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. Sorry for the spam Philipp -- The more I learn about people, the more I like my dog! _______________________________________________ Linux-uvc-devel mailing list [email protected] https://lists.berlios.de/mailman/listinfo/linux-uvc-devel
