> Is it feasable in such a 4 input card to map each channel to a separate > device - ie. /dev/video0, 1, 2, 3 and have the one driver handle all at > once. Would such a driver allow "simultaneous" capture from all 4 > channels - I suppose the driver itself would do some sort of internal > switching... It is possible to do that. You can do it even without multiple devices. The driver can maintain separate input settings per file descriptor, then switch around depending on which application wants capture a frame. But I don't see the point why the driver should do that. It basically moves the input switching from the application into the driver. It is a bad idea to do that without strong reasons. Just making your app development a bit easier is no strong reason. Gerd -- #define ENOCLUE 125 /* userland programmer induced race condition */
