[FFmpeg-cvslog] doc/filters: correct description of variables in blend filter

[Gyan Doshi]

ffmpeg | branch: master | Gyan Doshi <ffmpeg at gyani.pro> | Fri Jul 13 11:09:49 2018 +0530| [97d766ff52fb0cb79b82c0b9e0a5bdca3dbdb78f] | committer: Gyan Doshi

doc/filters: correct description of variables in blend filter

Invert description of SW / SH variables.

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=97d766ff52fb0cb79b82c0b9e0a5bdca3dbdb78f
---

 doc/filters.texi | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/doc/filters.texi b/doc/filters.texi
index d236bd69b7..49895ff947 100644
--- a/doc/filters.texi
+++ b/doc/filters.texi
@@ -5645,10 +5645,10 @@ the width and height of currently filtered plane
 
 @item SW
 @item SH
-Width and height scale depending on the currently filtered plane. It is the
-ratio between the corresponding luma plane number of pixels and the current
-plane ones. E.g. for YUV4:2:0 the values are @code{1,1} for the luma plane, and
- at code{0.5,0.5} for chroma planes.
+Width and height scale for the plane being filtered. It is the
+ratio between the dimensions of the current plane to the luma plane,
+e.g. for a @code{yuv420p} frame, the values are @code{1,1} for
+the luma plane and @code{0.5,0.5} for the chroma planes.
 
 @item T
 Time of the current frame, expressed in seconds.