EC_BUFFERING_DATA

[The feature associated with this page, DirectShow, is a legacy feature. It has been superseded by MediaPlayer, IMFMediaEngine, and Audio/Video Capture in Media Foundation. Those features have been optimized for Windows 10 and Windows 11. Microsoft strongly recommends that new code use MediaPlayer, IMFMediaEngine and Audio/Video Capture in Media Foundation instead of DirectShow, when possible. Microsoft suggests that existing code that uses the legacy APIs be rewritten to use the new APIs if possible.]

The graph is buffering data, or has stopped buffering data.

Parameters

lParam1

(BOOL) TRUE if the graph is starting to buffer, or FALSE if the graph has stopped buffering.

lParam2

Zero.

Default Action

None.

Remarks

A filter can send this event if it needs to buffer data from an external source. (For example, it might be loading data from a network.) The application can use this event to adjust its user interface.

Requirements

Requirement Value
Header
Dshow.h

See also

Event Notification Codes

Event Notification in DirectShow