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Re: fast image display [message #30751 is a reply to message #30742]

Wed, 15 May 2002 10:26

Rick Towler
Messages: 821
Registered: August 1998

Senior Member

The rate that TV can write images to the screen is dependent on your
hardware and the images you are displaying. I just displayed a 768x512x24
image using tv at 25 fps so real-time playback is reasonable if you have
sufficient juice in your PC. I don't think there is a faster way to display
something other than using direct graphics. Using object graphics will just
introduce more overhead.

Don't shy away from writing .AVIs. I highly recommend Ronn Kling's IDLtoAVI
windows only .dlm based on Oleg Kornilov's code. I have been using it and
loving it for about a month now. No wasting your time writing frames to
disk and using an external program to combine them. It does all the work
for you. (I can even let my users make their own .AVIs now!) I use it with
the ligos indeo 5 and divX codecs and get excellent results that far exceed
MPEG-1 in quality and compression rates. (just remember you need the codec
installed on your playback machine.)

The .dlm can be found here:
http://www.kilvarock.com/freesoftware/dlms/avi.htm

codecs here:
http://indeo.ligos.com/pi=103.php (best for x-platform support)
http://www.divx.com/divx/ (best compression rates)

-Rick

"Dan Larson" <drl16@cornell.edu> wrote in message
news:MPG.174c58eb5cdb33fd98968d@newsstand.cit.cornell.edu...
> I would like to display large (768 x 512) 24 bit color
> images at video rate in a graphics window. In the past,
> I have relied on writing AVIs or MPEGS, but this approach
> is time-consuming. The simple approach (using TV) reaches
> about 4 frames/s on my PC. Is there an easy way to
> accomplish fast display in a graphics window?
>
> Cheers,
>
> Dan

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[Message index]

		Re: fast image display By: David Fanning on Wed, 15 May 2002 16:48
		Re: fast image display By: Dan Larson on Wed, 15 May 2002 16:45
		Re: fast image display By: Dan Larson on Wed, 15 May 2002 16:33
		Re: fast image display By: Rick Towler on Wed, 15 May 2002 14:35
		Re: fast image display By: David Fanning on Wed, 15 May 2002 14:29
		Re: fast image display By: David Fanning on Wed, 15 May 2002 13:33
		Re: fast image display By: David Fanning on Wed, 15 May 2002 13:30
		Re: fast image display By: Mark Hadfield on Wed, 15 May 2002 13:17
		Re: fast image display By: Rick Towler on Wed, 15 May 2002 10:26
		Re: fast image display By: R.Bauer on Wed, 15 May 2002 09:43
		Re: fast image display By: Mark Hadfield on Wed, 15 May 2002 17:27

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