QImageCapture

The QImageCapture class is used for the recording of media content. More…

Synopsis

Functions

• def addMetaData (metaData)

• def capture ()

• def captureSession ()

• def captureToFile ([location=””])

• def error ()

• def errorChanged ()

• def errorOccurred (id, error, errorString)

• def errorString ()

• def fileFormat ()

• def fileFormatChanged ()

• def imageAvailable (id, frame)

• def imageCaptured (id, preview)

• def imageExposed (id)

• def imageMetadataAvailable (id, metaData)

• def imageSaved (id, fileName)

• def isAvailable ()

• def isReadyForCapture ()

• def metaData ()

• def metaDataChanged ()

• def quality ()

• def qualityChanged ()

• def readyForCaptureChanged (ready)

• def resolution ()

• def resolutionChanged ()

• def setFileFormat (format)

• def setMetaData (metaData)

• def setQuality (quality)

• def setResolution (arg__1)

• def setResolution (width, height)

Static functions

• def fileFormatDescription (c)

• def fileFormatName (c)

• def supportedFormats ()

Detailed Description

The QImageCapture class is a high level images recording class. It’s not intended to be used alone but for accessing the media recording functions of other media objects, like QCamera .

QMediaCaptureSession captureSession;
camera = new QCamera;
captureSession.setCamera(camera);

QVideoWidget *preview = new QVideoWidget();
preview->show();
captureSession.setVideoOutput(preview);

imageCapture = new QImageCapture(camera);
captureSession.setImageCapture(imageCapture);

camera->start();        //on shutter button pressed
imageCapture->capture();

See also

QCamera

class PySide6.QtMultimedia.QImageCapture([parent=None])

Parameters

parent – PySide6.QtCore.QObject

Constructs a image capture object, from a parent, that can capture individual still images produced by a camera.

You must connect both an image capture object and a QCamera to a capture session to capture images.

PySide6.QtMultimedia.QImageCapture.Error

Constant	Description
QImageCapture.NoError	No Errors.
QImageCapture.NotReadyError	The service is not ready for capture yet.
QImageCapture.ResourceError	Device is not ready or not available.
QImageCapture.OutOfSpaceError	No space left on device.
QImageCapture.NotSupportedFeatureError	Device does not support stillimages capture.
QImageCapture.FormatError	Current format is not supported.

PySide6.QtMultimedia.QImageCapture.Quality

Enumerates quality encoding levels.

Constant	Description
QImageCapture.VeryLowQuality
QImageCapture.LowQuality
QImageCapture.NormalQuality
QImageCapture.HighQuality
QImageCapture.VeryHighQuality

PySide6.QtMultimedia.QImageCapture.FileFormat

PySide6.QtMultimedia.QImageCapture.addMetaData(metaData)

Parameters

metaData – PySide6.QtMultimedia.QMediaMetaData

Adds additional metaData to any existing meta data, that is embedded into the captured image.

PySide6.QtMultimedia.QImageCapture.capture()

Return type

int

Capture the image and make it available as a QImage . This operation is asynchronous in majority of cases, followed by signals imageExposed() , imageCaptured() or error() .

returns the capture Id parameter, used with imageExposed() , imageCaptured() and imageSaved() signals.

See also

isReadyForCapture()

PySide6.QtMultimedia.QImageCapture.captureSession()

Return type

PySide6.QtMultimedia.QMediaCaptureSession

Returns the capture session this camera is connected to, or a nullptr if the camera is not connected to a capture session.

Use setImageCapture() to connect the image capture to a session.

PySide6.QtMultimedia.QImageCapture.captureToFile([location=""])

Parameters

location – str

Return type

int

Capture the image and save it to file. This operation is asynchronous in majority of cases, followed by signals imageExposed() , imageCaptured() , imageSaved() or error() .

If an empty file is passed, the camera back end chooses the default location and naming scheme for photos on the system, if only file name without full path is specified, the image will be saved to the default directory, with a full path reported with imageCaptured() and imageSaved() signals.

QCamera saves all the capture parameters like exposure settings or image processing parameters, so changes to camera parameters after capture() is called do not affect previous capture requests.

capture returns the capture Id parameter, used with imageExposed() , imageCaptured() and imageSaved() signals.

