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

[Reimar Döffinger]

On Thu, Nov 19, 2009 at 02:29:34PM +0100, Oliver Seitz wrote:
> 
> >> 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...
> 
> Not much. The file was recorded using a demo program by a manufacturer of
> industrial cameras (www.ids-imaging.de) under Windows (linux drivers are
> to be realeased soon).
> 
> The source of the program itsself should be available, but not the source
> of the driver, which has functions implemented to write JPEGs.
> 
> If the file is just to be called buggy, for me there's no need to fix
> every issue with it, but I didn't want to miss sharing the file.

I don't think so, I suspect that the check is wrong.
I think FFmpeg currently checks if the JPEG was encoded by the Intel
JPEG library, when it should actually check if it was encoded by the
Intel VFW JPEG encoder.