realistic performance expectations

Feb 17, 2011 at 12:12pm

realistic performance expectations

The question is – how realistic is what I am trying to do ?

I am trying to crossfade jpegs, at the minute 1500 x 1000 pixels. The snag has been getting xfade fed a smooth stream of numbers so that the crossfades are smooth and flawless. About 90% of the time they are but then, whatever method of generating the numbers for xfade that I use – cpuclock or line, the rest of the time the numbers choke and there is a hiccup in the crossfade.

I imagine this is due to processing power v image size. Ideally I want the image no smaller than my screen, 1440 wide. My processor is a 2.5 GHZ core 2 duo.

Is this unrealistic ?
If so might I succeed with a faster machine. Like a 3.2 GHz intel core i3 processor, or a mac pro 2.8 GHz quad core ?
What would realistic expectations be to achieve a 100% of the time flawless xfade ?

Thanks,

Jem

#55017
Feb 17, 2011 at 5:41pm

Don’t know if [bline] would help, has worked for me before when [line] has choked things.

#198101
Feb 17, 2011 at 6:26pm

I’ve just been testing with some 2400×600 jpg’s and patch below and haven’t seen the problem you mentioned yet. I’m on a MBP 2.66Ghz Intel Core 2 Duo.

– Pasted Max Patch, click to expand. –
#198102
Feb 17, 2011 at 6:55pm

Thanks Luke, bline I had no greater luck with but I will study your patch.

Cheers

Jem

#198103
Feb 19, 2011 at 6:30am

There’s an alternate strategy for fading between still images, using only one jit.qt.movie. It should be more efficient:

– Pasted Max Patch, click to expand. –
#198104
Feb 22, 2011 at 7:22pm

Totally OT:
How do you create the piece of code that you write here and use for “New from clipboard”?

#198105
Feb 22, 2011 at 8:22pm

@ Home Surgery:
Check here: http://cycling74.com/forums/topic.php?id=26095

(spoiler: select the stuff you want to post here, click edit > copy compressed)

#198106

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