composite camera is displayed on raspberry pi2 by USB3.0 UVC CVBS grabber card

1. USB3.0 FEBON264 UVC CVBS grabber card

2. FEBON264PLUS can output mjpg /yuv
USB3.0 mode: yuv /mjpg
USB2.0 mode: mjpg only

3. video latency
USB3.0 mode: (PC test)
yuv: 0.04sec -0.08 sec
mjpg : 0.05-0.12sec

USB2.0 mode (PC TEST)
mjpg :0.05 sec-0.12 sec

USB2.0 mode ( pi2 test)
mjpg : 0.2 sec