avfilter: add msad video filter

[ffmpeg] / doc / filters.texi

diff --git a/doc/filters.texi b/doc/filters.texi
index 38698b6542a5e5843eb556fd0dd178f3a978c117..eb0a0b6a0bacceaab71440ff503eddc34a84d085 100644 (file)
--- a/doc/filters.texi
+++ b/doc/filters.texi
@@ -14903,6 +14903,27 @@ Default value for @option{hi} is 64*12, default value for @option{lo} is
 64*5, and default value for @option{frac} is 0.33.
 @end table
 
+@section msad
+
+Obtain the MSAD (Mean Sum of Absolute Differences) between two input videos.
+
+This filter takes two input videos.
+
+Both input videos must have the same resolution and pixel format for
+this filter to work correctly. Also it assumes that both inputs
+have the same number of frames, which are compared one by one.
+
+The obtained per component, average, min and max MSAD is printed through
+the logging system.
+
+The filter stores the calculated MSAD of each frame in frame metadata.
+
+In the below example the input file @file{main.mpg} being processed is compared
+with the reference file @file{ref.mpg}.
+
+@example
+ffmpeg -i main.mpg -i ref.mpg -lavfi msad -f null -
+@end example
 
 @section negate