[MPlayer-users] Crash on a bit unusual MJpeg file

[Reimar Döffinger]

On Thu, Nov 19, 2009 at 01:52:58PM +0100, Oliver Seitz wrote:
> > On Thu, Nov 19, 2009 at 12:24:27PM +0100, Oliver Seitz wrote:
> >>
> >> > A gdb backtrace might help. And are those images really supposed to be
> >> > 368x80?
> >>
> >> To be complete: No, the pictures should be 368x68.
> >>
> >> My first unexperienced glance at the backtrace gets attracted to those
> >> zeroes in variables named like frame_time. This makes me think the
> >> problem
> >> could be the unusual high frame rate, no?
> >
> > The issue is a completely different one, and related to using the Intel
> > JPEG encoder which encodes the images upside-down (normally, not sure
> > about your case).
> > I had the fix ready and oked, I just forgot to apply it (done now).
> > Could you please tell me if it is correct like this or if the video
> > plays upside-down?
> > If it's not upside-down like this there's still a bug (if you try with
> > ffplay, it will play the video flipped horizontally compared to how
> > MPlayer plays it).
> 
> Great, it plays fine! Thank you.
> 
> Orientation is right, neither flipped nor mirrored. But for every frame
> there is the message
> 
> [mjpeg @ 0x87b2140]Can not flip image with CODEC_FLAG_EMU_EDGE set!
> 
> displayed.

That then means that FFmpeg incorrectly thinks the JPEG should be
flipped.
Do you have some information for us on how that file was created?
Because the other samples we have that were created by Intel JPEG
are flipped...