[FFmpeg-devel] [PATCH] vf_overlay handles expression evaluation of frame size change in frame-by-frame evalutaion mode

Bodecs Bela bodecsb at vivanet.hu
Tue Jan 19 20:42:06 CET 2016

Hi All,

vf_overlay video filter accepts expressions in its parameters. In
'frame-by-frame' evaluation mode it recalculates them regularly, but
incoming video frame size changes did not reflect in their values. So if 
you used
width or height of any source videos in expressions as parameters,
they stayed on their initial values. This patch corrects this bug.

Please consider to put this patch into the official ffmpeg source tree.

thank you,

Bela Bodecs

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