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Implement null video source.

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Originally committed as revision 21240 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Stefano Sabatini
2010-01-16 10:43:53 +00:00
parent e1bb0364f8
commit dd08b83c87
5 changed files with 104 additions and 1 deletions
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16
doc/libavfilter.texi
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@@ -197,4 +197,20 @@ Flip the input video vertically.
./ffmpeg -i in.avi -vfilters "vflip" out.avi
@end example
@chapter Available video sources
Below is a description of the currently available video sources.
@section nullsrc
Null video source, never return images. It is mainly useful as a
template and to be employed in analysis / debugging tools.
It accepts as optional parameter a string of the form
``width:height'', where ``width'' and ``height'' specify the size of
the configured source.
The default values of ``width'' and ``height'' are respectively 352
and 288 (corresponding to the CIF size format).
@bye