Hi Julian, On Sat, Dec 15, 2007 at 03:32:35PM +0100, Julian Oliver wrote: > are there any plans to expose this automatic light calibration as a param > accessible to modprobe? i'd like very much to not have this automagical > calibration at work at all times.
This is already possible, although luvcview doesn't always behave deterministically for me when doing it. In luvcview, I switch auto-exposure mode off (may require several random clicks on Auto Exposure On/Off), then set the exposure to some high value (300 seems to stand for 30 fps), then adjust the gain to get a light enough picture. Unfortunately, the picture may still be too dark at maximum gain (255), so you may also have to play with brightness and contrast. For me, picture quality is good even with little light. With almost no light, just what's coming from my 2 screens, I start to see some noise (vertical blue/orange stripes), but the picture is still OK, if slightly blurry. Compliments to Logitech/Zeiss!! :-) IMHO, it wouldn't hurt at all if the auto exposure mode were a bit less conservative. It would also be convenient if you could specify a minimum as well as a maximum framerate. Cheers, Richard BTW, changing controls is also possible with uvcdynctrl <http://www.quickcamteam.net/software/libwebcam/> and v4l2ucp <http://sourceforge.net/project/showfiles.php?group_id=146218>. -- __ _ |_) /| Richard Atterer | GnuPG key: 888354F7 | \/¯| http://atterer.net | 08A9 7B7D 3D13 3EF2 3D25 D157 79E6 F6DC 8883 54F7 ¯ '` ¯ _______________________________________________ Linux-uvc-devel mailing list Linux-uvc-devel@lists.berlios.de https://lists.berlios.de/mailman/listinfo/linux-uvc-devel
