QCameraControl ¶

详细描述 ¶

此服务被提供由 QMediaService 对象凭借 QMediaService::control()。它被用于 QCamera .

The interface name of QCameraControl is org.qt-project.qt.cameracontrol/5.0 作为定义在 QCameraControl_iid .

另请参阅

requestControl() QCamera

class QCameraControl ( [ parent=None ] ) ¶

param parent

QObject

Constructs a camera control object with parent .

PySide2.QtMultimedia.QCameraControl. PropertyChangeType ¶

常量	描述
QCameraControl.CaptureMode	Indicates the capture mode is changed.
QCameraControl.ImageEncodingSettings	Image encoder settings are changed, including resolution.
QCameraControl.VideoEncodingSettings	Video encoder settings are changed, including audio, video and container settings.
QCameraControl.Viewfinder	Viewfinder is changed.
QCameraControl.ViewfinderSettings	Viewfinder settings are changed.

PySide2.QtMultimedia.QCameraControl. canChangeProperty ( changeType , status ) ¶

参数

• changeType – PropertyChangeType

• status – Status

返回类型

bool

Returns true if backend can effectively apply changing camera properties of changeType type while the camera state is QCamera::Active and camera status matches status 参数。

If backend doesn’t support applying this change in the active state, it will be stopped before the settings are changed and restarted after. Otherwise the backend should apply the change in the current state, with the camera status indicating the progress, if necessary.

PySide2.QtMultimedia.QCameraControl. captureMode ( ) ¶

返回类型

CaptureModes

Returns the current capture mode.

另请参阅

setCaptureMode()

PySide2.QtMultimedia.QCameraControl. captureModeChanged ( mode ) ¶

参数

mode – CaptureModes

PySide2.QtMultimedia.QCameraControl. error ( error , errorString ) ¶

参数

• error – int

• errorString – unicode

PySide2.QtMultimedia.QCameraControl. isCaptureModeSupported ( mode ) ¶

参数

mode – CaptureModes

返回类型

bool

Returns true if the capture mode is suported.

PySide2.QtMultimedia.QCameraControl. setCaptureMode ( arg__1 ) ¶

参数

arg__1 – CaptureModes

Sets the current capture mode .

The capture mode changes are synchronous and allowed in any camera state.

If the capture mode is changed while camera is active, it’s recommended to change status to LoadedStatus and start activating the camera in the next event loop with the status changed to StartingStatus . This allows the capture settings to be applied before camera is started. Than change the status to QCamera::StartedStatus when the capture mode change is done.

另请参阅

captureMode()

PySide2.QtMultimedia.QCameraControl. setState ( state ) ¶

参数

state – State

Sets the camera state .

State changes are synchronous and indicate user intention, while camera status is used as a feedback mechanism to inform application about backend status. Status changes are reported asynchronously with statusChanged() 信号。

另请参阅

state() State

PySide2.QtMultimedia.QCameraControl. state ( ) ¶

返回类型

State

Returns the state of the camera service.

另请参阅

setState() state

PySide2.QtMultimedia.QCameraControl. stateChanged ( arg__1 ) ¶

参数

arg__1 – State

PySide2.QtMultimedia.QCameraControl. status ( ) ¶

返回类型

Status

Returns the status of the camera service.

另请参阅

state

PySide2.QtMultimedia.QCameraControl. statusChanged ( arg__1 ) ¶

参数

arg__1 – Status