Bug#667504: libav-tools: bus error on sparc encoding vp8

[Julien Cristau]

On Wed, Apr  4, 2012 at 10:04:25 -0400, Jack Hill wrote:

> Package: libav-tools
> Version: 4:0.8.1-1
> Severity: normal
> 
> Dear Maintainer,
> 
> Using the avconv executable to encode a video with the vp8 codec (via libvpx) fails with a bus error. This happens with both webm and mkv containers.
> The error does not happen if a different codec is chosen (e.g. libtheora).
> 
> To reproduce:
> 0) get a video encoded in something other than vp8 (I used youtube-dl to get an h.264 encoded video).
> 1) try to transcode it with
> avconv -i infile.mp4 outfile.webm
> (avconv automatically chooses libvpx for a .webm file)
> 2) observe failure.
> 
> I will appily provide more debuggin information if provided with instructions for obtaining.
> 
Get debug symbols for avconv and the relevant libraries (at least libav*
and libvpx).  There'll either be a -dbg package in the archive, or you
can rebuild from source with DEB_BUILD_OPTIONS=nostrip set in the build
environment.  Then run avconv in gdb, and get a full backtrace when it
crashes.

See also http://wiki.debian.org/HowToGetABacktrace

Cheers,
Julien
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