ffmpeg source update for sep 09

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

+@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
 
 When you configure your FFmpeg build, you can disable any of the
 existing filters using --disable-filters.
 The configure output will show the video filters included in your
 build.
 
 Below is a description of the currently available video filters.
 
@@ skipping 21 matching lines @@
 @example
 "crop=100:100:0:0"
 @end example
 
 will delimit the rectangle with the top-left corner placed at position
 100:100 and the right-bottom corner corresponding to the right-bottom
 corner of the input image.
 
 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.
 Libavfilter will try to pick one that is supported for the input to
 the next filter.
 
 The filter accepts a list of pixel format names, separated by ``:'',
 for example ``yuv420p:monow:rgb24''.
 
 The following command:
 
 @example
 ./ffmpeg -i in.avi -vf "format=yuv420p" out.avi
 @end example
 
 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
 input to the next filter.
 
 The filter accepts a list of pixel format names, separated by ``:'',
 for example ``yuv420p:monow:rgb24''.
 
 The following command:
 
 @example
 ./ffmpeg -i in.avi -vf "noformat=yuv420p, vflip" out.avi
 @end example
 
 will make libavfilter use a format different from ``yuv420p'' for the
 input to the vflip filter.
 
 @section null
 
-Pass the source unchanged to the output.
+Pass the video source unchanged to the output.
 
 @section pad
 
 Add paddings to the input image, and places the original input at the
 given coordinates @var{x}, @var{y}.
 
 It accepts the following parameters:
 @var{width}:@var{height}:@var{x}:@var{y}:@var{color}.
 
 Follows the description of the accepted parameters.
@@ skipping 239 matching lines @@
 Below is a description of the currently available video sinks.
 
 @section nullsink
 
 Null video sink, do absolutely nothing with the input video. It is
 mainly useful as a template and to be employed in analysis / debugging
 tools.
 
 @c man end VIDEO SINKS