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doc/libavfilter.texi
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@section crop
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Crop the input video to x:y:width:height.
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Crop the input video to @var{x}:@var{y}:@var{width}:@var{height}.
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@example
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./ffmpeg -i in.avi -vfilters "crop=0:0:0:240" out.avi
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@end example
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``x'' and ``y'' specify the position of the top-left corner of the
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@var{x} and @var{y} specify the position of the top-left corner of the
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output (non-cropped) area.
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The default value of ``x'' and ``y'' is 0.
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The default value of @var{x} and @var{y} is 0.
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The ``width'' and ``height'' parameters specify the width and height
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The @var{width} and @var{height} parameters specify the width and height
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of the output (non-cropped) area.
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A value of 0 is interpreted as the maximum possible size contained in
......
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100:100 and the right-bottom corner corresponding to the right-bottom
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corner of the input image.
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The default value of ``width'' and ``height'' is 0.
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The default value of @var{width} and @var{height} is 0.
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@section format
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......
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@section scale
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Scale the input video to width:height and/or convert the image format.
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Scale the input video to @var{width}:@var{height} and/or convert the image format.
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For example the command:
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......
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the next filter, the scale filter will convert the input to the
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requested format.
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If the value for ``width'' or ``height'' is 0, the respective input
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If the value for @var{width} or @var{height} is 0, the respective input
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size is used for the output.
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If the value for ``width'' or ``height'' is -1, the scale filter will
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If the value for @var{width} or @var{height} is -1, the scale filter will
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use, for the respective output size, a value that maintains the aspect
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ratio of the input image.
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The default value of ``width'' and ``height'' is 0.
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The default value of @var{width} and @var{height} is 0.
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@section slicify
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......
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template and to be employed in analysis / debugging tools.
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It accepts as optional parameter a string of the form
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``width:height'', where ``width'' and ``height'' specify the size of
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@var{width}:@var{height}, where @var{width} and @var{height} specify the size of
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the configured source.
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The default values of ``width'' and ``height'' are respectively 352
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The default values of @var{width} and @var{height} are respectively 352
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and 288 (corresponding to the CIF size format).
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@chapter Available video sinks

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