我需要帮助来检测JavaFX中的运动。仅在检测到运动时开始记录，并且在某段时间没有检测到运动时停止记录。 一切正常，但运动检测部分效果不佳。
我使用了sarxos库：https://github.com/sarxos/webcam-capture
有任何建议吗？
这是javafx控制器类。
public class MonitorController implements Initializable {
private static double v;
@FXML
private VBox monitor;
@FXML
JFXButton btnStartCamera, btnStopCamera;
@FXML
JFXComboBox<WebCamInfo> cbCameraOptions;
@FXML
BorderPane bpWebCamPaneHolder;
@FXML
FlowPane fpBottomPane;
@FXML
ImageView imgWebCamCapturedImage;
int i = 0;
@FXML
private JFXSlider jfxSlider;
private BufferedImage grabbedImage, grabbedImage2;
private boolean stopCamera = false, stopCamera2 = false;
private Webcam selWebCam = null;
private ObjectProperty<Image> imageProperty = new SimpleObjectProperty<Image>();
private IMediaWriter writer, writer2;
private String cameraListPromptText = "Choose Camera";
private File file = null, file2 = null;
private SimpleDateFormat dateFormat = new SimpleDateFormat("dd-MMM-yyyy hh-mm-ss aa");
@Override
public void initialize(URL arg0, ResourceBundle arg1) {
fpBottomPane.setDisable(true);
ObservableList<WebCamInfo> options = FXCollections.observableArrayList();
int webCamCounter = 0;
for (Webcam webcam : Webcam.getWebcams()) {
WebCamInfo webCamInfo = new WebCamInfo();
webCamInfo.setWebCamIndex(webCamCounter);
webCamInfo.setWebCamName(webcam.getName());
options.add(webCamInfo);
webCamCounter++;
}
cbCameraOptions.setItems(options);
cbCameraOptions.setPromptText(cameraListPromptText);
cbCameraOptions.getSelectionModel().selectedItemProperty().addListener((arg01, arg11, arg2) -> {
if (arg2 != null) {
System.out.println("WebCam Index: " + arg2.getWebCamIndex() + ": WebCam Name:" + arg2.getWebCamName());
initializeWebCam(arg2.getWebCamIndex());
}
});
}
protected void setImageViewSize() {
double height = bpWebCamPaneHolder.getHeight();
double width = bpWebCamPaneHolder.getWidth();
imgWebCamCapturedImage.setFitHeight(height);
imgWebCamCapturedImage.setFitWidth(width);
imgWebCamCapturedImage.setSmooth(true);
imgWebCamCapturedImage.setPreserveRatio(false);
}
private void initializeWebCam(final int webCamIndex) {
Task<Void> webCamIntilizer = new Task<Void>() {
@Override
protected Void call() throws Exception {
if (selWebCam == null) {
selWebCam = Webcam.getWebcams().get(webCamIndex);
selWebCam.open();
} else {
closeCamera();
selWebCam = Webcam.getWebcams().get(webCamIndex);
selWebCam.open();
}
startWebCamStream();
return null;
}
};
new Thread(webCamIntilizer).start();
fpBottomPane.setDisable(false);
btnStartCamera.setDisable(true);
}
//main method that will record the videos
private synchronized void startWebCamStream() {
stopCamera = false;
stopCamera2 = false;
Date date = new Date();
File folder = new File("VideoRecordings");
//without motion detection video
Task<Void> task = new Task<Void>() {
@Override
protected Void call() throws Exception {
file = new File(folder,"NormalVideo("+dateFormat.format(date.getTime())+").mp4");
writer = ToolFactory.makeWriter(file.getName());
Dimension size = WebcamResolution.QVGA.getSize();
writer.addVideoStream(0, 0, ICodec.ID.CODEC_ID_H264, size.width, size.height);
long start = System.currentTimeMillis();
try {
while (!stopCamera) {
if ((grabbedImage = selWebCam.getImage()) != null) {
Platform.runLater(() -> {
final Image mainiamge = SwingFXUtils.toFXImage(grabbedImage, null);
imageProperty.set(mainiamge);
});
BufferedImage image = ConverterFactory.convertToType(grabbedImage, BufferedImage.TYPE_3BYTE_BGR);
IConverter converter = ConverterFactory.createConverter(image, IPixelFormat.Type.YUV420P);
IVideoPicture frame = converter.toPicture(image, ((System.currentTimeMillis() - start) * 1000));
frame.setKeyFrame(true);
frame.setQuality(0);
writer.encodeVideo(0,frame);
}
// grabbedImage.flush();
}
} catch (Exception e) {
} finally {
}
return null;
}
};
//display video and pictures
imgWebCamCapturedImage.imageProperty().bind(imageProperty);
//with motion detection video
Task<Void> task1 = new Task<Void>() {
@Override
protected Void call() throws Exception {
WebcamMotionDetector detector = new WebcamMotionDetector(selWebCam);
detector.setInterval(100);
jfxSlider.valueProperty().addListener((observable, oldValue, newValue) -> {
v = (double) newValue;
detector.setPixelThreshold((int) v);
});
detector.start();
file2 = new File(folder,"motionDetected("+dateFormat.format(date.getTime())+").mp4");
writer2 = ToolFactory.makeWriter(file2.getName());
Dimension size = WebcamResolution.QVGA.getSize();
writer2.addVideoStream(0, 0, ICodec.ID.CODEC_ID_H264, size.width, size.height);
long start = System.currentTimeMillis();
while (!stopCamera2) {
if ((grabbedImage2 = selWebCam.getImage()) != null) {
if(detector.isMotion()){
while (detector.isMotion()) {
BufferedImage image = ConverterFactory.convertToType(grabbedImage2, BufferedImage.TYPE_3BYTE_BGR);
IConverter converter = ConverterFactory.createConverter(image, IPixelFormat.Type.YUV420P);
IVideoPicture frame = converter.toPicture(image, ((System.currentTimeMillis() - start) * 1000));
frame.setKeyFrame(true);
frame.setQuality(0);
writer2.encodeVideo(0, frame);
}
grabbedImage2.flush();
// writer2.close();
}
}
}
return null;
}
};
Thread th = new Thread(task);
Thread th2 = new Thread(task1);
th.setDaemon(true);
th.start();
th2.setDaemon(true);
th2.start();
}
private void closeCamera() {
if (selWebCam != null) {
selWebCam.close();
}
}
@FXML
private void stopCamera(ActionEvent event) {
stopCameraAndRecording();
btnStopCamera.setDisable(true);
btnStartCamera.setDisable(false);
}
@FXML
private void startCamera(ActionEvent event) {
if(selWebCam.close()){
}else{
startWebCamStream();
btnStopCamera.setDisable(false);
btnStartCamera.setDisable(true);
}
}
class WebCamInfo {
private String webCamName;
private int webCamIndex;
public String getWebCamName() {
return webCamName;
}
public void setWebCamName(String webCamName) {
this.webCamName = webCamName;
}
public int getWebCamIndex() {
return webCamIndex;
}
public void setWebCamIndex(int webCamIndex) {
this.webCamIndex = webCamIndex;
}
@Override
public String toString() {
return webCamName;
}
}
private void stopCameraAndRecording(){
stopCamera = true;
stopCamera2 = true;
if (writer2!=null && writer2.isOpen()) {
writer2.close();
}
if (writer!=null && writer.isOpen()) {
writer.close();
}
closeCamera();
Webcam.shutdown();
}
}