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Rotation Effect
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Problem
How do you create a custom Effect plug-in and create a Processor that uses the
effect? For instance, how do you create a rotation effect on a video track?
Solution
An Effect plug-in is similar to a Codec plug-in in terms of number of inputs,
number of outputs and functionality. As far as the Processor is
concerned, an Effect is treated the same way a Codec is. The main differences
are in the way they are registered and their behaviour. Unlike a Codec, an
Effect typically does not modify the format of the data. An Effect usually
modifies the data bits in some way. For instance, a mirror effect or a
mosaic effect.
The RotationEffect class works on 24-bit RGB data. It uses the rotation
matrix multiplication formula to rotate and scale the incoming video frames
in real-time. It pre-computes sine and cosine values to arrays in order to
improve performance.
To make a Processor use this effect you need to instantiate
the RotationEffect and set it on a configured Processor's video track. This
part is done by the TestEffect sample program.
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| Requirements |
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| Platform: |
JDK 1.1.6 or later |
| JMF API: |
2.0 or later |
| Implementation: |
AJ, WPP, SPP * |
* AJ = All Java, WPP = Windows Performance Pack, SPP =
Solaris Performance Pack |
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| How to run this sample |
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Download the java sources, compile them and set the CLASSPATH to point to them.
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Run TestEffect with a URL in the command line
For example,
java TestEffect file:/C:/test.mov
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| Source Code |
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