[FFmpeg-cvslog] doc/filters: create a dedicated examples section for lut*, and itemize
Stefano Sabatini
git at videolan.org
Fri Feb 1 18:54:44 CET 2013
ffmpeg | branch: master | Stefano Sabatini <stefasab at gmail.com> | Fri Feb 1 18:35:15 2013 +0100| [986540b65f6eb6d9fed40d7da9e58b9bbcee35ae] | committer: Stefano Sabatini
doc/filters: create a dedicated examples section for lut*, and itemize
> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=986540b65f6eb6d9fed40d7da9e58b9bbcee35ae
---
doc/filters.texi | 42 +++++++++++++++++++++++++++++++++---------
1 file changed, 33 insertions(+), 9 deletions(-)
diff --git a/doc/filters.texi b/doc/filters.texi
index 3334787..c6f0d24 100644
--- a/doc/filters.texi
+++ b/doc/filters.texi
@@ -3348,34 +3348,58 @@ expression
All expressions default to "val".
-Some examples follow:
+ at subsection Examples
+
+ at itemize
+ at item
+Negate input video:
@example
-# negate input video
lutrgb="r=maxval+minval-val:g=maxval+minval-val:b=maxval+minval-val"
lutyuv="y=maxval+minval-val:u=maxval+minval-val:v=maxval+minval-val"
+ at end example
-# the above is the same as
+The above is the same as:
+ at example
lutrgb="r=negval:g=negval:b=negval"
lutyuv="y=negval:u=negval:v=negval"
+ at end example
-# negate luminance
+ at item
+Negate luminance:
+ at example
lutyuv=y=negval
+ at end example
-# remove chroma components, turns the video into a graytone image
+ at item
+Remove chroma components, turns the video into a graytone image:
+ at example
lutyuv="u=128:v=128"
+ at end example
-# apply a luma burning effect
+ at item
+Apply a luma burning effect:
+ at example
lutyuv="y=2*val"
+ at end example
-# remove green and blue components
+ at item
+Remove green and blue components:
+ at example
lutrgb="g=0:b=0"
+ at end example
-# set a constant alpha channel value on input
+ at item
+Set a constant alpha channel value on input:
+ at example
format=rgba,lutrgb=a="maxval-minval/2"
+ at end example
-# correct luminance gamma by a 0.5 factor
+ at item
+Correct luminance gamma by a 0.5 factor:
+ at example
lutyuv=y=gammaval(0.5)
@end example
+ at end itemize
@section mp
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