vf_framepack: Check and update frame_rate

(cherry picked from ffmpeg commit a46a23d30f)
Signed-off-by: Anton Khirnov <anton@khirnov.net>
This commit is contained in:
Michael Niedermayer 2015-11-03 09:57:25 -08:00 committed by Anton Khirnov
parent 65e73bc60f
commit 7d12cba95c