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!7 lib 1008985 // webcam lib 1008987 // bridj lib 1004016 // slf4j api import com.github.sarxos.webcam.Webcam; /** * @author Bartosz Firyn (SarXos) */ p { List webcams = Webcam.getWebcams(); // NOTE! /* * Yes, I know we could do this in one loop, but I wanted to prove here * that it's possible to have many native webcams open in the same time. * I tested this example with 4 webcams simultaneously connected to the * USB bus - 1 x PC embedded device, and 3 x UVC devices connected to * the USB concentration hub, which was connected to the USB 2.0 port. * It's working like a charm. */ // USB BANDWIDTH! /* * As you probably know the USB has limited bandwidth and therefore it * may not be possible to transfer images from as many cameras as you * would like to wish. This example works when I'm using QQVGA (176x144) * but fails with the error message when I want to fetch VGA (640x480). */ // open all at once (this is the most time-consuming operation, all // others are executed instantly) for (Webcam webcam : webcams) { System.out.format("Opening %s\n", webcam.getName()); webcam.open(); } new L> images; // capture picture from all of them for (int i = 0; i < webcams.size(); i++) pcall { Webcam webcam = webcams.get(i); S name = webcam.getName(); System.out.format("Capturing %s\n", name); images.add(pair(name, webcam.getImage())); } // close all for (Webcam webcam : webcams) { System.out.format("Closing %s\n", webcam.getName()); webcam.close(); } for (Pair p : images) showImage(p.a, p.b); }