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Add video crop filter.

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Originally committed as revision 20342 to svn://svn.ffmpeg.org/ffmpeg/trunk
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Stefano Sabatini
2009-10-21 20:57:30 +00:00
parent 9abba21ad3
commit 190c166960
4 changed files with 266 additions and 0 deletions
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31
doc/libavfilter.texi
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@ -84,4 +84,35 @@ Below is a description of the currently available video filters.
Pass the source unchanged to the output.
@section crop
Crop the input video to x:y:width:height.
@example
./ffmpeg -i in.avi -vfilters "crop=0:0:0:240" out.avi
@end example
``x'' and ``y'' specify the position of the top-left corner of the
output (non-cropped) area.
The default value of ``x'' and ``y'' is 0.
The ``w'' and ``h'' parameters specify the width and height of the
output (non-cropped) area.
A value of 0 is interpreted as the maximum possible size contained in
the area delimited by the top-left corner at position x:y.
For example the parameters:
@example
"crop=100:100:0:0"
@end example
will delimit the rectangle with the top-left corner placed at position
100:100 and the right-bottom corner corresponding to the right-bottom
corner of the input image.
The default value of ``w'' and ``h'' is 0.
@bye