Hi Oliver, On Thursday 19 March 2015 06:57:24 Oliver Lehmann wrote: > Hi Guennadi, > > Guennadi Liakhovetski <g.liakhovetski@xxxxxx> wrote: > > As for the actual question, I have no idea how they implement still > > images: the UVC standard defines two methods for higher-resolution still > > image capture: either using the "still image trigger control" or a > > dedicated bulk pipeline (and a hardware button if there is one on your > > camera?) FWIW, in either case I'm not sure whether the driver supports any > > of those methods. I think bulk pipe support has been added to it at some > > point, but what concerns switching... Not sure really, sorry. > > The cam has a button but it is labled with a phone receiver so I guess it > is not there for taking still images. The MS-Software on Windows has two > buttons - one for taking a photo and one for recording a video. If you > switch the resolution to 1080p or "8MP", the video button gets disabled and > all someone can do is capturing a photo. More informations about the cam: > > root@reis /root> v4l2-ctl --info > Driver Info (not using libv4l2): > Driver name : uvcvideo > Card type : Microsoft LifeCam Studio(TM) > Bus info : usb-/dev/usb-/dev/usb > Driver version: 2.6.38 > Capabilities : 0x84000001 > Video Capture > Streaming > root@reis /root> v4l2-ctl -L > brightness (int) : min=30 max=255 step=1 > default=133 value=85 > contrast (int) : min=0 max=10 step=1 > default=5 value=5 > saturation (int) : min=0 max=200 step=1 > default=103 value=100 > white_balance_temperature_auto (bool) : default=1 value=1 > power_line_frequency (menu) : min=0 max=2 default=2 value=2 > 0: Disabled > 1: 50 Hz > 2: 60 Hz > white_balance_temperature (int) : min=2500 max=10000 step=1 > default=4500 value=2500 flags=inactive > sharpness (int) : min=0 max=50 step=1 > default=25 value=25 > backlight_compensation (int) : min=0 max=10 step=1 > default=0 value=0 > exposure_auto (menu) : min=0 max=3 default=3 value=3 > 1: Manual Mode > 3: Aperture Priority Mode > exposure_absolute (int) : min=1 max=10000 step=1 > default=156 value=156 flags=inactive > pan_absolute (int) : min=-529200 max=529200 > step=3600 default=0 value=0 > tilt_absolute (int) : min=-432000 max=432000 > step=3600 default=0 value=0 > focus_absolute (int) : min=0 max=40 step=1 > default=0 value=28 > focus_auto (bool) : default=1 value=0 > zoom_absolute (int) : min=0 max=317 step=1 > default=0 value=0 > root@reis /root> Could you please post the output of "lsusb -v" for your camera (running as root if possible) ? > The "nice" part is, that it has a real hardware focus which is fantastic > for my needs. The autofocus mode does not work with v4l2 somehow (image > gets not focused), but for my needs, a manual focus is OK. Thats why I > have autofocus disabled. I never tested capturing a video - maybe > autofocus works there when taking more than one frame because it needs > some time to focus ;) > > > But if you just try to be opportunistic and try cheese - it has a separate > > setting for still images, so, maybe I'm way behind the time and everything > > is working already? > > The problem is:- The system is a headless system - so no monitor and no Xorg > installation (some X11 dependencies are installed tho) and I guess cheese > has no commandline interface? -- Regards, Laurent Pinchart -- To unsubscribe from this list: send the line "unsubscribe linux-media" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
