[Ffmpeg-devel] Can I load a image file like this?

[Shiqi Yu]

I want to load image files, but i have suffered the following errors for
many days :(
I use ffmpeg 0.4.9 pre 1

###############source code######################################
static int read_data_alloc_cb(void *opaque, AVImageInfo *info)
{

  return 0;//do noting, just return 0;

}
int main(int argc, char * argv[])
{
  ByteIOContext bi, *f=&bi;
  AVImageInfo ImgInfo, * pinfo=&ImgInfo;

  if (url_fopen(f, argv[1], URL_RDONLY) < 0) 
    {
      fprintf(stderr, "open file %s error.\n", argv[1]);
      return -1;
    }
  av_read_image(f, argv[1], NULL , read_data_alloc_cb, pinfo);

}
##############source code end####################################

when i run to av_read_image(f,...) function with argv[1]=image.png,
gdb show me the following error.


###############debug result######################################
(gdb) s

Program received signal SIGSEGV, Segmentation fault.
0x40072c90 in asf_init () from /usr/local/lib/libavformat.so
(gdb) s
Single stepping until exit from function asf_init, 
which has no line number information.

Program terminated with signal SIGSEGV, Segmentation fault.
The program no longer exists.
(gdb) s
The program is not being run.

-- 
???
Shiqi Yu
_______________________________________________________________

National Laboratory of Pattern Recognition,
Institute of Automation, Chinese Academy of Sciences,
Beijing, P.R.China, 100080
Tel: +86-10-62653768 Fax: +86-10-62551993
Web: http://www.ia.ac.cn/personal/shiqi.yu
_______________________________________________________________
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