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 |
Minimum supported server |
Windows Server 2003 |
Header |
Wmcodecdsp.h |
See Also
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Build date: 4/7/2010