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