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doc/filters: add rotate example using degrees

tags/n2.2-rc1
Lou Logan Stefano Sabatini 11 years ago
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      doc/filters.texi

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@@ -6741,6 +6741,12 @@ Rotate the input by PI/6 radians counter-clockwise:
rotate=-PI/6
@end example

@item
Rotate the input by 45 degrees clockwise:
@example
rotate=45*PI/180
@end example

@item
Apply a constant rotation with period T, starting from an angle of PI/3:
@example


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