[FFmpeg-cvslog] doc/filters: Clarify scale2ref example

[Kevin Mark]

ffmpeg | branch: release/3.1 | Kevin Mark <kmark937 at gmail.com> | Sat May 27 10:10:46 2017 -0400| [5aaec845738ba401a97eae4fb16955610f30b1d8] | committer: Michael Niedermayer

doc/filters: Clarify scale2ref example

Signed-off-by: Kevin Mark <kmark937 at gmail.com>
Signed-off-by: Michael Niedermayer <michael at niedermayer.cc>
(cherry picked from commit 114e8716214d414d7965029ae5fe74668ed69e4a)
Signed-off-by: Michael Niedermayer <michael at niedermayer.cc>

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=5aaec845738ba401a97eae4fb16955610f30b1d8
---

 doc/filters.texi | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/doc/filters.texi b/doc/filters.texi
index b482236e10..92f541de93 100644
--- a/doc/filters.texi
+++ b/doc/filters.texi
@@ -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