QCameraFeedbackControl

The QCameraFeedbackControl class allows controlling feedback (sounds etc) during camera operation. More

Inheritance diagram of PySide2.QtMultimedia.QCameraFeedbackControl

Detailed Description

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.

Note

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 as defined in QCameraFeedbackControl_iid .

See also

QCamera

class PySide2.QtMultimedia.QCameraFeedbackControl([parent=None])
param parent

PySide2.QtCore.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.

Constant

Description

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)
Parameters

arg__1EventType

Return type

bool

Returns true if the feedback for event is enabled.

PySide2.QtMultimedia.QCameraFeedbackControl.isEventFeedbackLocked(arg__1)
Parameters

arg__1EventType

Return type

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)
Parameters

arg__1EventType

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

PySide2.QtMultimedia.QCameraFeedbackControl.setEventFeedbackEnabled(arg__1, arg__2)
Parameters
Return type

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).

PySide2.QtMultimedia.QCameraFeedbackControl.setEventFeedbackSound(arg__1, filePath)
Parameters
Return type

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).

Note

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.