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<td >Qt 5.9</td><td ><a href="qtmultimedia-index.html">Qt Multimedia</a></td><td >Qt Multimedia C++ Classes</td></tr></table><table class="buildversion"><tr>
<td id="buildversion" width="100%" align="right">Qt 5.9.4 Reference Documentation</td>
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<h3><a name="toc">Contents</a></h3>
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<li class="level1"><a href="#namespaces">Namespaces</a></li>
<li class="level1"><a href="#classes">Classes</a></li>
<li class="level2"><a href="#qt-multimedia-module">Qt Multimedia Module</a></li>
<li class="level2"><a href="#qt-multimedia-widgets-module">Qt Multimedia Widgets Module</a></li>
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<h1 class="title">Qt Multimedia C++ Classes</h1>
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<p>The C++ classes provide more control over the multimedia content than the QML alternatives. If your application is serving complex use cases such as decoding media files, accessing video or audio buffers, use the C++ alternative. For more details about the complex audio, video, and camera use cases supported by the C++ classes, refer to <a href="multimediaoverview.html">Multimedia Overview</a>.</p>
<a name="namespaces"></a>
<h2 id="namespaces">Namespaces</h2>
<div class="table"><table class="annotated">
<tr class="odd topAlign"><td class="tblName"><p><a href="qaudio.html">QAudio</a></p></td><td class="tblDescr"><p>Contains enums used by the audio classes</p></td></tr>
<tr class="even topAlign"><td class="tblName"><p><a href="qmediametadata.html">QMediaMetaData</a></p></td><td class="tblDescr"><p>Provides identifiers for meta-data attributes</p></td></tr>
<tr class="odd topAlign"><td class="tblName"><p><a href="qmultimedia.html">QMultimedia</a></p></td><td class="tblDescr"><p>Contains miscellaneous identifiers used throughout the Qt Multimedia library</p></td></tr>
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<a name="classes"></a>
<h2 id="classes">Classes</h2>
<a name="qt-multimedia-module"></a>
<h3 >Qt Multimedia Module</h3>
<div class="table"><table class="annotated">
<tr class="odd topAlign"><td class="tblName"><p><a href="qaudiobuffer.html">QAudioBuffer</a></p></td><td class="tblDescr"><p>Represents a collection of audio samples with a specific format and sample rate</p></td></tr>
<tr class="even topAlign"><td class="tblName"><p><a href="qaudiobuffer-stereoframe.html">QAudioBuffer::StereoFrame</a></p></td><td class="tblDescr"><p>Simple wrapper for a stereo audio frame</p></td></tr>
<tr class="odd topAlign"><td class="tblName"><p><a href="qaudiodecoder.html">QAudioDecoder</a></p></td><td class="tblDescr"><p>Allows decoding audio</p></td></tr>
<tr class="even topAlign"><td class="tblName"><p><a href="qaudiodeviceinfo.html">QAudioDeviceInfo</a></p></td><td class="tblDescr"><p>Interface to query audio devices and their functionality</p></td></tr>
<tr class="odd topAlign"><td class="tblName"><p><a href="qaudioformat.html">QAudioFormat</a></p></td><td class="tblDescr"><p>Stores audio stream parameter information</p></td></tr>
<tr class="even topAlign"><td class="tblName"><p><a href="qaudioinput.html">QAudioInput</a></p></td><td class="tblDescr"><p>Interface for receiving audio data from an audio input device</p></td></tr>
<tr class="odd topAlign"><td class="tblName"><p><a href="qaudiooutput.html">QAudioOutput</a></p></td><td class="tblDescr"><p>Interface for sending audio data to an audio output device</p></td></tr>
<tr class="even topAlign"><td class="tblName"><p><a href="qaudioprobe.html">QAudioProbe</a></p></td><td class="tblDescr"><p>Allows you to monitor audio being played or recorded</p></td></tr>
