[FFmpeg-devel] [PATCH]Mention in the documentation that fieldmatch needs cfr input

[Carl Eugen Hoyos]

Hi!

It appears to me that we all know that fieldmatch needs cfr input, 
but it isn't mentioned in the documentation.
Related to ticket #3968.

Please comment, Carl Eugen
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diff --git a/doc/filters.texi b/doc/filters.texi
index c70ddf3..bc77623 100644
--- a/doc/filters.texi
+++ b/doc/filters.texi
@@ -4447,6 +4447,9 @@ and VIVTC/VFM (VapourSynth project). The later is a light clone of TFM from
 which @code{fieldmatch} is based on. While the semantic and usage are very
 close, some behaviour and options names can differ.
 
+The filter only works for strictly constant frame rate input. If your input
+has variable frame rate, try the @ref{pullup} filter.
+
 The filter accepts the following options:
 
 @table @option