[Ffmpeg-devel] [BUG] MPEG 2 Division By Zero

Måns Rullgård mru
Tue Oct 31 20:41:18 CET 2006

Brian Brice <bbrice at newtek.com> writes:

> Brian Brice wrote:
>> M?ns Rullg?rd wrote:
>>> Brian Brice <bbrice at newtek.com> writes:
>>>> Hello.
>>>> Something quite strange is happening when I'm encoding MPEG 2.  I'm
>>>> encoding clips that are just noise and I get "division by 0" crashes.
>>>> Unforunately, I can't produce a call stack (using DLLs in Windows from
>>>> VC++), but I did narrow down where the division is occurring:
>>> Upload a sample and tell us an FFmpeg command line that reproduces the
>>> error.
>> Unfortunately I'm not using the command line. :-(
>> I am linking to the DLLs produced by mingw/gcc from within Visual
>> Studio.  And I know it's not a VS problem (so don't bash, please?),
>> because this stuff has worked before.  I am programmatically generating
>> frames of noise and throwing them at the encoder.  I set only certain
>> members of AVCodecContext (as mentioned in the first email), and leave
>> the rest to default.
> Sorry, I spoke too soon.  Right after I sent that message, I tried
> making an uncompressed AVI with this noise then using ffmpeg on the
> command line to reproduce.
> I uploaded a sample to /MPlayer/incoming/VictoriasNoise
> Here is a log of the execution:

Does it crash?

M?ns Rullg?rd
mru at inprovide.com

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