<tr class="odd topAlign"><td class="tblName"><p><a href="qabstractaudiodeviceinfo.html">QAbstractAudioDeviceInfo</a></p></td><td class="tblDescr"><p>Base class for audio backends</p></td></tr>
<tr class="even topAlign"><td class="tblName"><p><a href="qabstractaudioinput.html">QAbstractAudioInput</a></p></td><td class="tblDescr"><p>Access for QAudioInput to access the audio device provided by the plugin</p></td></tr>
<tr class="odd topAlign"><td class="tblName"><p><a href="qabstractaudiooutput.html">QAbstractAudioOutput</a></p></td><td class="tblDescr"><p>Base class for audio backends</p></td></tr>
<tr class="even topAlign"><td class="tblName"><p><a href="qaudiosystemplugin.html">QAudioSystemPlugin</a></p></td><td class="tblDescr"><p>Abstract base for audio plugins</p></td></tr>
<tr class="odd topAlign"><td class="tblName"><p><a href="qsound.html">QSound</a></p></td><td class="tblDescr"><p>Method to play .wav sound files</p></td></tr>
<tr class="even topAlign"><td class="tblName"><p><a href="qsoundeffect.html">QSoundEffect</a></p></td><td class="tblDescr"><p>Way to play low latency sound effects</p></td></tr>
<tr class="odd topAlign"><td class="tblName"><p><a href="qcamera-frameraterange.html">QCamera::FrameRateRange</a></p></td><td class="tblDescr"><p>A FrameRateRange represents a range of frame rates as minimum and maximum rate</p></td></tr>
<tr class="even topAlign"><td class="tblName"><p><a href="qcamera.html">QCamera</a></p></td><td class="tblDescr"><p>Interface for system camera devices</p></td></tr>
<tr class="odd topAlign"><td class="tblName"><p><a href="qcameraexposure.html">QCameraExposure</a></p></td><td class="tblDescr"><p>Interface for exposure related camera settings</p></td></tr>
<tr class="even topAlign"><td class="tblName"><p><a href="qcamerafocus.html">QCameraFocus</a></p></td><td class="tblDescr"><p>Interface for focus and zoom related camera settings</p></td></tr>
<tr class="odd topAlign"><td class="tblName"><p><a href="qcamerafocuszone.html">QCameraFocusZone</a></p></td><td class="tblDescr"><p>Information on zones used for autofocusing a camera</p></td></tr>
<tr class="even topAlign"><td class="tblName"><p><a href="qcameraimagecapture.html">QCameraImageCapture</a></p></td><td class="tblDescr"><p>Used for the recording of media content</p></td></tr>
<tr class="odd topAlign"><td class="tblName"><p><a href="qcameraimageprocessing.html">QCameraImageProcessing</a></p></td><td class="tblDescr"><p>Interface for image processing related camera settings</p></td></tr>
<tr class="even topAlign"><td class="tblName"><p><a href="qcamerainfo.html">QCameraInfo</a></p></td><td class="tblDescr"><p>General information about camera devices</p></td></tr>
<tr class="odd topAlign"><td class="tblName"><p><a href="qcameraviewfindersettings.html">QCameraViewfinderSettings</a></p></td><td class="tblDescr"><p>Set of viewfinder settings</p></td></tr>
<tr class="even topAlign"><td class="tblName"><p><a href="qaudiodecodercontrol.html">QAudioDecoderControl</a></p></td><td class="tblDescr"><p>Access to the audio decoding functionality of a QMediaService</p></td></tr>
<tr class="odd topAlign"><td class="tblName"><p><a href="qaudioencodersettingscontrol.html">QAudioEncoderSettingsControl</a></p></td><td class="tblDescr"><p>Access to the settings of a media service that performs audio encoding</p></td></tr>
<tr class="even topAlign"><td class="tblName"><p><a href="qaudioinputselectorcontrol.html">QAudioInputSelectorControl</a></p></td><td class="tblDescr"><p>Audio input selector media control</p></td></tr>
