内容

• 公共函数
• 保护函数
• 宏
• 详细描述

QVideoEncoderSettingsControl Class

The QVideoEncoderSettingsControl class provides access to the settings of a media service that performs video encoding. 更多...

头：	#include <QVideoEncoderSettingsControl>
qmake:	QT += multimedia
继承：	QMediaControl

• 所有成员列表，包括继承成员

公共函数

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 公共函数继承自 QObject

保护函数

QVideoEncoderSettingsControl (QObject * parent = Q_NULLPTR)

• 9 保护函数继承自 QObject

宏

QVideoEncoderSettingsControl_iid

额外继承成员

• 1 特性继承自 QObject
• 1 公共槽继承自 QObject
• 2 信号继承自 QObject
• 11 静态公共成员继承自 QObject

详细描述

The QVideoEncoderSettingsControl class provides access to the settings of a media service that performs video encoding.

若 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 对象。

The functionality provided by this control is exposed to application code through the QMediaRecorder 类。

接口名称对于 QVideoEncoderSettingsControl is org.qt-project.qt.videoencodersettingscontrol/5.0 作为定义在 QVideoEncoderSettingsControl_iid .

另请参阅 QMediaRecorder , QVideoEncoderSettings ，和 QMediaService::requestControl ().

成员函数文档编制

[protected] QVideoEncoderSettingsControl:: QVideoEncoderSettingsControl ( QObject * parent = Q_NULLPTR)

Create a new video encoder settings control object with the given parent .

[虚拟] QVideoEncoderSettingsControl:: ~QVideoEncoderSettingsControl ()

Destroys a video encoder settings control.

[pure virtual] void QVideoEncoderSettingsControl:: setVideoSettings (const QVideoEncoderSettings & settings )

Sets the selected video encoder settings .

另请参阅 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 被设为 true，否则 * continuous 被设为 false。

另请参阅 QVideoEncoderSettings::frameRate ().

[pure virtual] QList < QSize > QVideoEncoderSettingsControl:: supportedResolutions (const QVideoEncoderSettings & settings , bool * continuous = Q_NULLPTR) const

返回支持的分辨率列表。

If non null video settings parameter is passed, the returned list is reduced to resolution supported with partial settings like video codec or 帧速率 applied.

若编码器支持所支持的分辨率范围内的任意分辨率，* continuous 被设为 true，否则 * continuous 被设为 false。

另请参阅 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.

返回值可能异于传递给 QVideoEncoderSettingsControl::setVideoSettings () 若设定包含默认 (或未定义) 参数。在此情况下，若已解析未定义参数，应返回它们。

另请参阅 setVideoSettings ().

宏文档编制

QVideoEncoderSettingsControl_iid

org.qt-project.qt.videoencodersettingscontrol/5.0

定义接口名为 QVideoEncoderSettingsControl 类。