QVideoEncoderSettingsControl Class
The QVideoEncoderSettingsControl class provides access to the settings of a media service that performs video encoding. 更多...
| 头文件: | #include <QVideoEncoderSettingsControl> |
| qmake: | QT += multimedia |
| 基类: | QMediaControl |
公有函数
| virtual | ~QVideoEncoderSettingsControl() |
| virtual void | setVideoSettings(const QVideoEncoderSettings &settings) = 0 |
| virtual QList<qreal> | supportedFrameRates(const QVideoEncoderSettings &settings, bool *continuous = Q_NULLPTR) const = 0 |
| virtual QList<QSize> | supportedResolutions(const QVideoEncoderSettings &settings, bool *continuous = Q_NULLPTR) const = 0 |
| virtual QStringList | supportedVideoCodecs() const = 0 |
| virtual QString | videoCodecDescription(const QString &codec) const = 0 |
| virtual QVideoEncoderSettings | videoSettings() const = 0 |
- 32 个公有函数继承自 QObject
受保护的函数
| QVideoEncoderSettingsControl(QObject *parent = Q_NULLPTR) |
- 9 个受保护的函数继承自 QObject
Macros
其他继承的成员
- 1 个属性继承自 QObject
- 1 个公有槽函数继承自 QObject
- 2 个信号继承自 QObject
- 1 个公有变量继承自 QObject
- 10 个静态公有成员继承自 QObject
- 2 个受保护的变量继承自 QObject
详细描述
The QVideoEncoderSettingsControl class provides access to the settings of a media service that performs video encoding.
If a QMediaService supports encoding video data it will implement QVideoEncoderSettingsControl. This control provides information about the limits of restricted video encoder options and allows the selection of a set of video encoder settings as specified in a QVideoEncoderSettings object.
The functionality provided by this control is exposed to application code through the QMediaRecorder class.
The interface name of QVideoEncoderSettingsControl is org.qt-project.qt.videoencodersettingscontrol/5.0 as defined in QVideoEncoderSettingsControl_iid.
参见 QMediaRecorder, QVideoEncoderSettings, and QMediaService::requestControl().
成员函数
[protected] QVideoEncoderSettingsControl::QVideoEncoderSettingsControl(QObject *parent = Q_NULLPTR)
Create a new video encoder settings control object with the given parent.
[virtual] QVideoEncoderSettingsControl::~QVideoEncoderSettingsControl()
Destroys a video encoder settings control.
[pure virtual] void QVideoEncoderSettingsControl::setVideoSettings(const QVideoEncoderSettings &settings)
Sets the selected video encoder settings.
参见 videoSettings().
[pure virtual] QList<qreal> QVideoEncoderSettingsControl::supportedFrameRates(const QVideoEncoderSettings &settings, bool *continuous = Q_NULLPTR) const
Returns a list of supported frame rates.
If non null video settings parameter is passed, the returned list is reduced to frame rates supported with partial settings like video codec or video resolution applied.
If the encoder supports arbitrary frame rates within the supported range, *continuous is set to true, otherwise *continuous is set to false.
参见 QVideoEncoderSettings::frameRate().
[pure virtual] QList<QSize> QVideoEncoderSettingsControl::supportedResolutions(const QVideoEncoderSettings &settings, bool *continuous = Q_NULLPTR) const
Returns a list of supported resolutions.
If non null video settings parameter is passed, the returned list is reduced to resolution supported with partial settings like video codec or frame rate applied.
If the encoder supports arbitrary resolutions within the supported resolutions range, *continuous is set to true, otherwise *continuous is set to false.
参见 QVideoEncoderSettings::resolution().
[pure virtual] QStringList QVideoEncoderSettingsControl::supportedVideoCodecs() const
Returns the list of supported video codecs.
[pure virtual] QString QVideoEncoderSettingsControl::videoCodecDescription(const QString &codec) const
Returns a description of a video codec.
[pure virtual] QVideoEncoderSettings QVideoEncoderSettingsControl::videoSettings() const
Returns the video encoder settings.
The returned value may be different tha passed to QVideoEncoderSettingsControl::setVideoSettings() if the settings contains the default or undefined parameters. In this case if the undefined parameters are already resolved, they should be returned.
参见 setVideoSettings().
宏
QVideoEncoderSettingsControl_iid
org.qt-project.qt.videoencodersettingscontrol/5.0
Defines the interface name of the QVideoEncoderSettingsControl class.