doc/filters: Clarify scale2ref example

Signed-off-by: Kevin Mark <kmark937@gmail.com>
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
(cherry picked from commit 114e871621)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Kevin Mark 2017-05-27 10:10:46 -04:00 committed by Michael Niedermayer
parent f71d15f04f
commit 5aaec84573

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@ -11514,7 +11514,7 @@ uses the reference video instead of the main input as basis.
@itemize
@item
Scale a subtitle stream to match the main video in size before overlaying
Scale a subtitle stream (b) to match the main video (a) in size before overlaying
@example
'scale2ref[b][a];[a][b]overlay'
@end example