@section crop
-Crop the input video to x:y:width:height.
+Crop the input video to @var{x}:@var{y}:@var{width}:@var{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
+@var{x} and @var{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 default value of @var{x} and @var{y} is 0.
-The ``width'' and ``height'' parameters specify the width and height
+The @var{width} and @var{height} 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
100:100 and the right-bottom corner corresponding to the right-bottom
corner of the input image.
-The default value of ``width'' and ``height'' is 0.
+The default value of @var{width} and @var{height} is 0.
@section format
@section scale
-Scale the input video to width:height and/or convert the image format.
+Scale the input video to @var{width}:@var{height} and/or convert the image format.
For example the command:
the next filter, the scale filter will convert the input to the
requested format.
-If the value for ``width'' or ``height'' is 0, the respective input
+If the value for @var{width} or @var{height} is 0, the respective input
size is used for the output.
-If the value for ``width'' or ``height'' is -1, the scale filter will
+If the value for @var{width} or @var{height} is -1, the scale filter will
use, for the respective output size, a value that maintains the aspect
ratio of the input image.
-The default value of ``width'' and ``height'' is 0.
+The default value of @var{width} and @var{height} is 0.
@section slicify
template and to be employed in analysis / debugging tools.
It accepts as optional parameter a string of the form
-``width:height'', where ``width'' and ``height'' specify the size of
+@var{width}:@var{height}, where @var{width} and @var{height} specify the size of
the configured source.
-The default values of ``width'' and ``height'' are respectively 352
+The default values of @var{width} and @var{height} are respectively 352
and 288 (corresponding to the CIF size format).
@chapter Available video sinks