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doc: Explain how to use the fps and the fieldmatch filter together.

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Fixes ticket #3968.
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Carl Eugen Hoyos 2015-09-03 14:36:34 +02:00
parent fddcd9e570
commit 3cf0c959cd
1 changed files with 3 additions and 2 deletions
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doc/filters.texi
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@ -5483,8 +5483,9 @@ which @code{fieldmatch} is based on. While the semantic and usage are very
close, some behaviour and options names can differ.
The @ref{decimate} filter currently only works for constant frame rate input.
Do not use @code{fieldmatch} and @ref{decimate} if your input has mixed
telecined and progressive content with changing framerate.
If your input has mixed telecined (30fps) and progressive content with a lower
framerate like 24fps use the following filterchain to produce the necessary cfr
stream: @code{dejudder,fps=30000/1001,fieldmatch,decimate}.
The filter accepts the following options: