capCaptureSequenceNoFile macro (vfw.h)
The capCaptureSequenceNoFile macro initiates streaming video capture without writing data to a file. You can use this macro or explicitly send the WM_CAP_SEQUENCE_NOFILE message.
Syntax
void capCaptureSequenceNoFile(
hwnd
);
Parameters
hwnd
Handle to a capture window.
Return value
None
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 capCaptureSetSetup macro 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 macros:
- capSetCallbackOnError
- capSetCallbackOnStatus
- capSetCallbackOnVideoStream
- capSetCallbackOnWaveStream
- capSetCallbackOnYield
Requirements
| Requirement | Value |
|---|---|
| Minimum supported client | Windows 2000 Professional [desktop apps only] |
| Minimum supported server | Windows 2000 Server [desktop apps only] |
| Target Platform | Windows |
| Header | vfw.h |