[MPlayer-dev-eng] gcc 2.95 compiler bug

[Diego Biurrun]

D Richard Felker III writes:
> On Sat, Nov 13, 2004 at 01:10:58PM +0100, Diego Biurrun wrote:
> > 
> > Looks like our beloved icon of free software compiler technology is
> > getting blemishes ;-)
> > 
> > I'm 99% positive I identified a compiler bug in gcc 2.95.3/4 related
> > to H.261 support.  When I play one of the samples from
> > 
> > http://mplayerhq.hu/MPlayer/samples/h261-raw/
> > 
> > I get something like the following output (qcifhall28.p64):
> > 
> > Starting playback...
> > [h261 @ 0x85ca79c]Bad picture start code
> > [h261 @ 0x85ca79c]header damaged
> > Error while decoding frame!
> > [h261 @ 0x85ca79c]warning: first frame is no keyframe
> > [ffmpeg] aspect_ratio: 0.000000
> > VDec: vo config request - 176 x 144 (preferred csp: Planar YV12)
> > Trying filter chain: vo
> > VDec: using Planar YV12 as output csp (no 0)
> > Movie-Aspect is nan:1 - prescaling to correct movie aspect.
>                   ^^^^^
> 
> no, it's not a compiler bug. it's just that uninitialized data happens
> to have different shit in it depending on the compiler version. fix
> the demuxer to set aspect rather than leaving it uninitialized...

Too late, Michael already fixed it in libavformat :-)

Diego