Finally VoCore arrived!
I used mjpeg-streamer r148 and it works! I have made some benchmarks with a usb webcam from a death notebook and with vocore connected in STA mode (maybe this could be a bottleneck).
BENCHMARKS:
1) resolution 160x120 (very fluid streaming)
Command: /usr/bin/mjpg_streamer -i "input_uvc.so -d /dev/video0 -resolution 128x96 -y" -o "output_http.so -www /www/webcam" -b
FPS analysis: 15 fps
CPU usage: 20-30%
2) resolution 320x240 (pretty good streaming)
Command: /usr/bin/mjpg_streamer -i "input_uvc.so -d /dev/video0 -resolution 384x288 -y" -o "output_http.so -www /www/webcam" -b
FPS analysis: 13 fps
CPU usage: 40-60%
3) resolution 640x480 (very, very, (very) slow streaming)
Command: /usr/bin/mjpg_streamer -i "input_uvc.so -d /dev/video0 -resolution 640x480 -y" -o "output_http.so -www /www/webcam" -b
FPS analysis: 4 fps
CPU usage: 100%
Soon I'll test a usbip environment