video with OpenVG


to introduce my self and my poor english, i would like to let you know I’m a french student.

I’m working on a card design by renesas moreover I’m using OpenVG.
at the moment i can capture a video signal from a camera with a specific driver, put it on a layer and I screen it on TV screen without problem. I can size up or down, change the colors.
My problem is, i need to draw on this video with OpenVG and EGL. when I put the video on a layer and the draw on the other layer i can’t screen both.
so I would like to know how to use a video with OpenVG. are there a specific function or something like that.

to give you more information, I’m working with a R-GPVG2 GPU and OpenVG1_1.
I tried to be understanding.

Thank you