A multimedia backend provides the glue between platform-specific libraries, and Qt Multimedia. In some cases the available cross-platform Multimedia APIs or implementations are not sufficient, or not immediately available on a certain platform. Alternatively, the multimedia implementation on a platform might expose certain extra properties or functionality that other platforms do not, or a finer degree of control might be possible. For these cases, it is possible to use extended controls directly.
| QAudioDecoderControl | 访问 QMediaService 音频解码功能 |
| QAudioEncoderSettingsControl | 访问履行音频编码媒体服务的设置 |
| QAudioInputSelectorControl | Audio input selector media control |
| QAudioOutputSelectorControl | Audio output selector media control |
| QAudioRoleControl | 控制媒体对象音频角色 |
| QCameraCaptureBufferFormatControl | Control for setting the capture buffer format |
| QCameraCaptureDestinationControl | Control for setting capture destination |
| QCameraControl | Abstract base class for classes that control still cameras or video cameras |
| QCameraExposureControl | 允许控制摄像头曝光参数 |
| QCameraFeedbackControl | Allows controlling feedback (sounds etc) during camera operation |
| QCameraFlashControl | Allows controlling a camera's flash |
| QCameraFocusControl | Supplies control for focusing related camera parameters |
| QCameraImageCaptureControl | Control interface for image capture services |
| QCameraImageProcessingControl | Abstract class for controlling image processing parameters, like white balance, contrast, saturation, sharpening and denoising |
| QCameraInfoControl | Camera info media control |
| QCameraLocksControl | Abstract base class for classes that control still cameras or video cameras |
| QCameraViewfinderSettingsControl | Abstract class for controlling camera viewfinder parameters |
| QCameraViewfinderSettingsControl2 | 访问摄像头媒体服务的取景器设置 |
| QCameraZoomControl | Supplies control for optical and digital camera zoom |
| QCustomAudioRoleControl | 控制媒体对象音频角色 |
| QImageEncoderControl | Access to the settings of a media service that performs image encoding |
| QMediaAudioProbeControl | 允许控制媒体对象探测音频数据 |
| QMediaAvailabilityControl | Supplies a control for reporting availability of a service |
| QMediaContainerControl | Access to the output container format of a QMediaService |
| QMediaControl | Base interface for media service controls |
| QMediaGaplessPlaybackControl | Access to the gapless playback related control of a QMediaService |
| QMediaNetworkAccessControl | Allows the setting of the Network Access Point for media related activities |
| QMediaPlayerControl | Access to the media playing functionality of a QMediaService |
| QMediaRecorderControl | 访问 QMediaService 录制功能 |
| QMediaService | Common base class for media service implementations |
| QMediaStreamsControl | Media stream selection control |
| QMediaVideoProbeControl | Allows control over probing video frames in media objects |
| QMetaDataReaderControl | Read access to the meta-data of a QMediaService's media |
| QMetaDataWriterControl | Write access to the meta-data of a QMediaService's media |
| QRadioDataControl | Access to the RDS functionality of the radio in the QMediaService |
| QRadioTunerControl | Access to the radio tuning functionality of a QMediaService |
| QVideoDeviceSelectorControl | Video device selector media control |
| QVideoEncoderSettingsControl | Access to the settings of a media service that performs video encoding |
| QVideoRendererControl | 把视频渲染到 QAbstractVideoSurface 的媒体控件 |
| QVideoWindowControl | 把视频渲染到窗口的媒体控件 |
