我正在将gstreamer库用于一个Java项目,该项目需要能够从网络摄像头捕获图像。
我已经有了显示网络摄像头流的代码,只是无法弄清楚如何通过按下旁边的按钮来捕获图像。
我搜索了互联网,但只能找到显示流或捕获图像的代码片段,但没有一个同时说明两者......我试图合并这些代码片段,但这对我也不起作用。
我必须做什么才能让它工作?
public class WebcamPanel extends JPanel {
private static Pipeline pipe;
public WebcamPanel(){
String[] args = {};
args = Gst.init("Webcam", args);
pipe = new Pipeline("pipeline");
final Element videosrc = ElementFactory.make("dshowvideosrc", "source");
final Element videofilter = ElementFactory.make("capsfilter", "flt");
videofilter.setCaps(Caps.fromString("video/x-raw-yuv, width=320, height=240"));
setLayout(new GridBagLayout());
final GridBagConstraints c = new GridBagConstraints();
JButton takePic = new JButton();
takePic.setPreferredSize(new Dimension(50,50));
c.gridx = 0;
c.insets = new Insets(0,10,0,0);
add(takePic,c);
c.gridx = 2;
c.gridwidth = GridBagConstraints.REMAINDER;
c.insets = new Insets(0,40,0,0);
SwingUtilities.invokeLater(new Runnable() {
public void run() {
VideoComponent videoComponent = new VideoComponent();
Element videosink = videoComponent.getElement();
// This gives 2nd window with stream from webcam
// Element videosink = ElementFactory.make("xvimagesink", "sink");
pipe.addMany(videosrc, videofilter, videosink);
Element.linkMany(videosrc, videofilter, videosink);
videoComponent.setPreferredSize(new Dimension(320, 240));
add(videoComponent,c);
videoComponent.setVisible(true);
// Start the pipeline processing
pipe.setState(State.PLAYING);
}
});
}
}
你看过 camerabin2 吗?这将为您实现整个相机工作流程(取景器,图像捕获,视频捕获,效果等(。基本方法是启动第二个流并从中捕获选定的图像(例如,使用阀门!jpegenc!multifilesink并打开所选图像的阀门(,或者使用图像保存管道的输出选择器或使用缓冲区探针(hacky(。