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Re: video capture under linux

Quickcams... Unless you can buy an old connectix color or color II or Black
and white they will not work with linux for a while. the VC and all the
other versions currently available were re-designed to supposedly increase
performance and changed drastically so that all linux drivers would not
work.

-----Original Message-----
From: Dr. Terrance Boult <>
To:  <>
Cc:  <>
Date: Wednesday, May 05, 1999 10:29 AM
Subject: Re: video capture under linux

>>>Date: Tue, 04 May 1999 00:20:21 -0500
>>>From: Ashley Clark <>
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>>>I am thinking of installing a camera on my computer and I need to know a
few
>>>things.
>
>I am presuming this is for a wearable computer.  There are a few sites on
the
>more generic camera-on-linux issue.
>
>>>
>>>1. What cameras work with linux (I know the Quickcam BW does, but what
else?)
>
>Its not just a question of camera's,  it is a question  of capture devices.
>The BW quickcam uses the Parallel  port, so it does not need any special
>devices.  There performance is pretty poor but if they are sufficient
depends
>on what you want to do with them.
>
>The bt848 based cards (see below) are good devices for capture.
>If you don't have  a wearable CPU yet, then the netwinder might be a good
>choice for you (it includes a video capture device)
>
>There are also specialized cards like the Adjeco card that are both a
capture
>and DSP device.  Good if you know what you want to do to the picture.
>
>
>>>2. Where can I find the Quickcam's that work with Linux, I've heard that
some
>>>of the newer ones don't work at all with Linux...
>
>can't say, I found them unusable for my work.  If you are set on it, I
could
>sell my old one (ugrad students currently use it for projects).
>
>>>3. What about video capture using the video4linux subsystem? (Like SGIs
do?)
>
>While its a poor video capture standard (and even more poorly documented)
it
>works okay for bt848 based cards as well as a few other cards.  Of the
>supported cards, however, only bt848 cards comes in a wearable size, i.e.
in
>pc104+ format.  Both imagenation and sensoray make pc104+ bt848 based cards
>but I've had lots of problems with the sensoray cards.
>
>Be careful when going this route as many of the pc104+ mainboards are not
>compatable with DMA oriented frame-capturing devices like the bt848.
>(E.g. the parvus screaming 104 and the advanced digital logic msmp5-smart
>both lock up the bus when used with bus-mastering devices.  The
manufacturers
>have not been helpful in resolving the problems)
>
>Terry Boult --- Vision and Software Technology Lab, EECS Dept. Lehigh Univ.
>          http://www.eecs.lehigh.edu/~tboult
>
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