任何人都可以在Java的开放式简历中使用IP摄像机。我使用了下面的代码，该代码对于网络摄像头效果很好。但是当我尝试使用网络摄像机时却无法正常工作
import java.io.ByteArrayInputStream;
import java.io.InputStream;
import java.nio.ByteBuffer;
import javax.imageio.ImageIO;
import org.opencv.core.Core;
import org.opencv.core.Mat;
import org.opencv.core.MatOfByte;
import org.opencv.core.MatOfRect;
import org.opencv.core.Point;
import org.opencv.core.Rect;
import org.opencv.core.Scalar;
import org.opencv.imgcodecs.Imgcodecs;
import org.opencv.imgproc.Imgproc;
import org.opencv.objdetect.CascadeClassifier;
import org.opencv.videoio.VideoCapture;
import com.amazonaws.services.rekognition.model.Image;
import com.amazonaws.util.IOUtils;
import com.wso2telco.rnd.ui.DashBoard;
import com.wso2telco.rnd.ui.UI;
public class TestIPCamera {
private static final long SLEEP_TIME = 1000;
private static VideoCapture camera;
private static FaceComparer comparer;
private static UI ui;
private static DashBoard dashUi;
public static void main(String args[]) {
comparer = new FaceComparer();
System.loadLibrary(Core.NATIVE_LIBRARY_NAME);
//nu.pattern.OpenCV.loadLocally();
System.loadLibrary("opencv_java320");
camera = new VideoCapture();
camera.open("http://192.168.1.2:8080/video?video=x.mpjeg");
System.out.println(camera.isOpened());
while(!camera.isOpened()) {
try {
Thread.sleep(100);
} catch (InterruptedException e) {
e.printStackTrace();
}
}
if (!camera.isOpened()) {
System.out.println("Camera Error");
} else {
System.out.println("Camera Ready");
ui = new UI();
dashUi = new DashBoard();
}
while(true){
runImage();
}
}
我尝试了其他主题中给出的许多建议，但找不到该问题的具体答案。
答案 0 :(得分：0)
尝试了其他选项之后，最后我通过安装Open CV 3.4.1版本解决了该问题。
当您安装open cv时，它会显示如下输出。在那里，您可以检查 FFMPEG：是否表示为 NO 。此配置将停止使用代码中的IP摄像机的代码。为避免这种错误配置，您需要使用 -D WITH_FFMPEG = ON .. 安装Open CV以解决此问题
-- OpenCV modules:
-- To be built: core flann hdf imgproc ml objdetect phase_unwrapping photo plot reg surface_matching video xphoto bgsegm dnn face freetype fuzzy img_hash imgcodecs shape videoio xobjdetect highgui superres ts bioinspired dpm features2d line_descriptor saliency text calib3d ccalib datasets rgbd stereo structured_light tracking videostab xfeatures2d ximgproc aruco java optflow stitching python3
-- Disabled: world contrib_world
-- Disabled by dependency: -
-- Unavailable: cudaarithm cudabgsegm cudacodec cudafeatures2d cudafilters cudaimgproc cudalegacy cudaobjdetect cudaoptflow cudastereo cudawarping cudev python2 viz cnn_3dobj cvv dnn_modern matlab sfm
--
-- GUI:
-- QT: NO
-- GTK+ 3.x: YES (ver 3.20.9)
-- GThread : YES (ver 2.50.2)
-- GtkGlExt: NO
-- OpenGL support: NO
-- VTK support: NO
--
-- Media I/O:
-- ZLib: /usr/lib/x86_64-linux-gnu/libz.so (ver 1.2.8)
-- JPEG: /usr/lib/x86_64-linux-gnu/libjpeg.so (ver )
-- WEBP: build (ver encoder: 0x020e)
-- PNG: /usr/lib/x86_64-linux-gnu/libpng.so (ver 1.6.25)
-- TIFF: /usr/lib/x86_64-linux-gnu/libtiff.so (ver 42 - 4.0.6)
-- JPEG 2000: /usr/lib/x86_64-linux-gnu/libjasper.so (ver 1.900.1)
-- OpenEXR: /usr/lib/x86_64-linux-gnu/libImath.so /usr/lib/x86_64-linux-gnu/libIlmImf.so /usr/lib/x86_64-linux-gnu/libIex.so /usr/lib/x86_64-linux-gnu/libHalf.so /usr/lib/x86_64-linux-gnu/libIlmThread.so (ver 2.2.0)
-- GDAL: NO
-- GDCM: NO
--
-- Video I/O:
-- DC1394 1.x: NO
-- DC1394 2.x: YES (ver 2.2.4)
-- FFMPEG: NO
-- avcodec: NO
-- avformat: NO
-- avutil: NO
-- swscale: NO
-- avresample: NO
-- GStreamer: NO
-- OpenNI: NO
-- OpenNI PrimeSensor Modules: NO
-- OpenNI2: NO
-- PvAPI: NO
-- GigEVisionSDK: NO
-- Aravis SDK: NO
-- UniCap: NO
-- UniCap ucil: NO
-- V4L/V4L2: NO/YES
-- XIMEA: NO
-- Xine: NO
-- Intel Media SDK: NO
-- gPhoto2: NO
--
-- Parallel framework: TBB (ver 4.4 interface 9005)
--
-- Trace: YES (with Intel ITT)
--
-- Other third-party libraries:
-- Use Intel IPP: 2017.0.2 [2017.0.2]
-- at: /home/hao/opencv-3.3.0/build/3rdparty/ippicv/ippicv_lnx
-- Use Intel IPP IW: prebuilt binaries (2017.0.2)
-- Use Intel IPP Async: NO
-- Use VA: NO
-- Use Intel VA-API/OpenCL: NO
-- Use Lapack: NO
-- Use Eigen: YES (ver 3.3.4)
-- Use Cuda: NO
-- Use OpenCL: YES
-- Use OpenVX: NO
-- Use custom HAL: NO
--
-- OpenCL: <Dynamic loading of OpenCL library>
-- Include path: /home/hao/opencv-3.3.0/3rdparty/include/opencl/1.2
-- Use AMDFFT: NO
-- Use AMDBLAS: NO
--
-- Python 2:
-- Interpreter: (ver 2.7.12)
--
-- Python 3:
-- Interpreter: /usr/bin/python3 (ver 3.5.2)
-- Libraries: /usr/lib/x86_64-linux-gnu/libpython3.5m.so (ver 3.5.2+)
-- numpy: /usr/local/lib/python3.5/dist-packages/numpy/core/include (ver 1.12.0)
-- packages path: lib/python3.5/dist-packages
--
-- Python (for build):
--
-- Java:
-- ant: /usr/bin/ant (ver 1.9.7)
-- JNI: /usr/lib/jvm/default-java/include /usr/lib/jvm/default-java/include/linux /usr/lib/jvm/default-java/include
-- Java wrappers: YES
-- Java tests: YES
--
-- Matlab: Matlab not found or implicitly disabled
--
-- Documentation:
-- Doxygen: NO
--
-- Tests and samples:
-- Tests: YES
-- Performance tests: YES
-- C/C++ Examples: YES
--
-- Install path: /usr/local
--
-- cvconfig.h is in: /home/hao/opencv-3.3.0/build
--