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Linshizhi
ffmpeg.wasm-core
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cd39549e
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cd39549e
authored
Mar 27, 2011
by
Stefano Sabatini
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mp: add filter description to filters.texi
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doc/filters.texi
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@@ -644,6 +644,104 @@ a float number which specifies chroma temporal strength, defaults to
@var{luma_tmp}*@var{chroma_spatial}/@var{luma_spatial}
@end table
@section mp
Apply an MPlayer filter to the input video.
This filter provides a wrapper around most of the filters of
MPlayer/MEncoder.
This wrapper is considered experimental. Some of the wrapped filters
may not work properly and we may drop support for them, as they will
be implemented natively into FFmpeg. Thus you should avoid
depending on them when writing portable scripts.
The filters accepts the parameters:
@var{filter_name}[:=]@var{filter_params}
@var{filter_name} is the name of a supported MPlayer filter,
@var{filter_params} is a string containing the parameters accepted by
the named filter.
The list of the currently supported filters follows:
@table @var
@item 2xsai
@item blackframe
@item boxblur
@item cropdetect
@item decimate
@item delogo
@item denoise3d
@item detc
@item dint
@item divtc
@item down3dright
@item dsize
@item eq2
@item eq
@item field
@item fil
@item fixpts
@item framestep
@item fspp
@item geq
@item gradfun
@item harddup
@item hqdn3d
@item hue
@item il
@item ilpack
@item ivtc
@item kerndeint
@item mcdeint
@item mirror
@item noise
@item ow
@item palette
@item perspective
@item phase
@item pp7
@item pullup
@item qp
@item rectangle
@item remove_logo
@item rgbtest
@item rotate
@item sab
@item screenshot
@item smartblur
@item softpulldown
@item softskip
@item spp
@item swapuv
@item telecine
@item test
@item tile
@item tinterlace
@item unsharp
@item uspp
@item yuvcsp
@item yvu9
@end table
The parameter syntax and behavior for the listed filters are the same
of the corresponding MPlayer filters. For detailed instructions check
the "VIDEO FILTERS" section in the MPlayer manual.
Some examples follow:
@example
# remove a logo by interpolating the surrounding pixels
mp=delogo=200:200:80:20:1
# adjust gamma, brightness, contrast
mp=eq2=1.0:2:0.5
# tweak hue and saturation
mp=hue=100:-10
@end example
See also mplayer(1), @url{http://www.mplayerhq.hu/}.
@section noformat
Force libavfilter not to use any of the specified pixel formats for the
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