See also

isReadyForCapture()

PySide6.QtMultimedia.QImageCapture.error()

Return type

Error

Returns the current error state.

See also

errorString()

PySide6.QtMultimedia.QImageCapture.errorChanged()

PySide6.QtMultimedia.QImageCapture.errorOccurred(id, error, errorString)

Parameters

• id – int

• error – Error

• errorString – str

Signals that the capture request id has failed with an error and errorString description.

PySide6.QtMultimedia.QImageCapture.errorString()

Return type

str

Returns a string describing the current error state.

See also

error()

PySide6.QtMultimedia.QImageCapture.fileFormat()

Return type

FileFormat

See also

setFileFormat()

PySide6.QtMultimedia.QImageCapture.fileFormatChanged()

static PySide6.QtMultimedia.QImageCapture.fileFormatDescription(c)

Parameters

c – FileFormat

Return type

str

static PySide6.QtMultimedia.QImageCapture.fileFormatName(c)

Parameters

c – FileFormat

Return type

str

PySide6.QtMultimedia.QImageCapture.imageAvailable(id, frame)

Parameters

• id – int

• frame – PySide6.QtMultimedia.QVideoFrame

Signal emitted when QImageCapture::CaptureToBuffer is set and the frame with request id is available.

PySide6.QtMultimedia.QImageCapture.imageCaptured(id, preview)

Parameters

• id – int

• preview – PySide6.QtGui.QImage

Signal emitted when the frame with request id was captured, but not processed and saved yet. Frame preview can be displayed to user.

PySide6.QtMultimedia.QImageCapture.imageExposed(id)

Parameters

id – int

Signal emitted when the frame with request id was exposed.

PySide6.QtMultimedia.QImageCapture.imageMetadataAvailable(id, metaData)

Parameters

• id – int

• metaData – PySide6.QtMultimedia.QMediaMetaData

PySide6.QtMultimedia.QImageCapture.imageSaved(id, fileName)

Parameters

• id – int

• fileName – str

Signal emitted when QImageCapture::CaptureToFile is set and the frame with request id was saved to fileName.

PySide6.QtMultimedia.QImageCapture.isAvailable()

Return type

bool

Returns true if the images capture service ready to use.

PySide6.QtMultimedia.QImageCapture.isReadyForCapture()

Return type

bool

PySide6.QtMultimedia.QImageCapture.metaData()

Return type

PySide6.QtMultimedia.QMediaMetaData

See also

setMetaData()

PySide6.QtMultimedia.QImageCapture.metaDataChanged()

PySide6.QtMultimedia.QImageCapture.quality()

Return type

Quality

See also

setQuality()

PySide6.QtMultimedia.QImageCapture.qualityChanged()

PySide6.QtMultimedia.QImageCapture.readyForCaptureChanged(ready)

Parameters

ready – bool

Signals that a camera’s ready for capture state has changed.

PySide6.QtMultimedia.QImageCapture.resolution()

Return type

PySide6.QtCore.QSize

Returns the resolution of the encoded image.

See also

setResolution()

PySide6.QtMultimedia.QImageCapture.resolutionChanged()

PySide6.QtMultimedia.QImageCapture.setFileFormat(format)

Parameters

format – FileFormat

Sets the image format.

See also

fileFormat()

PySide6.QtMultimedia.QImageCapture.setMetaData(metaData)

Parameters

metaData – PySide6.QtMultimedia.QMediaMetaData

Replaces any existing meta data, to be embedded into the captured image, with a set of metaData.

See also

metaData()

PySide6.QtMultimedia.QImageCapture.setQuality(quality)

Parameters

quality – Quality

Sets the image encoding quality.

See also

quality()

PySide6.QtMultimedia.QImageCapture.setResolution(arg__1)

Parameters

arg__1 – PySide6.QtCore.QSize

Sets the resolution of the encoded image.

An empty QSize indicates the encoder should make an optimal choice based on what is available from the image source and the limitations of the codec.

See also

resolution()

PySide6.QtMultimedia.QImageCapture.setResolution(width, height)

Parameters

• width – int

• height – int

Sets the width and height of the resolution of the encoded image.

This is an overloaded function.

static PySide6.QtMultimedia.QImageCapture.supportedFormats()

Return type