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WM_CAP_SET_CALLBACK_VIDEOSTREAM
The WM_CAP_SET_CALLBACK_VIDEOSTREAM message sets a callback function in the
application. AVICap calls this procedure during streaming capture when a video
buffer is filled. You can send this message explicitly or by using the capSetCallbackOnVideoStream macro.
WM_CAP_SET_CALLBACK_VIDEOSTREAM
wParam = (WPARAM) 0;
lParam = (LPARAM) (LPVOID) (fpProc);
Parameters
fpProc
Address of the video-stream callback function. Specify NULL for this parameter
to disable a previously installed video-stream callback function.
Return Values
Returns TRUE if successful or FALSE if streaming capture or a single-frame
capture session is in progress.
Remarks
The capture window calls the callback function before writing the captured
frame to disk. This allows applications to modify the frame if desired.
If a video stream callback function is used for streaming capture, the
procedure must be installed before starting the capture session and it must remain
enabled for the duration of the session. It can be disabled after streaming
capture ends.
See Also
capSetCallbackOnVideoStream
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