QMediaRecorderControl Class▲
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Header: QMediaRecorderControl
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qmake: QT += multimedia
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Inherits: QMediaControl
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Inherited By:
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Group: QMediaRecorderControl is part of multimedia_control
Detailed Description▲
Generally you will use the QMediaRecorder class in application code - this class is mostly used when implementing a new QMediaService or if there is access to specific low level functionality not otherwise present in QMediaRecorder.
If a QMediaService can record media it will implement QMediaRecorderControl. This control provides a means to set the output location, and record, pause and stop recording via the setState() method. It also provides feedback on the duration of the recording.
The interface name of QMediaRecorderControl is org.qt-project.qt.mediarecordercontrol/5.0 as defined in QMediaRecorderControl_iid.
See Also▲
See also QMediaService::requestControl(), QMediaRecorder
Member Function Documentation▲
[explicit protected] QMediaRecorderControl::QMediaRecorderControl(QObject *parent = nullptr)▲
Constructs a media recorder control with the given parent.
[virtual] QMediaRecorderControl::~QMediaRecorderControl()▲
Destroys a media recorder control.
void QMediaRecorderControl::actualLocationChanged(const QUrl &location)▲
Signals that the actual media location has changed. This signal should be emitted at start of recording.
[pure virtual] void QMediaRecorderControl::applySettings()▲
Commits the encoder settings and performs pre-initialization to reduce delays when recording is started.
[pure virtual] qint64 QMediaRecorderControl::duration() const▲
Return the current duration in milliseconds.
void QMediaRecorderControl::durationChanged(qint64 duration)▲
Signals that the duration of the recorded media has changed.
This only emitted when there is a discontinuous change in the duration such as being reset to 0.
void QMediaRecorderControl::error(int error, const QString &errorString)▲
Signals that an error has occurred. The errorString describes the error.
[pure virtual] bool QMediaRecorderControl::isMuted() const▲
Returns true if the recorder is muted, and false if it is not.
void QMediaRecorderControl::mutedChanged(bool muted)▲
Signals that the muted state of a media recorder has changed.
[pure virtual] QUrl QMediaRecorderControl::outputLocation() const▲
[pure virtual] void QMediaRecorderControl::setMuted(bool muted)▲
[pure virtual] bool QMediaRecorderControl::setOutputLocation(const QUrl &location)▲
Sets the output location and returns if this operation is successful. If file at the output location already exists, it should be overwritten.
The location can be relative or empty; in this case the service should use the system specific place and file naming scheme.
After recording has started, the backend should report the actual file location with actualLocationChanged() signal.
See Also▲
See also outputLocation()
[pure virtual] void QMediaRecorderControl::setState(QMediaRecorder::State state)▲
[pure virtual] void QMediaRecorderControl::setVolume(qreal volume)▲
Sets the audio volume of a media recorder control.
The volume is scaled linearly, ranging from 0 (silence) to 100 (full volume).
See Also▲
See also volume()
[pure virtual] QMediaRecorder::State QMediaRecorderControl::state() const▲
void QMediaRecorderControl::stateChanged(QMediaRecorder::State state)▲
Signals that the state of a media recorder has changed.
[pure virtual] QMediaRecorder::Status QMediaRecorderControl::status() const▲
Return the current recording status.
void QMediaRecorderControl::statusChanged(QMediaRecorder::Status status)▲
Signals that the status of a media recorder has changed.
[pure virtual] qreal QMediaRecorderControl::volume() const▲
void QMediaRecorderControl::volumeChanged(qreal gain)▲
Signals that the audio gain value has changed.
Macro Documentation▲
QMediaRecorderControl_iid▲
org.qt-project.qt.mediarecordercontrol/5.0
Defines the interface name of the QMediaRecorderControl class.