QMediaCaptureSession Class
The QMediaCaptureSession class allows capturing of audio and video content. More...
| Header: | #include <QMediaCaptureSession> |
| CMake: | find_package(Qt6 REQUIRED COMPONENTS Multimedia) target_link_libraries(mytarget PRIVATE Qt6::Multimedia) |
| qmake: | QT += multimedia |
| Instantiated By: | CaptureSession |
| Inherits: | QObject |
Properties
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Public Functions
| QMediaCaptureSession(QObject *parent = nullptr) | |
| virtual | ~QMediaCaptureSession() |
| QAudioInput * | audioInput() const |
| QAudioOutput * | audioOutput() const |
| QCamera * | camera() const |
| QImageCapture * | imageCapture() |
| QMediaRecorder * | recorder() |
| QScreenCapture * | screenCapture() |
| void | setAudioInput(QAudioInput *input) |
| void | setAudioOutput(QAudioOutput *output) |
| void | setCamera(QCamera *camera) |
| void | setImageCapture(QImageCapture *imageCapture) |
| void | setRecorder(QMediaRecorder *recorder) |
| void | setScreenCapture(QScreenCapture *screenCapture) |
| void | setVideoOutput(QObject *output) |
| void | setVideoSink(QVideoSink *sink) |
| void | setWindowCapture(QWindowCapture *windowCapture) |
| QObject * | videoOutput() const |
| QVideoSink * | videoSink() const |
| QWindowCapture * | windowCapture() |
Signals
| void | audioInputChanged() |
| void | audioOutputChanged() |
| void | cameraChanged() |
| void | imageCaptureChanged() |
| void | recorderChanged() |
| void | screenCaptureChanged() |
| void | videoOutputChanged() |
| void | windowCaptureChanged() |
Detailed Description
The QMediaCaptureSession is the central class that manages capturing of media on the local device.
You can connect a video input to QMediaCaptureSession using setCamera(), setScreenCapture() or setWindowCapture(). A preview of the captured media can be seen by setting a QVideoWidget or QGraphicsVideoItem using setVideoOutput().
You can connect a microphone to QMediaCaptureSession using setAudioInput(). The captured sound can be heard by routing the audio to an output device using setAudioOutput().
You can capture still images from a camera by setting a QImageCapture object on the capture session, and record audio/video using a QMediaRecorder.
See also QCamera, QAudioDevice, QMediaRecorder, QImageCapture, QScreenCapture, QWindowCapture, QMediaRecorder, and QGraphicsVideoItem.
Property Documentation
audioInput : QAudioInput*
Returns the device that is being used to capture audio.
Access functions:
| QAudioInput * | audioInput() const |
| void | setAudioInput(QAudioInput *input) |
Notifier signal:
| void | audioInputChanged() |
audioOutput : QAudioOutput*
Returns the audio output for the session.
Access functions:
| QAudioOutput * | audioOutput() const |
| void | setAudioOutput(QAudioOutput *output) |
Notifier signal:
| void | audioOutputChanged() |
camera : QCamera*
This property holds the camera used to capture video.
Record video or take images by adding a camera to the capture session using this property.
Access functions:
| QCamera * | camera() const |
| void | setCamera(QCamera *camera) |
Notifier signal:
| void | cameraChanged() |
imageCapture : QImageCapture*
This property holds the object used to capture still images.
Add a QImageCapture object to the capture session to enable capturing of still images from the camera.
Access functions:
| QImageCapture * | imageCapture() |
| void | setImageCapture(QImageCapture *imageCapture) |
Notifier signal:
| void | imageCaptureChanged() |
recorder : QMediaRecorder*
This property holds the recorder object used to capture audio/video.
Add a QMediaRecorder object to the capture session to enable recording of audio and/or video from the capture session.
Access functions:
| QMediaRecorder * | recorder() |
| void | setRecorder(QMediaRecorder *recorder) |
Notifier signal:
| void | recorderChanged() |
[since 6.5] screenCapture : QScreenCapture*
This property holds the object used to capture a screen.
Record a screen by adding a screen capture object to the capture session using this property.
This property was introduced in Qt 6.5.
Access functions:
| QScreenCapture * | screenCapture() |
| void | setScreenCapture(QScreenCapture *screenCapture) |
Notifier signal:
| void | screenCaptureChanged() |
videoOutput : QObject*
Returns the video output for the session.
Access functions:
| QObject * | videoOutput() const |
| void | setVideoOutput(QObject *output) |
Notifier signal:
| void | videoOutputChanged() |
[since 6.6] windowCapture : QWindowCapture*
This property holds the object used to capture a window.
Record a window by adding a window capture objet to the capture session using this property.
This property was introduced in Qt 6.6.
Access functions:
| QWindowCapture * | windowCapture() |
| void | setWindowCapture(QWindowCapture *windowCapture) |
Notifier signal:
| void | windowCaptureChanged() |
Member Function Documentation
[explicit] QMediaCaptureSession::QMediaCaptureSession(QObject *parent = nullptr)
Creates a session for media capture from the parent object.
[virtual noexcept] QMediaCaptureSession::~QMediaCaptureSession()
Destroys the session.
void QMediaCaptureSession::setAudioInput(QAudioInput *input)
Sets the audio input device to input. If setting it to an empty QAudioDevice the capture session will use the default input as defined by the operating system.
Note: Setter function for property audioInput.
See also audioInput().
void QMediaCaptureSession::setAudioOutput(QAudioOutput *output)
Sets the audio output device to output.
Setting an audio output device enables audio routing from an audio input device.
Note: Setter function for property audioOutput.
See also audioOutput().
void QMediaCaptureSession::setVideoOutput(QObject *output)
Sets a QObject, (output), to a video preview for the capture session.
A QObject based preview is expected to have an invokable videoSink() method that returns a QVideoSink.
The previously set preview is detached.
Note: Setter function for property videoOutput.
See also videoOutput().
void QMediaCaptureSession::setVideoSink(QVideoSink *sink)
Sets a QVideoSink, (sink), to a video preview for the capture session.
A QObject based preview is expected to have an invokable videoSink() method that returns a QVideoSink.
The previously set preview is detached.
See also videoSink().
QVideoSink *QMediaCaptureSession::videoSink() const
Returns the QVideoSink for the session.
See also setVideoSink().
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