WM_CAP_SEQUENCE_NOFILE message

The WM_CAP_SEQUENCE_NOFILE message initiates streaming video capture without writing data to a file. You can send this message explicitly or by using the capCaptureSequenceNoFile macro.

WM_CAP_SEQUENCE_NOFILE 
wParam = (WPARAM) 0; 
lParam = 0L; 

Return Value

Returns TRUE if successful or FALSE otherwise.

Remarks

This message is useful in conjunction with video stream or waveform-audio stream callback functions that let your application use the video and audio data directly.

If you want to alter the parameters controlling streaming capture, use the WM_CAP_SET_SEQUENCE_SETUP message prior to starting the capture.

By default, the capture window does not allow other applications to continue running during capture. To override this, either set the fYield member of the CAPTUREPARMS structure to TRUE, or install a yield callback function.

During streaming capture, the capture window can optionally issue notifications to your application of specific types of conditions. To install callback procedures for these notifications, use the following messages:

• WM_CAP_SET_CALLBACK_ERROR
• WM_CAP_SET_CALLBACK_STATUS
• WM_CAP_SET_CALLBACK_YIELD
• WM_CAP_SET_CALLBACK_VIDEOSTREAM
• WM_CAP_SET_CALLBACK_WAVESTREAM

Requirements

See also

Video Capture

Video Capture Messages