[FFmpeg-devel] Crash in hpel_motion

Ian McIntosh ianm
Tue Apr 13 09:32:44 CEST 2010

> A negative offset at that point is not necessarily a bug. This is
> because depending on some magic flag decoders can use a padding area
> around the reference frames in order to handle out-of-frame motion
> vectors. So while src does point at least at the top-left corner of
> the frame, there can still be lower address values
> which are valid to access.

Okay, thanks. As pointed out already, the patch is wrong. I will look 
further into this then.

> It would be most helpful if you can provide the sample file that
> causes the crash and follow the instructions here:
> http://ffmpeg.org/bugreports.html

I have seen that, but would like to attempt locating the problem myself 
first. If I do not succeed then I will submit a report.


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