Re: video capture H/W??

From	ebenZEROONE@verizon.net (Hactar)
Newsgroups	comp.os.linux.hardware
Subject	Re: video capture H/W??
Date	2011-05-30 15:23 -0400
Organization	A noiseless patient Spider
Message-ID	<ge7db8-5gk.ln1@pc.home> (permalink)
References	<94ai4gFbgfU3@mid.individual.net> <slrniu0cet.8kf.bill@lat.localnet> <irr11h$ld9$1@dont-email.me>

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In article <irr11h$ld9$1@dont-email.me>, J G Miller  <miller@yoyo.ORG> wrote:
> On Friday, May 27th, 2011 at 19:21:01h -0400, Bill Marcum explained:
> 
> > With a USB camera, you don't need any additional hardware, except a
> > microphone if you want sound.
> 
> In fact quite a number of the higher end USB cameras actually have
> an inbuilt microphone.
> 
> Also for those who have not heard about it, there is now a working
> open source USB over IP client and daemon
> 
>      <http://sourceforge.NET/projects/usbip/>
> 
> So with adequate bandwidth, it should be possible to use cheese,
> for example, to connect directly to a USB camera on a remote host.

USB 1.1 probably does not have adequate bandwidth.  Uncompressed 320x240
24-bit video at 15 fps is 320x240x24x15 bits/sec = 76800x360 b/s =
27648000 b/s = about 26 Mib/s.  USB 1.1 is (according to WP[1]) limited to
12 Mib/s.  So either it needs some heavy duty compression, or lesser
video, or you can get a USB card.

[1] http://en.wikipedia.org/wiki/USB_1.1#Signaling

-- 
-eben      QebWenE01R@vTerYizUonI.nOetP      royalty.mine.nu:81

Q: What did one photon say to the other photon?
A: I'm sick and tired of your interference. -- thebigmike1983 on Fark

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video capture H/W?? notbob <notbob@notbob.invalid> - 2011-05-27 21:07 +0000
  Re: video capture H/W?? Bill Marcum <bill@lat.localnet> - 2011-05-27 19:21 -0400
    Re: video capture H/W?? J G Miller <miller@yoyo.ORG> - 2011-05-28 14:32 +0000
      Re: video capture H/W?? ebenZEROONE@verizon.net (Hactar) - 2011-05-30 15:23 -0400
        Re: video capture H/W?? "Trevor Hemsley" <Trevor.Hemsley@mytrousers.ntlworld.com> - 2011-05-30 18:08 -0500
          Re: video capture H/W?? ebenZEROONE@verizon.net (Hactar) - 2011-05-30 19:20 -0400
            Re: video capture H/W?? J G Miller <miller@yoyo.ORG> - 2011-05-31 12:52 +0000
            Re: video capture H/W?? "Trevor Hemsley" <Trevor.Hemsley@mytrousers.ntlworld.com> - 2011-05-31 14:10 -0500
              Re: video capture H/W?? ebenZEROONE@verizon.net (Hactar) - 2011-06-01 00:32 -0400

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