Error streaming video from server

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Hi all, I have a webcam usb connected to the Raspberry Pi. I installed Motion and now the Raspberry is working as a server. I used Vlc to stream and test that (open as http://192.168.1.101:8081/) and is working. Then i have installed Opencv with FFmpeg, Gstreamer and Xine like wrote in this tutorial link text. I am using this to open the streaming: ... VideoCapture cap("http://192.168.1.101:8081/"); ... and i get this error: (ERROR)icvOpenAVI_XINE(): Unable to open source 'http://192.168.1.101:8081' Segmentation fault

Anyone could help me? I have to use the webcam of the Raspberry like the webcam of my pc...is this possible? thanks in advance