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Speed problems with webcam (Read 1143 times)
metaphorz
Speed problems with webcam
Jun 29th, 2005, 11:01pm  
I have been testing JMyron's Processing example:

 Myron_simpleCamera

by resetting the video resolution to 640 x 480
in the code. I am getting roughly 0.5 fps on
a 3.4GHz machine with a Logitech notebook
webcam (the small dark grey one that props up on
top of the notebook). The above app for Processing
simply redirects the video stream, via Processing
code, to a window.

The problem is the poor speed: 0.5 fps (if that). Has
anyone had any better luck with getting reasonable
frame rates (15fps or higher) in Processing? I am
using vdig inside of Windows XP. The Logitech camera
software, standalone, runs great at 640 x 320 -- very
fast frame rate.
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metaphorz
Re: Speed problems with webcam
Reply #1 - Jul 1st, 2005, 3:55am  
Here is a really nice JMF implementation using a webcam
if you happen to have a Logitech camera, which I have
here at home:

http://www.mutong.com/fischer/java/usbcam/

I followed the instructions and got an ultra fast video
stream from the webcam -- all in Java. Although I haven't
gone through the .java code in great detail, I am
guessing that JMF is supporting a mass/frame data
transfer (rather than pixel at a time, which just
doesn't cut it).
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metaphorz
Re: Speed problems with webcam
Reply #2 - Jul 7th, 2005, 6:48pm  
Just wanted to close this thread - the problems
I had seemed to be due to 2 things: (1) the
example that I chose in JMyron was slow because
it copied every pixel rather than grabbing a frame,
and (2) there appears to be some significant speed
issues with JMyron compared with the Processing
video library: See:

http://processing.org/discourse/yabb_beta/YaBB.cgi?board=VideoCamera;action=display;num=1117818806
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