[FFmpeg-devel] libavfilter scale problem

Stefano Sabatini stefano.sabatini-lala
Fri Feb 26 14:31:50 CET 2010

On date Friday 2010-02-26 11:58:17 +0000, slippyr4 encoded:
> Not sure whether resurrecting this thread is correct or whether i should
> have started something new, but...
> i think the changes Vitor made to vf_transpose and vf_rotate (were there
> others too?) to prevent them from working with slices has introduced a bug
> when the affected filter is not the last filter in the chain.
> for example, this works as expected:-
> ffmpeg -t 2 -i source.m2ts -vfilters "hflip,vflip,rotate=35" output.mp4
> however, change the filter order like this:-
> ffmpeg -t 2 -i source.m2ts -vfilters "rotate=35,hflip,vflip" output.mp4
> crashes ffmpeg (on win32 with an accessviolationexception).

I believe this bug is related to how aspect ratio is managed in
libavfilter, and seems also related to the problem reported by Jarred
on ffmpeg-user.

I'll try to have a look at it soon.

FFmpeg = Fundamentalist and Funny Maxi Peaceless Entertaining Game

More information about the ffmpeg-devel mailing list