<tr class="odd topAlign"><td class="tblName"><p><a href="qaudiooutputselectorcontrol.html">QAudioOutputSelectorControl</a></p></td><td class="tblDescr"><p>Audio output selector media control</p></td></tr>
<tr class="even topAlign"><td class="tblName"><p><a href="qaudiorolecontrol.html">QAudioRoleControl</a></p></td><td class="tblDescr"><p>Control over the audio role of a media object</p></td></tr>
<tr class="odd topAlign"><td class="tblName"><p><a href="qcameracapturebufferformatcontrol.html">QCameraCaptureBufferFormatControl</a></p></td><td class="tblDescr"><p>Control for setting the capture buffer format</p></td></tr>
<tr class="even topAlign"><td class="tblName"><p><a href="qcameracapturedestinationcontrol.html">QCameraCaptureDestinationControl</a></p></td><td class="tblDescr"><p>Control for setting capture destination</p></td></tr>
<tr class="odd topAlign"><td class="tblName"><p><a href="qcameracontrol.html">QCameraControl</a></p></td><td class="tblDescr"><p>Abstract base class for classes that control still cameras or video cameras</p></td></tr>
<tr class="even topAlign"><td class="tblName"><p><a href="qcameraexposurecontrol.html">QCameraExposureControl</a></p></td><td class="tblDescr"><p>Allows controlling camera exposure parameters</p></td></tr>
<tr class="odd topAlign"><td class="tblName"><p><a href="qcamerafeedbackcontrol.html">QCameraFeedbackControl</a></p></td><td class="tblDescr"><p>Allows controlling feedback (sounds etc) during camera operation</p></td></tr>
<tr class="even topAlign"><td class="tblName"><p><a href="qcameraflashcontrol.html">QCameraFlashControl</a></p></td><td class="tblDescr"><p>Allows controlling a camera's flash</p></td></tr>
<tr class="odd topAlign"><td class="tblName"><p><a href="qcamerafocuscontrol.html">QCameraFocusControl</a></p></td><td class="tblDescr"><p>Supplies control for focusing related camera parameters</p></td></tr>
<tr class="even topAlign"><td class="tblName"><p><a href="qcameraimagecapturecontrol.html">QCameraImageCaptureControl</a></p></td><td class="tblDescr"><p>Control interface for image capture services</p></td></tr>
<tr class="odd topAlign"><td class="tblName"><p><a href="qcameraimageprocessingcontrol.html">QCameraImageProcessingControl</a></p></td><td class="tblDescr"><p>Abstract class for controlling image processing parameters, like white balance, contrast, saturation, sharpening and denoising</p></td></tr>
<tr class="even topAlign"><td class="tblName"><p><a href="qcamerainfocontrol.html">QCameraInfoControl</a></p></td><td class="tblDescr"><p>Camera info media control</p></td></tr>
<tr class="odd topAlign"><td class="tblName"><p><a href="qcameralockscontrol.html">QCameraLocksControl</a></p></td><td class="tblDescr"><p>Abstract base class for classes that control still cameras or video cameras</p></td></tr>
<tr class="even topAlign"><td class="tblName"><p><a href="qcameraviewfindersettingscontrol.html">QCameraViewfinderSettingsControl</a></p></td><td class="tblDescr"><p>Abstract class for controlling camera viewfinder parameters</p></td></tr>
<tr class="odd topAlign"><td class="tblName"><p><a href="qcameraviewfindersettingscontrol2.html">QCameraViewfinderSettingsControl2</a></p></td><td class="tblDescr"><p>Access to the viewfinder settings of a camera media service</p></td></tr>
<tr class="even topAlign"><td class="tblName"><p><a href="qcamerazoomcontrol.html">QCameraZoomControl</a></p></td><td class="tblDescr"><p>Supplies control for optical and digital camera zoom</p></td></tr>
<tr class="odd topAlign"><td class="tblName"><p><a href="qimageencodercontrol.html">QImageEncoderControl</a></p></td><td class="tblDescr"><p>Access to the settings of a media service that performs image encoding</p></td></tr>
