Can I use an ip based webcam with the Capture Webcam engine ?

The Capture Webcam engine will use wdm/direct show based devices, which normally means a local connected (usb) webcam. If your ip camera is able to produce mjpeg (most cameras are able to do this) you can use a small and free direct show filter written by Roman Ryltsov to turn you ip device into a direct show device. You will get more info and the download option on Roman Ryltsov blog: