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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 It has been superseded by MediaPlayer, IMFMediaEngine, and Audio/Video Capture in Media Foundation.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

See also

Error and Success Codes

ICameraControl Interface