Unable to get Video feed from D-Link DCS 932L using openCv

Question

I am trying to display video feed from IP- Camera(D-Link DCS 932L). I Have gone through topics for the same and tried the code from different posts, but am unable to get the video feed from the camera. Here's the code which i tried.

#include <opencv/cv.h>
#include <opencv/highgui.h>
using namespace cv;

int main(int argc, char *argv[])
{
Mat frame;
namedWindow("video", 1);
String url = "http://admin:admin@172.32.20.55:80/image/jpeg.cgi";
VideoCapture cap(url);
/*   VideoCapture cap(0);*/
while ( cap.isOpened() )
{
    cap >> frame;
    if(frame.empty()) break;

    imshow("video", frame);
    if(waitKey(30) >= 0) break;
}

return 0;

}

I tried many different kind of url's but i was unable to display any video feed. I thought it might be code problem so I even tried displaying the USB Webcam and it worked. So now i come to conclusion that the problem seems to be with URL which am passing. Heres the list of urls which I tried. I got this Url options from iSpy.Here are those URL's

(JPEG)http://admin:admin@172.32.20.55:80?IMAGE.JPG
(JPEG)http://admin:admin@172.32.20.55:80/image/jpeg.cgi
(MPEG)http://admin:admin172.32.20.55:80/video.cgi?resolution=VGA
(MPEG)http://admin:admin172.32.20.55:80/video/mjpg.cgi
(MPEG)http://admin:admin172.32.20.55:80/mjpeg.cgi?        user=admin&password=admin&channel=0
(MPEG)http://admin:pnqadmin172.32.20.55:80/VIDEO.CGI

Please let me know what can be probable problem for displaying the video feed. Is their something to do with the setting of the OpenCv or something else.Please note that am using VS2010 and C++ Need help of all the Expert out their. Thanks in advance.

try : `http://172.32.20.55:80/video/mjpg.cgi?dummy=.mjpg` (i.e help the capture resolve the mjpg format) also what's the admin:admin supposed to do ? — berak, Dec 16 '13 at 12:13
Got an message on CMD `warning: Error opening file <../../modules/highgui/src/cap_ffmpeg_impl.hpp:529>`. Can you please tell me what is the problem. — Mayur, Dec 16 '13 at 12:23
@MartinJames: Yes those are not actual username/passwords. Sorry I forgot to mention that. — Mayur, Dec 16 '13 at 12:25
@can you please check out the error message which I got on cmd, and can you please tell me what is the error for. — Mayur, Dec 16 '13 at 12:43

score 2 · Accepted Answer · answered Mar 30 '14 at 07:43

2

I solved my problem. The problem was with URL. I changed the URL and it worked smooth..! The URL i used was as follows.

"http://USER:PWD@IPADDRESS:8088/mjpeg.cgi?user=USERNAME&password=PWD&channel=0&.mjpg";

answered Mar 30 '14 at 07:43

Mayur

789
10
37

score 0 · Answer 2 · edited May 23 '17 at 11:51

0

I keep getting the same error:

warning: Error opening file <../../modules/highgui/src/cap_ffmpeg_impl.hpp:529>

I was trying to stream MJPG video from a Foscam IP camera. The URL opened just fine but I couldn't read any frames. May be there was some problem with the video codec.

Here's a hack written in Python that worked for me: https://stackoverflow.com/a/18411168/3183051

edited May 23 '17 at 11:51

Community

1
1

answered Jan 10 '14 at 18:48

ericman314

41
3

score 0 · Answer 3 · answered Mar 01 '14 at 12:13

0

Perhaps my answer is too late. Check if opencv_ffmpegXXX.dll or opencv_ffmpegXXX_64.dll (if you are building 64bit executable) is in the same folder where your executable is. Replace XXX with the number of opencv version you use.

answered Mar 01 '14 at 12:13

tmp

1

Unable to get Video feed from D-Link DCS 932L using openCv

3 Answers3

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