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Article #1102

Re: Electronics Engineering Video Blog

#1102
From: David L. Jones
Date: Mon, 06 Apr 2009 03:14
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"Mark Harriss" <billy@blartco.co.uk> wrote in message 
news:iOGdnaIwsYcy7UTUnZ2dnUVZ8vSWnZ2d@westnet.com.au...
>   Have you seen those cheap $15 webcams at the import shops?
> it may be worth grabbing a couple for the "Studio"

I'm using an "ancient" 2 y/o webcam.
Just discovered that that frame rate appears to vary with the image 
brightness!
When I useed it the other day to shoot it was working fine at 30fps, but I 
was playing with it this morning and it was only 10fps. Point it toward a 
bright light source like the window and it climbs up to near 30fps again. A 
linear type increase with brightness. Weird.
Just realised too that my digital camera has a 640x480 30fps video mode and 
can also be used as webcam. The webcam mode only seems to work at around 
10fps (no brightnes issue), but the standalone video mode works great. Only 
limitation is the internal mic is a bit noisy and is only sampled at 8 bits.
So unless I upgrade my gear, the choice at the moment is either higher res 
and clearer video with so-so audio, or 320x240 webcam quality with good 
audio...

Perhaps a new $15 webcam is in order!

Dave. 
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From: "David L. Jones" <altzone@gmail.com>
Newsgroups: sci.electronics.design,aus.electronics
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Subject: Re: Electronics Engineering Video Blog
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Date: Mon, 6 Apr 2009 13:14:58 +1000