf (pFile, "v=0\n");

            fprintf (pFile, "o=- 0 0 IN IP4 127.0.0.1\n");

            fprintf (pFile, "s=No Name\n");

            fprintf (pFile, "c=IN IP4 192.168.123.26\n");

            fprintf (pFile, "t=0 0\n");

            fprintf (pFile, "a=tool:libavformat 52.104.0\n");

            fprintf (pFile, "m=video 5004 RTP/AVP 96\n");

            fprintf (pFile, "b=AS:1228\n");

            fprintf (pFile, "a=rtpmap:96 MP4V-ES/90000\n");

            fprintf (pFile, "a=fmtp:96 profile-level-id=1\n");

        if (fclose (pFile) != 0)

        {

             printf("dp close failed\n");

          //  AfxMessageBox("sdp close failed",MB_OK| MB_ICONSTOP);

        }

      

      }

      return true;

}

 

#undef exit

 

 

int main()

{

    CreateSdpFile();

 

    AVCodec *pCodec;    

    int numBytes;

    int avError;

 

    char* filename = "C:\\FFMpegTest\\MP4.sdp";

      //char* filename = "C:\\ABTmp\\vid.avi";

 

    av_register_all();

 

    avError = av_open_input_file(&pFormatCtx, filename, NULL, 0, NULL);

    if(avError)

    { 

        printf("Stream init error, could not open input file, %d\n",
avError);

    }       

 

}

 

 





=======
Email scanned by PC Tools - No viruses or spyware found.
(Email Guard: 7.0.0.26, Virus/Spyware Database: 6.17520)
http://free.pctools.com/
=======
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://ffmpeg.org/pipermail/libav-user/attachments/20110516/84f7eec4/attachment.html>