ICameraControl::get_Roll method (vidcap.h)
[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 It has been superseded by MediaPlayer, IMFMediaEngine, and Audio/Video Capture in Media Foundation.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 get_Roll method returns the camera's roll angle.
Syntax
HRESULT get_Roll(
[out] long *pValue,
[out] long *pFlags
);
Parameters
[out] pValue
Receives the roll angle, in degrees. Positive values are clockwise along the image viewing axis, and negative values are counter clockwise. Theoretical values range from –180 degrees to +180 degrees, but the actual range depends on the camera. See ICameraControl::getRange_Roll.
[out] pFlags
Receives one or more flags. See CameraControlFlags.
Return value
Returns an HRESULT value.
Requirements
| Requirement | Value |
|---|---|
| Minimum supported client | Windows XP with SP2 [desktop apps only] |
| Minimum supported server | Windows Server 2003 [desktop apps only] |
| Target Platform | Windows |
| Header | vidcap.h |
| Library | Strmiids.lib |