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diff --git a/doc/libavfilter.texi b/doc/libavfilter.texi index 0e473fdfee..28f24bce9f 100644 --- a/doc/libavfilter.texi +++ b/doc/libavfilter.texi @@ -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 |