id	summary	reporter	owner	description	type	status	priority	component	version	resolution	keywords	cc	blockedby	blocking	reproduced	analyzed
458	Scale filter can create output which scale filter cannot accept on its input	mdsh	michael	"I know this is a bit of a bizarre filter chain, It's constructed to 
demonstrate the point I'm hoping to make, without using any of my code.

Clock10.mov is just a PAL DV, but I think any _interlaced_ file will do.

./ffmpeg -loglevel debug -i ~/Movies/Clock10.mov -vf 
""slicify=32,scale=0:0:interl=1,format=yuv420p,scale=0:0:interl=1,format=yuv422p,scale=0:0:interl=1,format=yuv420p"" 
-pix_fmt yuv420p -vframes 1 -an -f rawvideo -y /dev/null

Essentially, the 'y' parameter in the slices of the output of the second 
scale is not aligned by 4 (the first slice is, in fact, 26 lines high, 
so the second slice starts at 26) so it is not valid for the input of 
the third scale.

I don't think the output of this filter chain should throw an assert."	defect	closed	important	undetermined	git-master	fixed	crash abort				1	0