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doc/filters: fix syntax and description for the lut* options

This commit is contained in:
Stefano Sabatini 2013-02-01 18:32:21 +01:00
parent b868275ddb
commit 902fa77fd7
1 changed files with 24 additions and 12 deletions
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36
doc/filters.texi
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@ -3272,10 +3272,14 @@ corresponding pixel component values.
The @var{lut} filter requires either YUV or RGB pixel formats in
input, and accepts the options:
@table @option
@item @var{c0} (first pixel component)
@item @var{c1} (second pixel component)
@item @var{c2} (third pixel component)
@item @var{c3} (fourth pixel component, corresponds to the alpha component)
@item c0
set first pixel component expression
@item c1
set second pixel component expression
@item c2
set third pixel component expression
@item c3
set fourth pixel component expression, corresponds to the alpha component
@end table
The exact component associated to each option depends on the format in
@ -3284,19 +3288,27 @@ input.
The @var{lutrgb} filter requires RGB pixel formats in input, and
accepts the options:
@table @option
@item @var{r} (red component)
@item @var{g} (green component)
@item @var{b} (blue component)
@item @var{a} (alpha component)
@item r
set red component expression
@item g
set green component expression
@item b
set blue component expression
@item a
alpha component expression
@end table
The @var{lutyuv} filter requires YUV pixel formats in input, and
accepts the options:
@table @option
@item @var{y} (Y/luminance component)
@item @var{u} (U/Cb component)
@item @var{v} (V/Cr component)
@item @var{a} (alpha component)
@item y
set Y/luminance component expression
@item u
set U/Cb component expression
@item v
set V/Cr component expression
@item a
set alpha component expression
@end table
The expressions can contain the following constants and functions: