ICameraControl::put_RollRelative 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 It has been superseded by MediaPlayer, IMFMediaEngine, and Audio/Video Capture in Media Foundation.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 put_RollRelative method sets the camera's relative roll. The relative roll is expressed as a number of steps, where the size of each step depends on the camera model.

Syntax

HRESULT put_RollRelative(
  [in] long Value,
  [in] long Flags
);

Parameters

[in] Value

Specifies the relative roll. The size of the value represents the desired rotation speed; a higher value represents a higher speed. To get the range of possible values, call ICameraControl::getRange_RollRelative.

[in] Flags

Zero or more flags. See CameraControlFlags. If the CameraControl_Flags_Auto flag is used, the Value parameter is ignored and the camera sets the default value.

Return value

Returns an HRESULT value.

Requirements

See also

Error and Success Codes

ICameraControl Interface