Buffering Stream Filter (Compact 7)

3/12/2014

The Buffering Stream Filter accepts unbuffered streaming data from a source filter, such as the HTTP Source Filter.

The following table shows the filter properties.

Filter property	Description
Filter Interfaces	IBaseFilter Interface IBuffering Interface
Input Pin Media Types	MEDIATYPE_Stream_Unbuffered
Input Pin Media Subtypes	A FourCC GUID matching the file extension. For more information, see FourCC Codes.
Input Pin Interfaces	IPin Interface
Output Pin Media Types	MEDIATYPE_Stream_Buffered
Output Pin Media Subtypes	A FourCC GUID matching the file extension. For more information, see FourCC Codes.
Output Pin Interfaces	IPin Interface IAsyncReader2 Interface
Filter CLSID	CLSID_BufferingStreamFilter
Executable	Quartz.dll
SYSGEN Variable	SYSGEN_DSHOW
Merit	MERIT_PREFERRED

Remarks

The demultiplexer must control the buffering depth to ensure that enough data is buffered for smooth playback. The default amount of data buffered is 1 MB. The buffer can be set to any amount by using the IBuffering Interface of the filter. The amount of data that can be held by a buffer using the 1 MB default size is shown in the table below.

Data bit rate	Storage Capacity
320 kbps	25 seconds
256 kbps	40 seconds
192 kbps	42 seconds
128 kbps	64 seconds

See Also

Reference

Supported DirectShow Filters
HTTP Source Filter