Enable FFMPEG instead of XINE? (Bug #2730)

Hi, all:

Environment:
OS: Ubuntu 12.04
OpenCV: 2.4.3 release

Trying to grab images out from Foscam IP cameras.

code patch is posted:

cv::VideoCapture camera;
camera.open("http://192.168.1.33:44433/videostream.cgi?user=user&pwd=password");

Error message obtained:
*io_helper: I/O error: No route to host
(ERROR)icvOpenAVI_XINE(): Unable to open source 'http://192.168.1.33:44433/videostream.cgi?user=user&pwd=password' *

It seems there is priority to look for functions inside file cvcap_xine.cpp, instead of cvcap_ffmpeg.cpp ? Maybe my brain is a kind of messy, but IMO, ffmpeg should be powerful enough to stream the data over Internet. By the way, besides, cvcap_ffmpeg.cpp, there is also cvcap_gstreamer.cpp ...

Is there a way for us to specify which tool is to be used to open the VideoCapture ? For example, I prefer using ffmpeg, or gstreamer, rather than xine?

Cheers
Pei