On Tuesday 15 January 2008, Antoine Cellerier wrote: > Laurent, > > On Tue, Jan 15, 2008, Laurent Pinchart wrote: > > Thanks for the patch. I'll have to discuss it with V4L developers to find > > the best way to support both relative and absolute controls. > > > > Does the camera move in response to pan/tilt or does it just crop the > > image ? > > It's all digital (nothing optical or mirrors). So the digital zoom crops > the image and the pan/tilt controls let you chose where the zoom is > centered on. It doesn't offer the relative counter part which is why I > focused on the absolute one.
This should really be mapped to the crop controls in V4L, but I can't think of an easy way to achieve that. The pan/tilt controls were not designed to select a cropped area (they express their value as an angle). UVC misses proper cropping functionality. Anyway the driver should still implement pan/tilt relative. I'll just need some time to discuss this on the v4l mailing list, as Mauro, the v4l maintainer, didn't like the idea of having both an absolute and a relative control. Best regards, Laurent Pinchart _______________________________________________ Linux-uvc-devel mailing list [email protected] https://lists.berlios.de/mailman/listinfo/linux-uvc-devel