<tr class="even topAlign"><td class="tblName"><p><a href="qmediaaudioprobecontrol.html">QMediaAudioProbeControl</a></p></td><td class="tblDescr"><p>Allows control over probing audio data in media objects</p></td></tr>
<tr class="odd topAlign"><td class="tblName"><p><a href="qmediaavailabilitycontrol.html">QMediaAvailabilityControl</a></p></td><td class="tblDescr"><p>Supplies a control for reporting availability of a service</p></td></tr>
<tr class="even topAlign"><td class="tblName"><p><a href="qmediacontainercontrol.html">QMediaContainerControl</a></p></td><td class="tblDescr"><p>Access to the output container format of a QMediaService</p></td></tr>
<tr class="odd topAlign"><td class="tblName"><p><a href="qmediagaplessplaybackcontrol.html">QMediaGaplessPlaybackControl</a></p></td><td class="tblDescr"><p>Access to the gapless playback related control of a QMediaService</p></td></tr>
<tr class="even topAlign"><td class="tblName"><p><a href="qmedianetworkaccesscontrol.html">QMediaNetworkAccessControl</a></p></td><td class="tblDescr"><p>Allows the setting of the Network Access Point for media related activities</p></td></tr>
<tr class="odd topAlign"><td class="tblName"><p><a href="qmediaplayercontrol.html">QMediaPlayerControl</a></p></td><td class="tblDescr"><p>Access to the media playing functionality of a QMediaService</p></td></tr>
<tr class="even topAlign"><td class="tblName"><p><a href="qmediarecordercontrol.html">QMediaRecorderControl</a></p></td><td class="tblDescr"><p>Access to the recording functionality of a QMediaService</p></td></tr>
<tr class="odd topAlign"><td class="tblName"><p><a href="qmediastreamscontrol.html">QMediaStreamsControl</a></p></td><td class="tblDescr"><p>Media stream selection control</p></td></tr>
<tr class="even topAlign"><td class="tblName"><p><a href="qmediavideoprobecontrol.html">QMediaVideoProbeControl</a></p></td><td class="tblDescr"><p>Allows control over probing video frames in media objects</p></td></tr>
<tr class="odd topAlign"><td class="tblName"><p><a href="qmetadatareadercontrol.html">QMetaDataReaderControl</a></p></td><td class="tblDescr"><p>Read access to the meta-data of a QMediaService's media</p></td></tr>
<tr class="even topAlign"><td class="tblName"><p><a href="qmetadatawritercontrol.html">QMetaDataWriterControl</a></p></td><td class="tblDescr"><p>Write access to the meta-data of a QMediaService's media</p></td></tr>
<tr class="odd topAlign"><td class="tblName"><p><a href="qradiodatacontrol.html">QRadioDataControl</a></p></td><td class="tblDescr"><p>Access to the RDS functionality of the radio in the QMediaService</p></td></tr>
<tr class="even topAlign"><td class="tblName"><p><a href="qradiotunercontrol.html">QRadioTunerControl</a></p></td><td class="tblDescr"><p>Access to the radio tuning functionality of a QMediaService</p></td></tr>
<tr class="odd topAlign"><td class="tblName"><p><a href="qvideodeviceselectorcontrol.html">QVideoDeviceSelectorControl</a></p></td><td class="tblDescr"><p>Video device selector media control</p></td></tr>
<tr class="even topAlign"><td class="tblName"><p><a href="qvideoencodersettingscontrol.html">QVideoEncoderSettingsControl</a></p></td><td class="tblDescr"><p>Access to the settings of a media service that performs video encoding</p></td></tr>
<tr class="odd topAlign"><td class="tblName"><p><a href="qvideorenderercontrol.html">QVideoRendererControl</a></p></td><td class="tblDescr"><p>Media control for rendering video to a QAbstractVideoSurface</p></td></tr>
<tr class="even topAlign"><td class="tblName"><p><a href="qvideowindowcontrol.html">QVideoWindowControl</a></p></td><td class="tblDescr"><p>Media control for rendering video to a window</p></td></tr>
