Merge commit '17e9d52c8c93f47721ff481b8867922f4b4bd663'

[ffmpeg] / doc / filters.texi

diff --git a/doc/filters.texi b/doc/filters.texi
index a5f69659485b20d6c59f57266769bf920faf570a..b736b3fe311c1d846871c9a714d5978ad7756f05 100644 (file)
--- a/doc/filters.texi
+++ b/doc/filters.texi
@@ -1439,6 +1439,42 @@ equalizer=f=1000:width_type=q:width=1:g=2,equalizer=f=100:width_type=q:width=2:g
 @end example
 @end itemize
 
+@section flanger
+Apply a flanging effect to the audio.
+
+The filter accepts the following options:
+
+@table @option
+@item delay
+Set base delay in milliseconds. Range from 0 to 30. Default value is 0.
+
+@item depth
+Set added swep delay in milliseconds. Range from 0 to 10. Default value is 2.
+
+@item regen
+Set percentage regeneneration (delayed signal feedback). Range from -95 to 95.
+Default value is 0.
+
+@item width
+Set percentage of delayed signal mixed with original. Range from 0 to 100.
+Default valu is 71.
+
+@item speed
+Set sweeps per second (Hz). Range from 0.1 to 10. Default value is 0.5.
+
+@item shape
+Set swept wave shape, can be @var{triangular} or @var{sinusoidal}.
+Default value is @var{sinusoidal}.
+
+@item phase
+Set swept wave percentage-shift for multi channel. Range from 0 to 100.
+Default value is 25.
+
+@item interp
+Set delay-line interpolation, @var{linear} or @var{quadratic}.
+Default is @var{linear}.
+@end table
+
 @section highpass
 
 Apply a high-pass filter with 3dB point frequency.
@@ -7708,7 +7744,23 @@ ffprobe -f lavfi movie=example.mov,signalstats -show_entries frame_tags=lavfi.si
 @item
 Playback video while highlighting pixels that are outside of broadcast range in red.
 @example
-ffplay example.mov -vf values="out=brng:color=red"
+ffplay example.mov -vf signalstats="out=brng:color=red"
+@end example
+
+@item
+Playback video with signalstats metadata drawn over the frame.
+@example
+ffplay example.mov -vf signalstats=stat=brng+vrep+tout,drawtext=fontfile=FreeSerif.ttf:textfile=signalstat_drawtext.txt
+@end example
+
+The contents of signalstat_drawtext.txt used in the command are:
+@example
+time %@{pts:hms@}
+Y (%@{metadata:lavfi.signalstats.YMIN@}-%@{metadata:lavfi.signalstats.YMAX@})
+U (%@{metadata:lavfi.signalstats.UMIN@}-%@{metadata:lavfi.signalstats.UMAX@})
+V (%@{metadata:lavfi.signalstats.VMIN@}-%@{metadata:lavfi.signalstats.VMAX@})
+saturation maximum: %@{metadata:lavfi.signalstats.SATMAX@}
+
 @end example
 @end itemize
 
@@ -10430,6 +10482,9 @@ Specify gamma. Lower gamma makes the spectrum more contrast, higher gamma
 makes the spectrum having more range. Acceptable value is [1.0, 7.0].
 Default value is @code{3.0}.
 
+@item fontfile
+Specify font file for use with freetype. If not specified, use embedded font.
+
 @item fullhd
 If set to 1 (the default), the video size is 1920x1080 (full HD),
 if set to 0, the video size is 960x540. Use this option to make CPU usage lower.