QVideoSink Class

The QVideoSink class represents a generic sink for video data. 更多...

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

所有成員列錶，包括繼承成員

特性

subtitleText : QString
videoSize : const QSize

公共函數

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

信號

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

詳細描述

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 () 信號。

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.

另請參閱 QMediaPlayer and QMediaCaptureSession .

特性文檔編製

subtitleText : QString

Returns the current subtitle text.

訪問函數：

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

通知程序信號：

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.

訪問函數：

QSize

videoSize () const

通知程序信號：

void	videoSizeChanged ()

成員函數文檔編製

QVideoSink:: QVideoSink ( QObject * parent = nullptr)

Constructs a new QVideoSink object with parent .

`[虛擬]` QVideoSink:: ~QVideoSink ()

銷毀對象。

void QVideoSink:: setSubtitleText (const QString & subtitle )

設置當前 subtitle 文本。

注意： setter 函數對於特性 subtitleText .

另請參閱 subtitleText ().

void QVideoSink:: setVideoFrame (const QVideoFrame & frame )

Sets the current video frame .

另請參閱 videoFrame ().

QVideoFrame QVideoSink:: videoFrame () const

Returns the current video frame.

另請參閱 setVideoFrame ().

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

Signals when the video frame 改變。