avutil/mathematics: fix 2 typos in the doxy

[ffmpeg] / doc / codecs.texi

diff --git a/doc/codecs.texi b/doc/codecs.texi
index 1606f6c5c94d14c9a0b33aa1ac7c50b455a197dc..c2cd555284c204e47bfe9f0487626fcd214ac49c 100644 (file)
--- a/doc/codecs.texi
+++ b/doc/codecs.texi
@@ -877,6 +877,9 @@ Set frame skip factor.
 
 @item skip_exp @var{integer} (@emph{encoding,video})
 Set frame skip exponent.
+Negative values behave identical to the corresponding positive ones, except
+that the score is normalized.
+Positive values exist primarly for compatibility reasons and are not so useful.
 
 @item skipcmp @var{integer} (@emph{encoding,video})
 Set frame skip compare function.