doc/filters: note requirements for xfade inputs

4 years ago · 54d8386f52
parent 7368e5537d
commit 54d8386f52
1 changed files with 3 additions and 0 deletions
--- a/doc/filters.texi
+++ b/doc/filters.texi
@ -21803,6 +21803,9 @@ Default is @code{3}.
 Apply cross fade from one input video stream to another input video stream.
 The cross fade is applied for specified duration.

+Both inputs must be constant frame-rate and have the same resolution, pixel format,
+frame rate and timebase.
+
 The filter accepts the following options:

@table @option