Signed-off-by: Fei Wang <fei.w.w...@intel.com>
---
doc/filters.texi | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/doc/filters.texi b/doc/filters.texi
index 9c4dea9abc..47ac4dc7f4 100644
--- a/doc/filters.texi
+++ b/doc/filters.texi
@@ -26117,8 +26117,8 @@ Set the height of the overlaid video on the main video.
Default value is the height of input overlay video.
@item alpha
-Set blocking detection thresholds. Allowed range is 0.0 to 1.0, it
-requires an input video with alpha channel.
+Set transparency of overlaid video. Allowed range is 0.0 to 1.0,
+higher value means lower transparency.
Default value is @code{0.0}.
@end table
--
2.25.1
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