[Ffmpeg-devel] weird snow segfaults on amd64

[Michael Niedermayer]

Hi

On Sunday 17 April 2005 04:39, Corey Hickey wrote:
> Hello,
>
> Mencoder is segfaulting most of the times I try to use snow. The odd
> part is that it's not 100% reproducible. Actually, it's 0% reproducible.
> Every time I run mencoder the output is different; most of the time it
> segfaults on the first few frames, and about 5% of the time it gets to
> around the 85th frame before segfaulting anyway.
>
> I built an i386 mencoder and ran it under my i386 chroot, and that used
> snow without any problems, so I'm pretty sure the problem isn't my
> machine being a whole lot more flaky than I thought. :)
>
> The command I'm using is:
> mencoder snow-segfault.vob -nosound -ofps 24000/1001 -ovc lavc \
> -lavcopts vcodec=snow:vstrict=-1
>
> The source file doesn't seem to matter (it even happens with
> /dev/urandom). I've uploaded a 1MB clip to:
> ftp://ftp.mplayerhq.hu/MPlayer/incoming/snow-amd64/
> --and--
> http://fatooh.org/files/mpbug/snow-amd64/
>
> There's also a sample 'mencoder -v' log, a gdb log, and the text of this
> email (the two logs are attached, too).
>
> ======================================================================
> Here's the system I'm using:
>
> MEncoder dev-CVS-050416-15:14-3.4.4 (C) 2000-2005 MPlayer Team
>
> Debian-amd64 "Pure64 Sid"
>
> Linux bugfood 2.6.11.6 #1 Fri Apr 1 12:04:37 PST 2005 x86_64 GNU/Linux
>
> libc6 version 2.3.2
>
> gcc version 3.4.4 20050314 (prerelease) (Debian 3.4.3-12)
>
> GNU ld version 2.15
>
> GNU assembler 2.15
>
> =======================================================================
>
> Please tell me if there's anything more I can do; I'd be happy to assist.

there are no line numbers in the gdb output ...

[...]
-- 
Michael

"nothing is evil in the beginning. Even Sauron was not so." -- Elrond