doc/filters: note format constraint for volumedetect

3 years ago · b635ac126f
parent 05ba0ffca9
commit b635ac126f
1 changed files with 3 additions and 2 deletions
--- a/doc/filters.texi
+++ b/doc/filters.texi
@ -6743,8 +6743,9 @@ volume='if(lt(t,10),1,max(1-(t-10)/5,0))':eval=frame

 Detect the volume of the input video.

-The filter has no parameters. The input is not modified. Statistics about
-the volume will be printed in the log when the input stream end is reached.
+The filter has no parameters. It supports only 16-bit signed integer samples,
+so the input will be converted when needed. Statistics about the volume will
+be printed in the log when the input stream end is reached.

 In particular it will show the mean volume (root mean square), maximum
 volume (on a per-sample basis), and the beginning of a histogram of the