MFPKEY_BUFFERFULLNESSINFIRSTBYTE Property

Specifies whether the encoded video bit stream contains a buffer fullness value with every key frame.

Constant for IPropertyBag

g_wszWMVCBufferFullnessInFirstByte

Data Type

VT_BOOL

Remarks

You must set an output type before getting this value.

You can get the value of this property using IWMCodecProps::GetCodecProp. If you use IPropertyBag, you must first set the FOURCC value of the desired compressed format with the MFPKEY_FOURCC property.

Having the buffer fullness in the first byte of all key frames enables you to determine the buffer size required when concatenating compressed video streams.

Applies To

This read-only property is available on the encoder of the following codecs:

• Windows Media Video 9
• Windows Media Video 9 Advanced Profile

Requirements

Client: Requires Windows Vista or Windows XP.

Header: Include wmcodecdsp.h.

See Also

• Properties