<tr class="odd topAlign"><td class="tblName"><p><a href="qmediacontent.html">QMediaContent</a></p></td><td class="tblDescr"><p>Access to the resources relating to a media content</p></td></tr>
<tr class="even topAlign"><td class="tblName"><p><a href="qmediaplayer.html">QMediaPlayer</a></p></td><td class="tblDescr"><p>Allows the playing of a media source</p></td></tr>
<tr class="odd topAlign"><td class="tblName"><p><a href="qmediaplaylist.html">QMediaPlaylist</a></p></td><td class="tblDescr"><p>List of media content to play</p></td></tr>
<tr class="even topAlign"><td class="tblName"><p><a href="qmediaresource.html">QMediaResource</a></p></td><td class="tblDescr"><p>Description of a media resource</p></td></tr>
<tr class="odd topAlign"><td class="tblName"><p><a href="qmediabindableinterface.html">QMediaBindableInterface</a></p></td><td class="tblDescr"><p>The base class for objects extending media objects functionality</p></td></tr>
<tr class="even topAlign"><td class="tblName"><p><a href="qmediacontrol.html">QMediaControl</a></p></td><td class="tblDescr"><p>Base interface for media service controls</p></td></tr>
<tr class="odd topAlign"><td class="tblName"><p><a href="qmediaobject.html">QMediaObject</a></p></td><td class="tblDescr"><p>Common base for multimedia objects</p></td></tr>
<tr class="even topAlign"><td class="tblName"><p><a href="qmediaservice.html">QMediaService</a></p></td><td class="tblDescr"><p>Common base class for media service implementations</p></td></tr>
<tr class="odd topAlign"><td class="tblName"><p><a href="qmediaservicecamerainfointerface.html">QMediaServiceCameraInfoInterface</a></p></td><td class="tblDescr"><p>Interface provides camera-specific information about devices supported by a camera service plug-in</p></td></tr>
<tr class="even topAlign"><td class="tblName"><p><a href="qmediaservicedefaultdeviceinterface.html">QMediaServiceDefaultDeviceInterface</a></p></td><td class="tblDescr"><p>Interface identifies the default device used by a media service plug-in</p></td></tr>
<tr class="odd topAlign"><td class="tblName"><p><a href="qmediaservicefeaturesinterface.html">QMediaServiceFeaturesInterface</a></p></td><td class="tblDescr"><p>Interface identifies features supported by a media service plug-in</p></td></tr>
<tr class="even topAlign"><td class="tblName"><p><a href="qmediaserviceproviderplugin.html">QMediaServiceProviderPlugin</a></p></td><td class="tblDescr"><p>Interface provides an interface for QMediaService plug-ins</p></td></tr>
<tr class="odd topAlign"><td class="tblName"><p><a href="qmediaservicesupporteddevicesinterface.html">QMediaServiceSupportedDevicesInterface</a></p></td><td class="tblDescr"><p>Interface identifies the devices supported by a media service plug-in</p></td></tr>
<tr class="even topAlign"><td class="tblName"><p><a href="qmediaservicesupportedformatsinterface.html">QMediaServiceSupportedFormatsInterface</a></p></td><td class="tblDescr"><p>Interface identifies if a media service plug-in supports a media format</p></td></tr>
<tr class="odd topAlign"><td class="tblName"><p><a href="qmediatimeinterval.html">QMediaTimeInterval</a></p></td><td class="tblDescr"><p>Represents a time interval with integer precision</p></td></tr>
<tr class="even topAlign"><td class="tblName"><p><a href="qmediatimerange.html">QMediaTimeRange</a></p></td><td class="tblDescr"><p>Represents a set of zero or more disjoint time intervals</p></td></tr>
<tr class="odd topAlign"><td class="tblName"><p><a href="qradiodata.html">QRadioData</a></p></td><td class="tblDescr"><p>Interfaces to the RDS functionality of the system radio</p></td></tr>
<tr class="even topAlign"><td class="tblName"><p><a href="qradiotuner.html">QRadioTuner</a></p></td><td class="tblDescr"><p>Interface to the systems analog radio device</p></td></tr>
