ffmpeg source update for sep 09

source/patched-ffmpeg-mt/doc/filters.texi

Index: source/patched-ffmpeg-mt/doc/filters.texi
===================================================================
--- source/patched-ffmpeg-mt/doc/filters.texi	(revision 59334)
+++ source/patched-ffmpeg-mt/doc/filters.texi	(working copy)
@@ -1,3 +1,19 @@
+@chapter Audio Filters
+@c man begin AUDIO FILTERS
+
+When you configure your FFmpeg build, you can disable any of the
+existing filters using --disable-filters.
+The configure output will show the audio filters included in your
+build.
+
+Below is a description of the currently available audio filters.
+
+@section anull
+
+Pass the audio source unchanged to the output.
+
+@c man end AUDIO FILTERS
+
 @chapter Video Filters
 @c man begin VIDEO FILTERS
 
@@ -39,6 +55,15 @@
 
 The default value of @var{width} and @var{height} is 0.
 
+@section fifo
+
+Buffer input images and send them when they are requested.
+
+This filter is mainly useful when auto-inserted by the libavfilter
+framework.
+
+The filter does not take parameters.
+
 @section format
 
 Convert the input video to one of the specified pixel formats.
@@ -56,6 +81,16 @@
 
 will convert the input video to the format ``yuv420p''.
 
+@section hflip
+
+Flip the input video horizontally.
+
+For example to horizontally flip the video in input with
+@file{ffmpeg}:
+@example
+ffmpeg -i in.avi -vf "hflip" out.avi
+@end example
+
 @section noformat
 
 Force libavfilter not to use any of the specified pixel formats for the
@@ -75,7 +110,7 @@
 
 @section null
 
-Pass the source unchanged to the output.
+Pass the video source unchanged to the output.
 
 @section pad