[MPlayer-dev-eng] Re: [MPlayer-users] [BUG] crash with -flip

[Michael Niedermayer]

Hi

On Saturday 04 January 2003 13:09, Arpi wrote:
> Hi,
>
> > i've traced it a bit (yes i could reproduce).
> > the vf_flip.c filter does support difert rendering, if the codec has the
> > MP_IMGFLAG_ACCEPT_STRIDE flag set (ffmpeg has).
> > but, flip will set negative stride values.
> >
> > so it's probably some unhandled case / limitation of libavcodec not
> > (always) supporting negatiev strides.
> > note, that it decodes the first 2 frames (play with -fps 1) and then
> > crashes decoding the 3. frame.
>
> some update:
>
> with -nosound it "works" (==no crash) but there are some broken macroblocks
> appearing around the corners. maybe the EDGE_EMU stuff is buggy?
yes, it copies MBs into a buffer which uses the same stride -> overwrites 
whatever is before the temp buffer, its fixed now

[...]

Michael