Hi Philipp, On Tuesday 11 March 2008, Philipp Kolmann wrote: > On Tue, Mar 11, 2008 at 05:16:18PM +0100, Philipp Kolmann wrote: > > On Tue, Mar 11, 2008 at 05:09:41PM +0100, Richard Atterer wrote: > > > On Tue, Mar 11, 2008 at 04:55:40PM +0100, Philipp Kolmann wrote: > > > > I just wondered why my Logi 9k cam suddenly gave me 30fps at 640x420 > > > > even in modest light (Skype and luvcview). > > > > > > Maybe because some program switched off auto-exposure and used a > > > hardwired 30fps one, together with an appropriate gain for your > > > lighting conditions? > > > > Well I just tested it again. After I unplug the cam and replug it, it > > works as expected on 10-15 fps. > > > > Then I attached it one to the windows with logitech drivers and suddenly > > it works much better. > > > > Well you could be right with the settings. How can I compare the > > settings? > > I looked at luvcview -l -f yuv -i 30 -s 640x480: > > With the windows drivers once touch the cam: > > V4L2_CID_BASE (predefined controls): > index:9963776 name:Brightness type:1 min:0 > max:255 step:1 def:128 now:128 index:9963777 name:Contrast > type:1 min:0 max:255 step:1 def:32 now:33 > index:9963778 name:Saturation type:1 min:0 > max:255 step:1 def:32 now:32 index:9963788 name:White Balance > Temperature, Auto type:2 min:0 max:255 step:1 def:1 now:1 > index:9963795 name:Gain type:1 min:0 > max:255 step:1 def:0 now:255 V4L2_CID_PRIVATE_BASE (driver > specific controls): > Clean Up done Quit > > Here I get 32fps at 640. > > After power cycling the cam, I get the defaults from luvcview -l and 5fps. > After setting the Gain back to 255 the cam still only got me 5fps. > I haven't found how to disable auto-exposure so far.
luvcview doesn't enumerate all controls. The test application available at http://linux-uvc.berlios.de/test.c should work better. Use it to enumerate all controls with their current value. Best regards, Laurent Pinchart _______________________________________________ Linux-uvc-devel mailing list [email protected] https://lists.berlios.de/mailman/listinfo/linux-uvc-devel
