在 Java 中使用 OpenCV 3.1 捕获 rtsp 视频流
Capture rtsp video stream using OpenCV 3.1 in Java
我正在尝试在 java 中创建一个应用程序,使用 OpenCV 从 Web 服务中获取视频流,这是一个带有几个摄像头和一个录制设备的摄像头系统。
我找到了访问通道 1 上的摄像头的地址 "rtsp://login:pass@IP address:Port/cam/realmonitor?channel=1&subtype=0"。
为了打开摄像头流,我使用了这段代码(目前它捕获了一个本地 usb 摄像头):
VideoCapture 上限;
Mat2Image mat2Img = new 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?");
}
}
抓取视频流后,我将其放入 JFrame。
我想我应该把视频流服务地址放在 cap.open( ... ) 但使用 rtsp://login:pass@http://192.168.1.14:8006/cam/realmonitor?channel=1&subtype=0 给了我 "Exception in thread "AWT- EventQueue-0" java.lang.IllegalArgumentException: 宽度 (0) 和高度 (0) 必须 > 0"。
请帮忙,
编辑
我发现 rtsp://login:pass@http://192.168.1.14:554/cam/realmonitor?channel=1&subtype=0 在 vlc 中有效,但在 opencv 中仍然没有运气.
编辑#2
行。在玩过 vlcl、gstreamer 和大多数流行的解决方案之后,它才开始工作。我不知道这毕竟不是坏的 rtsp 地址。代码:
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?");
}
}
回答我的问题和 Fouad 我 post 工作代码:
我猜答案是加载 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");
}
}
}
我正在尝试在 java 中创建一个应用程序,使用 OpenCV 从 Web 服务中获取视频流,这是一个带有几个摄像头和一个录制设备的摄像头系统。
我找到了访问通道 1 上的摄像头的地址 "rtsp://login:pass@IP address:Port/cam/realmonitor?channel=1&subtype=0"。
为了打开摄像头流,我使用了这段代码(目前它捕获了一个本地 usb 摄像头):
VideoCapture 上限; Mat2Image mat2Img = new 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?");
}
}
抓取视频流后,我将其放入 JFrame。
我想我应该把视频流服务地址放在 cap.open( ... ) 但使用 rtsp://login:pass@http://192.168.1.14:8006/cam/realmonitor?channel=1&subtype=0 给了我 "Exception in thread "AWT- EventQueue-0" java.lang.IllegalArgumentException: 宽度 (0) 和高度 (0) 必须 > 0"。
请帮忙,
编辑 我发现 rtsp://login:pass@http://192.168.1.14:554/cam/realmonitor?channel=1&subtype=0 在 vlc 中有效,但在 opencv 中仍然没有运气.
编辑#2 行。在玩过 vlcl、gstreamer 和大多数流行的解决方案之后,它才开始工作。我不知道这毕竟不是坏的 rtsp 地址。代码:
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?");
}
}
回答我的问题和 Fouad 我 post 工作代码: 我猜答案是加载 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");
}
}
}