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POc, opencv - accessing camera JPG image over ip
 

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    <p>I have read many, many threads about streaming images over IP in <strong>OpenCV 2.3.1</strong>, but I still cannot get my program to work.</p> <p>I downloaded <strong>IP Webcam for Android</strong> from <a href="https://market.android.com/details?id=com.pas.webcam&amp;hl=en" rel="noreferrer">https://market.android.com/details?id=com.pas.webcam&amp;hl=en</a>, and recently learned OpenCV to retrieve images from my Android phone camera.</p> <p>Its built-in manual said that the image from the phone camera can be located at <a href="http://the.phone.ip.address:8080/shot.jpg" rel="noreferrer">http://the.phone.ip.address:8080/shot.jpg</a>. I have opened it from browser several times and it always looks fine. I also built OpenCV manually, with <strong>FFmpeg</strong> support.</p> <p>So far I've tried</p> <pre><code>CvCapture* webcam = cvCaptureFromFile("http://192.168.1.220:8080/shot.jpg"); </code></pre> <p>but it returns NULL and outputs</p> <pre><code>[image2 @ 0xd701e0]Could not find codec parameters (Video: mjpeg, yuv420p) </code></pre> <p>I also tried replacing http with rtsp, but it still doesn't work. I also tried to replace the url with some other image url (one direct link to random image from Google Images, and one from localhost) and it always kills with a segfault.</p> <p>Here's my full source</p> <pre><code>#include &lt;stdlib.h&gt; #include &lt;stdio.h&gt; #include &lt;math.h&gt; #include &lt;cv.h&gt; #include &lt;highgui.h&gt; int main(int argc, char* argv[]) { CvCapture* webcam = cvCaptureFromFile("http://192.168.1.220:8080/shot.jpg"); if(!webcam) { fprintf(stderr, "cannot open webcam\n"); return 1; } IplImage* img = cvQueryFrame(webcam); if(!img) { fprintf(stderr, "cannot get image\n"); return 1; } cvNamedWindow("test", CV_WINDOW_AUTOSIZE); cvShowImage("test", img); cvWaitKey(0); cvReleaseImage(&amp;img); /**/ cvReleaseCapture(&amp;webcam); /**/ cvDestroyWindow("test"); return 0; } </code></pre> <p>Can OpenCV really read images over IP, or am I missing something?</p>
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    1. COdid you get your answer?
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    2. COI've tried `rtsp://192.168.1.104:8080/videofeed` but also failed.
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