doc/filters.texi: add another lut2 example

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

diff --git a/doc/filters.texi b/doc/filters.texi
index 2324b96867c23b32ef15986477a7c252d6db2112..40891358074785c3071071354acc2a1c1f09a018 100644 (file)
--- a/doc/filters.texi
+++ b/doc/filters.texi
@@ -10004,6 +10004,12 @@ Highlight differences between two YUV video streams:
 @example
 lut2='ifnot(x-y,0,pow(2,bdx)-1):ifnot(x-y,pow(2,bdx-1),pow(2,bdx)-1):ifnot(x-y,pow(2,bdx-1),pow(2,bdx)-1)'
 @end example
+
+@item
+Show max difference between two video streams:
+@example
+lut2='if(lt(x,y),0,if(gt(x,y),pow(2,bdx)-1,pow(2,bdx-1))):if(lt(x,y),0,if(gt(x,y),pow(2,bdx)-1,pow(2,bdx-1))):if(lt(x,y),0,if(gt(x,y),pow(2,bdx)-1,pow(2,bdx-1)))'
+@end example
 @end itemize
 
 @section maskedclamp