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> > If I try to take a picture: |
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> > |
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> > /usr/bin/v4lctl -c /dev/video0 snap jpeg 320x240 |
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> > /home/dae51d/public_html/nokia_cam.jpg |
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> > /usr/bin/v4lctl -c /dev/video1 snap jpeg 320x240 |
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> > /home/dae51d/public_html/ittybitty_cam.jpg |
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> > |
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> > Then the first one works fine, but the second one is failing with: |
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> > |
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> > v4l2: open /dev/video1: No such device |
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> > v4l2: open /dev/video1: No such device |
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> > v4l: open /dev/video1: No such device |
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> > no grabber device available |
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> |
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> yes, you probably have one bttv device with a number of inputs. you |
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> need to switch inputs. they are usually called TV, Composite, S-Video |
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> etc. If there is more than one composite they might be called |
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> Composite-1, Composite-2 etc |
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> |
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> On the other hand they may be audio inputs? 4 composite inputs is |
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> rather excessive I would have thought. |
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|
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The PCI card looks kind of like this one: |
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http://www.hauppauge.com/pages/products/data_impactvcb.html |
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But it has 3 RCA Inputs and and S-VIDEO input (see bottom of page) |
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|
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> By the way which package does v4lctl come in? |
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|
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# equery belongs v4lctl |
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[ Searching for file(s) v4lctl in *... ] |
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media-tv/xawtv-3.94-r1 (/usr/bin/v4lctl) |
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|
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> ok it is part of xawtv. just refreshing myself, you can see a list of |
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> available parameters with |
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> |
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> v4lctl -c /dev/video0 list |
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|
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attribute | type | current | default | comment |
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-----------+--------+---------+---------+----------------------------------- |
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-- |
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norm | choice | PAL | PAL | PAL NTSC SECAM PAL-Nc PAL-M PAL-N |
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NTSC-JP PAL-60 |
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input | choice | Televis | Televis | Television Composite1 S-Video |
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Composite3 |
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audio mode | choice | mono | mono | mono stereo lang1 lang2 |
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bright | int | 32768 | 32768 | range is 0 => 65535 |
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contrast | int | 32768 | 32768 | range is 0 => 65535 |
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color | int | 32768 | 32768 | range is 0 => 65535 |
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hue | int | 32768 | 32768 | range is 0 => 65535 |
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mute | bool | off | off | |
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chroma agc | bool | off | off | |
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combfilter | bool | off | off | |
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automute | bool | on | off | |
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luma decim | bool | off | off | |
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agc crush | bool | on | off | |
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vcr hack | bool | off | off | |
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whitecrush | int | 207 | 207 | range is 0 => 255 |
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whitecrush | int | 127 | 127 | range is 0 => 255 |
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|
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So this doesn't mention anything about the inputs. |
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|
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I would have thought they would be /dev/video0 ... Video2 |
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|
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Since the way that I take a snap with one camera attached to the card is |
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like this: |
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/usr/bin/v4lctl -c /dev/video0 snap jpeg 320x240 |
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/home/dae51d/public_html/nokia_cam.jpg |
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|
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Notice the "-c /dev/video0" |
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|
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|
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-- |
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