avfilter/fade: add color option.

Fixes Ticket #1822.

1 files changed, 9 insertions, 4 deletions

diff --git a/doc/filters.texi b/doc/filters.texi
index 9fae3390b1..cd52680d65 100644
--- a/doc/filters.texi
+++ b/doc/filters.texi
@@ -3809,7 +3809,8 @@ effect. Default is 0.
 @item nb_frames, n
 The number of frames for which the fade effect has to last. At the end of the
 fade-in effect the output video will have the same intensity as the input video,
-at the end of the fade-out transition the output video will be completely black.
+at the end of the fade-out transition the output video will be filled with the
+selected @option{color}.
 Default is 25.
 
 @item alpha
@@ -3824,8 +3825,12 @@ whichever comes last.  Default is 0.
 @item duration, d
 The number of seconds for which the fade effect has to last. At the end of the
 fade-in effect the output video will have the same intensity as the input video,
-at the end of the fade-out transition the output video will be completely black.
+at the end of the fade-out transition the output video will be filled with the
+selected @option{color}.
 If both duration and nb_frames are specified, duration is used. Default is 0.
+
+@item color, c
+Specify the color of the fade. Default is "black".
 @end table
 
 @subsection Examples
@@ -3856,9 +3861,9 @@ fade=in:0:25, fade=out:975:25
 @end example
 
 @item
-Make first 5 frames black, then fade in from frame 5-24:
+Make first 5 frames yellow, then fade in from frame 5-24:
 @example
-fade=in:5:20
+fade=in:5:20:color=yellow
 @end example
 
 @item