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 |
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 |
void | subtitleTextChanged (const QString & subtitleText ) const |
void | videoFrameChanged (const QVideoFrame & frame ) const |
void | videoSizeChanged () |
QVideoSink 类可以用于从 Qt Multimedia 逐帧检索视频数据。
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 可以绘制使用 paint() 方法在 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 .
返回当前字幕文本。
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 () |
构造新的 QVideoSink 对象采用 parent .
[virtual noexcept]
QVideoSink::
~QVideoSink
()
销毁对象。
返回 QRhi instance being used to create texture data in the video frames.
设置当前 subtitle 文本。
注意: setter 函数对于特性 subtitleText .
另请参阅 subtitleText ().
设置当前视频 frame .
另请参阅 videoFrame ().
返回当前视频帧。
另请参阅 setVideoFrame ().
[signal]
void
QVideoSink::
videoFrameChanged
(const
QVideoFrame
&
frame
) const
Signals when the video frame 改变。