#458: Scale filter can create output which scale filter cannot accept on its
input
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Reporter: mdsh | Owner: michael
Type: defect | Status: new
Priority: normal | Component: swscale
Version: git-master | Keywords:
Blocked By: | Blocking:
Reproduced by developer: 0 | Analyzed by developer: 0
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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.
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Ticket URL: <https://ffmpeg.org/trac/ffmpeg/ticket/458>
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