QCameraFeedbackControl ¶

详细描述 ¶

When using a camera, there are several times when some form of feedback to the user is given - for example, when an image is taken, or when recording is started. You can enable or disable some of this feedback, or adjust what sound might be played for these actions.

In some cases it may be undesirable to play a sound effect - for example, when initiating video recording the sound itself may be recorded.

注意

In some countries or regions, feedback sounds or other indications (e.g. a red light) are mandatory during camera operation. In these cases, you can check isEventFeedbackLocked to check if that type of feedback can be modified. Any attempts to change a locked feedback type will be ignored.

The interface name of QCameraFeedbackControl is org.qt-project.qt.camerafeedbackcontrol/5.0 作为定义在 QCameraFeedbackControl_iid .

另请参阅

QCamera

class QCameraFeedbackControl ( [ parent=None ] ) ¶

param parent

QObject

Constructs a camera feedback control object with parent .

PySide2.QtMultimedia.QCameraFeedbackControl. EventType ¶

This enumeration describes certain events that occur during camera usage. You can associate some form of feedback to be given when the event occurs, or check whether feedback for this event is enabled or locked so that changes cannot be made.

常量	描述
QCameraFeedbackControl.ViewfinderStarted	The viewfinder stream was started (even if not visible)
QCameraFeedbackControl.ViewfinderStopped	The viewfinder stream was stopped
QCameraFeedbackControl.ImageCaptured	An image was captured but not yet fully processed
QCameraFeedbackControl.ImageSaved	An image is fully available and saved somewhere.
QCameraFeedbackControl.ImageError	An error occurred while capturing an image
QCameraFeedbackControl.RecordingStarted	Video recording has started
QCameraFeedbackControl.RecordingInProgress	Video recording is in progress
QCameraFeedbackControl.RecordingStopped	Video recording has stopped
QCameraFeedbackControl.AutoFocusInProgress	The camera is trying to automatically focus
QCameraFeedbackControl.AutoFocusLocked	The camera has automatically focused successfully
QCameraFeedbackControl.AutoFocusFailed	The camera was unable to focus automatically

PySide2.QtMultimedia.QCameraFeedbackControl. isEventFeedbackEnabled ( arg__1 ) ¶

参数

arg__1 – EventType

返回类型

bool

Returns true if the feedback for event is enabled.

PySide2.QtMultimedia.QCameraFeedbackControl. isEventFeedbackLocked ( arg__1 ) ¶

参数

arg__1 – EventType

返回类型

bool

Returns true if the feedback setting for event is locked. This may be true because of legal compliance issues, or because configurability of this event’s feedback is not supported.

PySide2.QtMultimedia.QCameraFeedbackControl. resetEventFeedback ( arg__1 ) ¶

参数

arg__1 – EventType

Restores the feedback setting for this event to its default setting.

PySide2.QtMultimedia.QCameraFeedbackControl. setEventFeedbackEnabled ( arg__1 , arg__2 ) ¶

参数

• arg__1 – EventType

• arg__2 – bool

返回类型

bool

Turns on feedback for the specific event if enabled is true, otherwise disables the feedback. Returns true if the feedback could be modified, or false otherwise (e.g. this feedback type is locked).

另请参阅

isEventFeedbackEnabled()

PySide2.QtMultimedia.QCameraFeedbackControl. setEventFeedbackSound ( arg__1 , filePath ) ¶

参数

• arg__1 – EventType

• filePath – unicode

返回类型

bool

When the given event occurs, the sound effect referenced by filePath will be played instead of the default sound.

If this feedback type is locked, or if the supplied path is inaccessible, this function will return false. In addition, some forms of feedback may be non-auditory (e.g. a red light, or a vibration), and false may be returned in this case.

The file referenced should be linear PCM (WAV format).

注意

In the case that a valid file path to an unsupported file is given, this function will return true but the feedback will use the original setting.