MPEG seek crash (was: [Ffmpeg-devel] Re: Compiling FFmpeg using ISO/C89 compiler)

[Steve Lhomme]

Uoti Urpala wrote:
> On Fri, 2006-12-08 at 17:28 +0100, Baptiste Coudurier wrote:
>> If my chems1.vob is the same one, and anyway it should not crash indeed.
>> I confirm that ffplay_g crash with current svn.
> 
> I tried that under MPlayer. With native demuxer there are no problems.
> With -demuxer lavf libmpeg2 shows artifacts when seeking back and -vc
> ffmpeg12 crashes. So there might be 2 bugs in ffmpeg, one in libavformat
> producing invalid output and another in libavcodec causing a crash on
> invalid input.
> 
> Decoding with libmpeg2 and ffmpeg12 also gives different aspect ratios,
> 1.78 vs 2.37. I think 1.78 looks more correct.

This sample uses Pan&Scan. It was discussed in another thread. I don't 
know how ffplay manages to display it correctly though. I had to disable 
the if( (s1->pan_scan.width == 0 )||(s1->pan_scan.height == 0) ) test in 
  mpeg_decode_postinit() to have the correct aspect ratio, and it seems 
correct with all the samples I have.

Steve