[FFmpeg-devel] [PATCH] Issue1247 - libavcodec/snow.c:2357: pred_block: Assertion `b_w>1 && b_h>1' failed.

Chris Stones chris.stones
Wed Jul 15 23:36:37 CEST 2009

On Wed, Jul 15, 2009 at 10:20 PM, Diego Biurrun <diego at biurrun.de> wrote:

> On Wed, Jul 15, 2009 at 10:03:15PM +0100, Chris Stones wrote:
> > Hi, This my first patch submit, im a bit of a stranger here so please
> > forgive if I've made a mistake.
> You sent a context diff instead of a unified diff.  Since this happens
> every once in a while I would like to know how you produced it and why.
Sorry, please find attached the unified diff.
How i produced the assertion ?
It happens frequently when encoding snow video with low resolution.
There is more info in the tracker, along with some sample media.

ffmpeg -i sample_media -vcodec snow -strict -2 -an -s 74x68 -f nut

The scaling is not part of the problem, encoding png's already this size can
auto trigger the assertion.

Chris Stones,
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