avfilter: add corr video filter

1 files changed, 24 insertions, 0 deletions

diff --git a/doc/filters.texi b/doc/filters.texi
index f45b579a69..1cb7fd94a7 100644
--- a/doc/filters.texi
+++ b/doc/filters.texi
@@ -10110,6 +10110,30 @@ ffmpeg -f lavfi -i nullsrc=s=100x100,coreimage=filter=CIQRCodeGenerator@@inputMe
 @end example
 @end itemize
 
+@section corr
+
+Obtain the correlation 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 correlation is printed through
+the logging system.
+
+The filter stores the calculated correlation of each frame in frame metadata.
+
+This filter also supports the @ref{framesync} options.
+
+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 corr -f null -
+@end example
+
 @section cover_rect
 
 Cover a rectangular object