GetCodecProperties
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pProperties [out,retval]
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Pointer to the SAFEARRAY (integer) containing the values of the codec properties. The values are written in the array as follows:
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Properties [0] Quality. Numerical value of the quality parameter used by the codec, if supported.
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Properties [1] DataRate. Data rate in kb/sec used by the codec, if supported.
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Properties [2] KeyFrameRate. Amount of frames after which a key frame is recorded, if supported.
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Properties [3] PFramesPerKey. Rate of predicted (P) frames per key frame, if supported.
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Properties [4] WindowSize. Amount of frames over which the compressor maintains the average data rate.
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S_OK
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Success
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E_FAIL
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Failure to retrieve the codec's properties
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