<tr class="odd topAlign"><td class="tblName"><p><a href="qaudiorecorder.html">QAudioRecorder</a></p></td><td class="tblDescr"><p>Used for the recording of audio</p></td></tr>
<tr class="even topAlign"><td class="tblName"><p><a href="qaudioencodersettings.html">QAudioEncoderSettings</a></p></td><td class="tblDescr"><p>Set of audio encoder settings</p></td></tr>
<tr class="odd topAlign"><td class="tblName"><p><a href="qimageencodersettings.html">QImageEncoderSettings</a></p></td><td class="tblDescr"><p>Set of image encoder settings</p></td></tr>
<tr class="even topAlign"><td class="tblName"><p><a href="qvideoencodersettings.html">QVideoEncoderSettings</a></p></td><td class="tblDescr"><p>Set of video encoder settings</p></td></tr>
<tr class="odd topAlign"><td class="tblName"><p><a href="qmediarecorder.html">QMediaRecorder</a></p></td><td class="tblDescr"><p>Used for the recording of media content</p></td></tr>
<tr class="even topAlign"><td class="tblName"><p><a href="qabstractplanarvideobuffer.html">QAbstractPlanarVideoBuffer</a></p></td><td class="tblDescr"><p>Abstraction for planar video data</p></td></tr>
<tr class="odd topAlign"><td class="tblName"><p><a href="qabstractvideobuffer.html">QAbstractVideoBuffer</a></p></td><td class="tblDescr"><p>Abstraction for video data</p></td></tr>
<tr class="even topAlign"><td class="tblName"><p><a href="qabstractvideofilter.html">QAbstractVideoFilter</a></p></td><td class="tblDescr"><p>Represents a filter that is applied to the video frames received by a VideoOutput type</p></td></tr>
<tr class="odd topAlign"><td class="tblName"><p><a href="qvideofilterrunnable.html">QVideoFilterRunnable</a></p></td><td class="tblDescr"><p>Represents the implementation of a filter that owns all graphics and computational resources, and performs the actual filtering or calculations</p></td></tr>
<tr class="even topAlign"><td class="tblName"><p><a href="qabstractvideosurface.html">QAbstractVideoSurface</a></p></td><td class="tblDescr"><p>Base class for video presentation surfaces</p></td></tr>
<tr class="odd topAlign"><td class="tblName"><p><a href="qvideoframe.html">QVideoFrame</a></p></td><td class="tblDescr"><p>Represents a frame of video data</p></td></tr>
<tr class="even topAlign"><td class="tblName"><p><a href="qvideoprobe.html">QVideoProbe</a></p></td><td class="tblDescr"><p>Allows you to monitor video frames being played or recorded</p></td></tr>
<tr class="odd topAlign"><td class="tblName"><p><a href="qvideosurfaceformat.html">QVideoSurfaceFormat</a></p></td><td class="tblDescr"><p>Specifies the stream format of a video presentation surface</p></td></tr>
</table></div>
<a name="qt-multimedia-widgets-module"></a>
<h3 >Qt Multimedia Widgets Module</h3>
<div class="table"><table class="annotated">
<tr class="odd topAlign"><td class="tblName"><p><a href="qcameraviewfinder.html">QCameraViewfinder</a></p></td><td class="tblDescr"><p>Camera viewfinder widget</p></td></tr>
<tr class="even topAlign"><td class="tblName"><p><a href="qgraphicsvideoitem.html">QGraphicsVideoItem</a></p></td><td class="tblDescr"><p>Graphics item which display video produced by a QMediaObject</p></td></tr>
<tr class="odd topAlign"><td class="tblName"><p><a href="qvideowidget.html">QVideoWidget</a></p></td><td class="tblDescr"><p>Widget which presents video produced by a media object</p></td></tr>
<tr class="even topAlign"><td class="tblName"><p><a href="qvideowidgetcontrol.html">QVideoWidgetControl</a></p></td><td class="tblDescr"><p>Media control which implements a video widget</p></td></tr>
</table></div>
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