Bug#801457: vlc: Segmentation fault playing a DVD with vdpau
reassign 801457 mesa-vdpau-drivers
thanks
Hello,
On Sunday 11 October 2015 02:20:59 Arthur Marsh wrote:
> When I removed the vdpau libraries for the GPU in use (r600 libraries for
> RS780 GPU), the video played alright, but did give these error messages:
>
> Failed to open VDPAU backend libvdpau_r600.so: cannot open shared object
> file: No such file or directory [mpeg2video @ 0x7fffc81b8660] ac-tex
> damaged at 1 0
> [mpeg2video @ 0x7fffc81b8660] skipped MB in I frame at 24 9
> [mpeg2video @ 0x7fffc81b8660] skipped MB in I frame at 17 18
> [mpeg2video @ 0x7fffc81b8660] ac-tex damaged at 32 25
> [mpeg2video @ 0x7fffc81b8660] ac-tex damaged at 13 32
(...)
The libavcodec software MPEG2 Video decoder is complaining that the bit stream
is corrupt.
The R600 driver is probably not robust against invalid bit stream and just
crashes instead. This is ostensibly a bug in the R600 driver (or in Mesa
VDPAU), arguably a security issue too...
As to why this occurs while playing a DVD, I don´t. Either there is some
physical problem, or the content is malformatted (some DVDs are deliberately
made to crash open-source players, though typically rather targetting
libdvdnav).
--
Rémi Denis-Courmont
http://www.remlab.net/
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