[Ffmpeg-devel] random crashes decoding MP3s

[Jacob Meuser]

On Fri, Mar 31, 2006 at 11:33:09AM -0800, Jacob Meuser wrote:
> On Fri, Mar 31, 2006 at 08:28:12PM +0100, M?ns Rullg?rd wrote:
> > Jacob Meuser <jakemsr at jakemsr.com> writes:
> > 
> > > hola,
> > >
> > > I'm seeing occasional random crashes decoding VBR MP3s to WAV, ie:
> > >
> > > $ ffmpeg file_vbr.mp3 file.wav
> > >
> > > this is from FFmpeg CVS as of about 9 hours ago on OpenBSD
> > > -current.  I also see the crashes with FFmpeg CVS from 03/21/06.
> > [...]
> > > what seems most strange is that the crashes are random.  often
> > > just running the process a second time works.  I'm decoding several
> > > MP3 files.  ffmpeg crashes about 20% of the time.  the backtrace
> > > looks very similar every time (ie, huffman_decode() is always #0).
> > 
> > This could be bad memory.  Do you have any other random crashes, like
> > GCC segfaulting or so?  Run a memory checker like memtest86, and check
> > your cabling.
> 
> hmmm.  I haven't seen anything else go wonky, but of course sh*t
> happens when you least expect it (and can least afford it :().
> 
> I'll try memtest86 and report back in a while.

I only let it go for 1.2 passes but no errors.

I realized I had always been building FFmpeg with CFLAGS+=-g, so I
tried without.  still crashed in huffman_decode(), but I got through
a lot more files before it happened.

also, the crashes do not happen with FFmpeg CVS from 04/13/2005.

-- 
<jakemsr at jakemsr.com>