QVideoSink 类

QVideoSink 类表示视频数据的一般汇点。更多...

头：	#include <QVideoSink>
CMake:	find_package(Qt6 REQUIRED COMPONENTS Multimedia) target_link_libraries(mytarget PRIVATE Qt6::Multimedia)
qmake:	QT += multimedia
继承：	QObject

所有成员列表，包括继承成员

特性

subtitleText : QString
videoSize : const QSize

公共函数

	QVideoSink (QObject * parent = nullptr)
virtual	~QVideoSink ()
QRhi *	rhi () const
void	setSubtitleText (const QString & subtitle )
void	setVideoFrame (const QVideoFrame & frame )
QString	subtitleText () const
QVideoFrame	videoFrame () const
QSize	videoSize () const

信号

void	subtitleTextChanged (const QString & subtitleText ) const
void	videoFrameChanged (const QVideoFrame & frame ) const
void	videoSizeChanged ()

详细描述

The QVideoSink class can be used to retrieve video data on a frame by frame basis from Qt Multimedia.

QVideoSink will provide individual video frames to the application developer through the videoFrameChanged () 信号。

The video frame can then be used to read out the data of those frames and handle them further. When using QPainter ， QVideoFrame can be drawing using the paint() method in QVideoSink.

QVideoFrame objects can consume a significant amount of memory or system resources and should thus not be held for longer than required by the application.

另请参阅 QMediaPlayer and QMediaCaptureSession .

特性文档编制

subtitleText : QString

Returns the current subtitle text.

访问函数：

QString	subtitleText () const
void	setSubtitleText (const QString & subtitle )

通知程序信号：

void	subtitleTextChanged (const QString & subtitleText ) const

`[read-only]` videoSize : const QSize

Returns the size of the video currently being played back. If no video is being played, this method returns an invalid size.

访问函数：

QSize videoSize () const

通知程序信号：

void	videoSizeChanged ()

成员函数文档编制

QVideoSink:: QVideoSink ( QObject * parent = nullptr)

构造新的 QVideoSink 对象采用 parent .

`[virtual noexcept]` QVideoSink:: ~QVideoSink ()

销毁对象。

QRhi *QVideoSink:: rhi () const

返回 QRhi instance being used to create texture data in the video frames.

void QVideoSink:: setSubtitleText (const QString & subtitle )

设置当前 subtitle text.

注意： Setter 函数对于特性 subtitleText .

另请参阅 subtitleText ().

void QVideoSink:: setVideoFrame (const QVideoFrame & frame )

设置当前视频 frame .

另请参阅 videoFrame ().

QVideoFrame QVideoSink:: videoFrame () const

Returns the current video frame.

另请参阅 setVideoFrame ().

`[signal]` void QVideoSink:: videoFrameChanged (const QVideoFrame & frame ) const

Signals when the video frame 改变。