lavfi/hue: allow changing brightness

[ffmpeg] / doc / filters.texi

diff --git a/doc/filters.texi b/doc/filters.texi
index 0dc928889d843e95eab09d55685b8e84cf4256cf..5d9a2df2643cbd2d1a43495cf2a776edc0559415 100644 (file)
--- a/doc/filters.texi
+++ b/doc/filters.texi
@@ -4159,6 +4159,14 @@ round to nearest
 @end table
 The default is @code{near}.
 
+@item start_time
+Assume the first PTS should be the given value, in seconds. This allows for
+padding/trimming at the start of stream. By default, no assumption is made
+about the first frame's expected PTS, so no padding or trimming is done.
+For example, this could be set to 0 to pad the beginning with duplicates of
+the first frame if a video stream starts after the audio stream or to trim any
+frames with a negative PTS.
+
 @end table
 
 Alternatively, the options can be specified as a flat string:
@@ -4707,12 +4715,16 @@ defaults to "1".
 @item H
 Specify the hue angle as a number of radians. It accepts an
 expression, and defaults to "0".
+
+@item b
+Specify the brightness in the [-10,10] range. It accepts an expression and
+defaults to "0".
 @end table
 
 @option{h} and @option{H} are mutually exclusive, and can't be
 specified at the same time.
 
-The @option{h}, @option{H} and @option{s} option values are
+The @option{b}, @option{h}, @option{H} and @option{s} option values are
 expressions containing the following constants:
 
 @table @option
@@ -4782,10 +4794,11 @@ hue="s=max(0\, min(1\, (START+DURATION-t)/DURATION))"
 
 This filter supports the following commands:
 @table @option
+@item b
 @item s
 @item h
 @item H
-Modify the hue and/or the saturation of the input video.
+Modify the hue and/or the saturation and/or brightness of the input video.
 The command accepts the same syntax of the corresponding option.
 
 If the specified expression is not valid, it is kept at its current