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MFPKEY_RMAX Property

Specifies the peak bit rate, in bits per second, used for constrained 2-pass variable-bit-rate (VBR) playback.

Constant for IPropertyBag

g_wszWMVCMaxBitrate

Data Type

VT_I4

Default Value

No default.

Remarks

This value represents the peak bit rate for playback. The value of MFPKEY_BMAX is used to describe the buffer in terms of this bit rate; in effect, constrained VBR is similar to constant bit rate (CBR) using this value as the bit rate. However, a constrained VBR stream can be played back at a lower bit rate, as long as the buffer is increased.

You must set this value for peak-constrained two-pass VBR encoding. After you begin processing samples, you must not query for this value until you are finished encoding the stream. The encoder interprets a request for this value as a signal that the encoding session is over; the next sample that you process is treated as the beginning of a new session.

Typically, this value is two to three times greater than the value of MFPKEY_RAVG.

Requirements

Minimum supported client

Windows XP [desktop apps only]

Minimum supported server

Windows Server 2003 [desktop apps only]

Header

Wmcodecdsp.h

See also

Media Foundation Properties

 

 

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