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| author | Bobby Bingham <uhmmmm@gmail.com> | 2010-04-07 01:05:24 +0000 |
|---|---|---|
| committer | Bobby Bingham <uhmmmm@gmail.com> | 2010-04-07 01:05:24 +0000 |
| commit | e0728d799151d24b58f4a824bc97014b3b2473a4 (patch) | |
| tree | 7d5820f84390b68b1a733011dbb3020d9068ee0c /doc/libavfilter.texi | |
| parent | b9bd6589d782681fe1f077058075a23636087a9a (diff) | |
Add unsharp video filter.
Contributed by Daniel G. Taylor (dan/at/programmer-art/dot/org)
Originally committed as revision 22813 to svn://svn.ffmpeg.org/ffmpeg/trunk
Diffstat (limited to 'doc/libavfilter.texi')
| -rw-r--r-- | doc/libavfilter.texi | 53 |
1 files changed, 53 insertions, 0 deletions
diff --git a/doc/libavfilter.texi b/doc/libavfilter.texi index 32bf10fd9a..3aeded9524 100644 --- a/doc/libavfilter.texi +++ b/doc/libavfilter.texi @@ -217,6 +217,59 @@ not specified it will use the default value of 16. Adding this in the beginning of filter chains should make filtering faster due to better use of the memory cache. +@section unsharp + +Sharpen or blur the input video. It accepts the following parameters: + +@multitable @columnfractions .2 .5 .1 .1 .1 +@headitem Name @tab Description @tab Min @tab Max @tab Default +@item @var{luma_msize_x} +@tab Luma matrix horizontal size +@tab 3 +@tab 13 +@tab 5 +@item @var{luma_msize_y} +@tab Luma matrix vertical size +@tab 3 +@tab 13 +@tab 5 +@item @var{luma_amount} +@tab Luma effect strength +@tab -2.0 +@tab 5.0 +@tab 1.0 +@item @var{chroma_msize_x} +@tab Chroma matrix horizontal size +@tab 3 +@tab 13 +@tab 0 +@item @var{chroma_msize_y} +@tab Chroma matrix vertical size +@tab 3 +@tab 13 +@tab 0 +@item @var{chroma_amount} +@tab Chroma effect strength +@tab -2.0 +@tab 5.0 +@tab 0.0 +@end multitable + +Negative values for the amount will blur the input video, while positive +values will sharpen. All parameters are optional and default to the +equivalent of the string '5:5:1.0:0:0:0.0'. + +@example +# Strong luma sharpen effect parameters +unsharp=7:7:2.5 + +# Strong blur of both luma and chroma parameters +unsharp=7:7:-2:7:7:-2 + +# Use the default values with @command{ffmpeg} +./ffmpeg -i in.avi -vfilters "unsharp" out.mp4 +@end example + @section vflip Flip the input video vertically. |