Hi Cedric,
Did you try to use the e-CAM32_OMAP_GSTIX(www.e-consystems.com/omapovero.asp)
?
This can provide 30fps at 640x480.
The e-CAM50_OMAP_GSTIX can do 50fps at VGA and can do
720p@30fps. We have several customers using with open CV applications.
Hari shankkar