On Mon, 28 Nov 2005 23:09:31 -0800 "Daevid Vincent" <[EMAIL PROTECTED]> wrote:
> > > If I try to take a picture: > > > > > > /usr/bin/v4lctl -c /dev/video0 snap jpeg 320x240 > > > /home/dae51d/public_html/nokia_cam.jpg > > > /usr/bin/v4lctl -c /dev/video1 snap jpeg 320x240 > > > /home/dae51d/public_html/ittybitty_cam.jpg > > > > > > Then the first one works fine, but the second one is failing with: > > > > > > v4l2: open /dev/video1: No such device > > > v4l2: open /dev/video1: No such device > > > v4l: open /dev/video1: No such device > > > no grabber device available > > > > yes, you probably have one bttv device with a number of inputs. you > > need to switch inputs. they are usually called TV, Composite, S-Video > > etc. If there is more than one composite they might be called > > Composite-1, Composite-2 etc > > > > On the other hand they may be audio inputs? 4 composite inputs is > > rather excessive I would have thought. > > The PCI card looks kind of like this one: > http://www.hauppauge.com/pages/products/data_impactvcb.html > But it has 3 RCA Inputs and and S-VIDEO input (see bottom of page) > > > By the way which package does v4lctl come in? > > # equery belongs v4lctl > [ Searching for file(s) v4lctl in *... ] > media-tv/xawtv-3.94-r1 (/usr/bin/v4lctl) > > > ok it is part of xawtv. just refreshing myself, you can see a list of > > available parameters with > > > > v4lctl -c /dev/video0 list > > attribute | type | current | default | comment > -----------+--------+---------+---------+----------------------------------- > -- > norm | choice | PAL | PAL | PAL NTSC SECAM PAL-Nc PAL-M PAL-N > NTSC-JP PAL-60 > input | choice | Televis | Televis | Television Composite1 S-Video > Composite3 > audio mode | choice | mono | mono | mono stereo lang1 lang2 > bright | int | 32768 | 32768 | range is 0 => 65535 > contrast | int | 32768 | 32768 | range is 0 => 65535 > color | int | 32768 | 32768 | range is 0 => 65535 > hue | int | 32768 | 32768 | range is 0 => 65535 > mute | bool | off | off | > chroma agc | bool | off | off | > combfilter | bool | off | off | > automute | bool | on | off | > luma decim | bool | off | off | > agc crush | bool | on | off | > vcr hack | bool | off | off | > whitecrush | int | 207 | 207 | range is 0 => 255 > whitecrush | int | 127 | 127 | range is 0 => 255 > > So this doesn't mention anything about the inputs. Read again, it says you have inputs called "Television, Composite1, S-Video and Composite3". Do not confuse your video device with the card's input. You get one video device, and unless you have another v4l device present it certainly will be /dev/video0 You get a number of inputs to that device, which controls what is seen on /dev/video0. I note that on your device there are 4 physical composite inputs, but only two compsite inputs are exposed by the driver. This may be because no-one ever wrote the bttv driver expecting a card with 4 composite inputs, or it may be because the kernel has not recognised the card properly and has set up the driver wrong. Take a look at the kernel documentation in Documentation/videoforlinux, in particular CARDLSIST.bttv. If you can find your card number you can add it to your module loading line as is well documented for these cards. > > I would have thought they would be /dev/video0 ... Video2 > > Since the way that I take a snap with one camera attached to the card is > like this: > /usr/bin/v4lctl -c /dev/video0 snap jpeg 320x240 > /home/dae51d/public_html/nokia_cam.jpg > > Notice the "-c /dev/video0" > > > -- > [email protected] mailing list > -- [email protected] mailing list
