lavfi/avf_showspectrum: add full frame sliding mode.

1 files changed, 13 insertions, 2 deletions

diff --git a/doc/filters.texi b/doc/filters.texi
index a3e4d81197..0ca1d6fd5b 100644
--- a/doc/filters.texi
+++ b/doc/filters.texi
@@ -10687,8 +10687,19 @@ the "Video size" section in the ffmpeg-utils manual. Default value is
 @code{640x512}.
 
 @item slide
-Specify if the spectrum should slide along the window. Default value is
-@code{0}.
+Specify how the spectrum should slide along the window.
+
+It accepts the following values:
+@table @samp
+@item replace
+the samples start again on the left when they reach the right
+@item scroll
+the samples scroll from right to left
+@item fullframe
+frames are only produced when the samples reach the right
+@end table
+
+Default value is @code{replace}.
 
 @item mode
 Specify display mode.