You can create two different streams, one for each camera, and show them simultaneously in two <video> tags. The list of available devices is available using navigator.mediaDevices.enumerateDevices(). After filtering the resulting list for only videoinputs, you have access to the deviceIds without needing permission from the user. With getUserMedia you can then request a stream … Read more
Ok, still no clear, definitive answers, so I went on and took a little action. The WHATWG would probably have an answer for me, so I decided to contact someone there. Didn’t really know who it had to be, but fellow Dutchman Anne van Kesteren usually seems to know the Web’s future pretty well – … Read more
Chrome is requiring secure origins (HTTPS) for getUserMedia. Starting with Chrome 47, getUserMedia() requests are only allowed from secure origins: HTTPS or localhost. https://developers.google.com/web/updates/2015/10/chrome-47-webrtc?hl=en
I had the same warning. Just modify the line camera = cv.VideoCapture(camera_port) to camera = cv.VideoCapture(camera_port, cv.CAP_DSHOW)
An update to show how to do it in the recent versions of OpenCV: import cv2 cv2.namedWindow(“preview”) vc = cv2.VideoCapture(0) if vc.isOpened(): # try to get the first frame rval, frame = vc.read() else: rval = False while rval: cv2.imshow(“preview”, frame) rval, frame = vc.read() key = cv2.waitKey(20) if key == 27: # exit on … Read more
You can use the following bash command: v4l2-ctl –list-devices In order to use the above command, you must install package v4l-utils before. In Ubuntu/Debian you can use the command: sudo apt-get install v4l-utils
I’m using openCV 1.1pre1 under Windows (videoinput library is used by default by this version of openCv under windows). With these instructions I can set camera resolution. Note that I call the old cvCreateCameraCapture instead of cvCaptureFromCam. capture = cvCreateCameraCapture(cameraIndex); cvSetCaptureProperty( capture, CV_CAP_PROP_FRAME_WIDTH, 640 ); cvSetCaptureProperty( capture, CV_CAP_PROP_FRAME_HEIGHT, 480 ); videoFrame = cvQueryFrame(capture); I’ve tested … Read more
If you want a “capture/streamer in a box” component, there are several out there as others have mentioned. If you want to get down to the low-level control over it all, you’ll need to use DirectShow as thealliedhacker points out. The best way to use DirectShow in C# is through the DirectShow.Net library – it … Read more
This JavaCV implementation works fine. Code: import org.bytedeco.javacv.*; import org.bytedeco.opencv.opencv_core.IplImage; import java.io.File; import static org.bytedeco.opencv.global.opencv_core.cvFlip; import static org.bytedeco.opencv.helper.opencv_imgcodecs.cvSaveImage; public class Test implements Runnable { final int INTERVAL = 100;///you may use interval CanvasFrame canvas = new CanvasFrame(“Web Cam”); public Test() { canvas.setDefaultCloseOperation(javax.swing.JFrame.EXIT_ON_CLOSE); } public void run() { new File(“images”).mkdir(); FrameGrabber grabber = new OpenCVFrameGrabber(0); // … Read more
I met the same problem. The error info of “ImportError: No module named vidcap” indicates that python interpreter didn’t find the vidcap module on you machine. so you’d better follow these steps. Download the vidcap from http://videocapture.sourceforge.net/ 2.Then copy the corresponding version of dll (which named “vidcap.pyd” in VideoCapture-0.9-5\VideoCapture-0.9-5\Python27\DLLs) to “your python path”\DLLs\ . 3.restart … Read more