[FFmpeg-cvslog] doc/filters: extend midequalizer description

[Paul B Mahol]

ffmpeg | branch: master | Paul B Mahol <onemda at gmail.com> | Tue Feb  7 10:09:18 2017 +0100| [e87a4a85c11e348be8682acf39573fd2c5e22193] | committer: Paul B Mahol

doc/filters: extend midequalizer description

Signed-off-by: Paul B Mahol <onemda at gmail.com>

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=e87a4a85c11e348be8682acf39573fd2c5e22193
---

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

diff --git a/doc/filters.texi b/doc/filters.texi
index c988f79..89eb7ac 100644
--- a/doc/filters.texi
+++ b/doc/filters.texi
@@ -9647,6 +9647,14 @@ Search parameter. Default @code{7}.
 
 Apply Midway Image Equalization effect using two video streams.
 
+Midway Image Equalization adjusts a pair of images to have the same
+histogram, while maintaining their dynamics as much as possible. It's
+useful for e.g. matching exposures from a pair of stereo cameras.
+
+This filter has two inputs and one output, which must be of same pixel format, but
+may be of different sizes. The output of filter is first input adjusted with
+midway histogram of both inputs.
+
 This filter accepts the following option:
 
 @table @option