QMediaStreamsControl ¶

详细描述 ¶

QMediaStreamsControl class provides descriptions of the available media streams and allows individual streams to be activated and deactivated.

The interface name of QMediaStreamsControl is org.qt-project.qt.mediastreamscontrol/5.0 作为定义在 QMediaStreamsControl_iid .

另请参阅

requestControl()

class QMediaStreamsControl ( [ parent=None ] ) ¶

param parent

QObject

Constructs a new media streams control with the given parent .

PySide2.QtMultimedia.QMediaStreamsControl. StreamType ¶

Media stream type.

常量	描述
QMediaStreamsControl.AudioStream	Audio stream.
QMediaStreamsControl.VideoStream	Video stream.
QMediaStreamsControl.SubPictureStream	Subpicture or teletext stream.
QMediaStreamsControl.UnknownStream	The stream type is unknown.
QMediaStreamsControl.DataStream

PySide2.QtMultimedia.QMediaStreamsControl. activeStreamsChanged ( ) ¶

PySide2.QtMultimedia.QMediaStreamsControl. isActive ( streamNumber ) ¶

参数

streamNumber – int

返回类型

bool

Returns true if the media stream streamNumber is active.

PySide2.QtMultimedia.QMediaStreamsControl. metaData ( streamNumber , key ) ¶

参数

• streamNumber – int

• key – unicode

返回类型

object

Returns the meta-data value of key 为给定 streamNumber .

Useful metadata keys are QMediaMetaData::Title, QMediaMetaData::Description and QMediaMetaData::Language.

PySide2.QtMultimedia.QMediaStreamsControl. setActive ( streamNumber , state ) ¶

参数

• streamNumber – int

• state – bool

Sets the active state of media stream streamNumber .

Setting the active state of a media stream to true will activate it. If any other stream of the same type was previously active it will be deactivated. Setting the active state fo a media stream to false will deactivate it.

另请参阅

isActive()

PySide2.QtMultimedia.QMediaStreamsControl. streamCount ( ) ¶

返回类型

int

Returns the number of media streams.

PySide2.QtMultimedia.QMediaStreamsControl. streamType ( streamNumber ) ¶

参数

streamNumber – int

返回类型

StreamType

Return the type of media stream streamNumber .

PySide2.QtMultimedia.QMediaStreamsControl. streamsChanged ( ) ¶