[英]Capture rtsp video stream using OpenCV 3.1 in Java
我正在嘗試使用OpenCV在Java中創建一個應用程序,以從Web服務中獲取視頻流,該Web服務是具有幾個攝像機和一個記錄設備的攝像機系統。
我已經找到用於訪問通道1上的攝像機的地址“ rtsp:// login:pass @ IP地址:Port / cam / realmonitor?channel = 1&subtype = 0”。
為了打開攝像機流,我使用了以下代碼(當前它捕獲了本地USB攝像機):
VideoCapture帽; Mat2Image mat2Img =新的Mat2Image();
public VideoGrabber(){
cap = new VideoCapture(0);
try {
System.out.println("Sleeping..");
Thread.sleep(4000);
} catch (InterruptedException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
System.out.println("Camera on..");
cap.open("0");
if(!cap.isOpened()){
System.out.println("Camera Error");
}
else{
System.out.println("Camera OK?");
}
}
抓取視頻流后,我將其放入JFrame。
我想我應該將視頻流服務地址放在cap.open(...)中,但是使用rtsp:// login:pass @ http://192.168.1.14:8006/cam/realmonitor?channel=1&subtype=0給了我“線程“ AWT-EventQueue-0”中的異常java.lang.IllegalArgumentException:寬度(0)和高度(0)必須大於0”。
請幫忙,
編輯我已經發現,rtsp://形式登錄:通過@ http://192.168.1.14 :554 / CAM /內RealMonitor通道= 1亞型VLC = 0的作品,但仍然在OpenCV中沒有運氣。
編輯#2好。 在使用vlcl,gstreamer和大多數流行的解決方案后,它才開始工作。 我不知道這畢竟不是rtsp地址不好。 碼:
static {
System.loadLibrary(Core.NATIVE_LIBRARY_NAME);
//load the library of opencv
}
VideoCapture cap;
Mat2Image mat2Img = new Mat2Image();
Mat matFilter = new Mat();
public VideoGrabber(){
cap = new VideoCapture();
try {
System.out.println("Sleeping..");
Thread.sleep(1000);
} catch (InterruptedException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
System.out.println("Camera on..");
cap.open("rtsp://login:pass@192.168.1.14:554/cam/realmonitor?channel=1&subtype=0");
if(!cap.isOpened()){
System.out.println("Camera Error");
}
else{
System.out.println("Camera OK?");
}
}
回答我的問題,對於Fouad,我發布了工作代碼:我猜答案是加載ffmpeg dll。
//all the imports
public class App {
static {
String path = null;
try {
//I have copied dlls from opencv folder to my project folder
path = "E:\\JAVA Projects\\OpenCv\\RTSP Example\\libraries";
System.load(path+"\\opencv_java310.dll");
System.load(path+"\\opencv_ffmpeg310_64.dll");
} catch (UnsatisfiedLinkError e) {
System.out.println("Error loading libs");
}
}
public static void main(String[] args) {
App app = new App();
//Address can be different. Check your cameras manual. :554 a standard RTSP port for cameras but it can be different
String addressString = "rtsp://login:password@192.168.1.14:554/cam/realmonitor?channel=11&subtype=0";
Mat mat = new Mat();
VideoCapture capturedVideo = new VideoCapture();
boolean isOpened = capturedVideo.open(addressString);
app.openRTSP(isOpened, capturedVideo, mat);
}
public void openRTSP(boolean isOpened, VideoCapture capturedVideo, Mat cameraMat) {
if (isOpened) {
boolean tempBool = capturedVideo.read(cameraMat);
System.out.println("VideoCapture returned mat? "+tempBool);
if (!cameraMat.empty()) {
System.out.println("Print image size: "+cameraMat.size());
//processing image captured in cameraMat object
} else {
System.out.println("Mat is empty.");
}
} else {
System.out.println("Camera connection problem. Check addressString");
}
}
}
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