You'll need to grab the image from the camera using another library. Since I never owned an Ip camera, I cant point out one that will surely work... browsing the Axis official site, I found that they have an SDK (http://www.axis.com/techsup/cam_servers/dev/activex.htm)... hope its easy to use.

Once you are able to get the frames, you'll need to change the code of the facedetect example a bit:


Coment out the code where it opens a camera, or a video, since you won't be using highgui to grab frames:

#if 0  // We wont be using highgui to capture the frames

if( !input_name || (isdigit(input_name[0]) && input_name[1] == '\0') )
        capture = cvCaptureFromCAM( !input_name ? 0 : input_name[0] - '0' );
    else
        capture = cvCaptureFromAVI( input_name );

#endif



Then you'll need to change the 'if' where he checked if a cvCapture were successfully created:

// if( capture )
becomes:
if(true)

Then change the following code:

if( !cvGrabFrame( capture ))
  break;
frame = cvRetrieveFrame( capture );
if( !frame )
   break;

to:

/*** grab here the frame from the camera using another library, and put it in a char* buffer ***/
if(failed_to_grab)
  break;

if(!frame)
  frame = cvCreateImage(cvSize(WIDTH,HEIGHT), IPL_DEPTH_8U, N_CHANNELS );

memcpy(frame->imageData,buffer,WIDTH*HEIGHT*N_CHANNELS);


And voila, everything should work... of course you need to set the right WIDTH, HEIGHT and N_CHANNELS from what you get of your camera... and this is surelly not optimized, but should get you started...


Hope this helps