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IAMVideoCompression::get_WindowSize

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Microsoft DirectShow 9.0

IAMVideoCompression::get_WindowSize

The get_WindowSize method retrieves the number of frames over which the compressor will maintain the average data rate.

For example, assuming a data rate of 100K/sec and a frame rate of 10 frames per second, if the window size is 1, then every frame will be 10K or less. If the window size is 5, then every five consecutive frames will average 10K per frame, but individual frames may exceed this size.

The default window size is 1.

Syntax

  HRESULT get_WindowSize(
  DWORDLONG *pWindowSize
);

Parameters

pWindowSize

[out] Pointer to a variable that receives the window size, expressed as a number of frames.

Return Values

Returns an HRESULT value. Possible values include the following.

Return code Description
S_OK Success.
E_NOTIMPL Not implemented.
E_POINTER NULL pointer argument.

Requirements

Header: Declared in Strmif.h; include Dshow.h.

Library: Use Strmiids.lib.

See Also