Merge commit 'dd249245'

* commit 'dd249245':
  filter docs: reference scale and fps filters

Conflicts:
	doc/filters.texi
Merged-by: Michael Niedermayer <michaelni@gmx.at>

doc/filters.texi

@@ -198,7 +198,7 @@ In a complete filterchain all the unlabelled filter input and output
 pads must be connected. A filtergraph is considered valid if all the
 filter input and output pads of all the filterchains are connected.
 
-Libavfilter will automatically insert scale filters where format
+Libavfilter will automatically insert @ref{scale} filters where format
 conversion is required. It is possible to specify swscale flags
 for those automatically inserted scalers by prepending
 @code{sws_flags=@var{flags};}
@@ -4314,6 +4314,7 @@ format=pix_fmts=yuv420p|yuv444p|yuv410p
 @end example
 @end itemize
 
+@anchor{fps}
 @section fps
 
 Convert the video to specified constant frame rate by duplicating or dropping
@@ -6671,6 +6672,7 @@ must be a value in the 0.1-100.0 range.
 Each chroma option value, if not explicitly specified, is set to the
 corresponding luma option value.
 
+@anchor{scale}
 @section scale
 
 Scale (resize) the input video, using the libswscale library.