[FFmpeg-devel] [PATCH] fix H.264 crash (issue 706)

Michael Niedermayer michaelni
Fri Apr 10 00:11:52 CEST 2009

On Thu, Apr 09, 2009 at 11:31:46PM +0200, Reimar D?ffinger wrote:
> On Thu, Apr 09, 2009 at 10:42:37PM +0200, Michael Niedermayer wrote:
> > On Thu, Apr 09, 2009 at 10:33:49PM +0200, Reimar D?ffinger wrote:
> > > Well, but that code will only run if there is either either a DC or a MV
> > > error (see above), whereas the problematic code will only run if there
> > > is no MV error. So if there is only an AC error I think the code I added
> > > above would be necessary I think...
> > 
> > short awnser
> > our h264 decoder doesnt set AC_ERROR without MV_ERROR
> But that code is not used only by H.264...
> Also, I sure don't think at all that more undocumented, obscure, not
> generally-correct and inconsistenly applied assumptions is really what
> any of the MPEG-related code needs.
> > the code is called "/* set unknown mb-type to most likely */"
> Well, _that_ one is easily fixed.
> Note that attached patch is completely untested right now.

the patch does look accpetable assuming it works and is tested and it
does fix something.

Michael     GnuPG fingerprint: 9FF2128B147EF6730BADF133611EC787040B0FAB

In a rich man's house there is no place to spit but his face.
-- Diogenes of Sinope
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