[jitter] Re: Jitter Video Playback - Amatuer or Professional Grade?

Well. Its complicated, you could probably improve your timing by

a) if just using playback use direct to window method (see help)

b) not use any UI elements that update rapidly, and if you have to  
use qlim to slow them down.

c) if using matrix manipulation
	use @unique and qmetro
	play with your performance settings to optimize based on your patch  
requirements.

d) use clocker message to spawn only one central clock (each metro,  
delay, speedlim, qlim etc object spawns its own timer). (only matters  
if you are using tons of line/delay etc objects)

and of course, try and optimize your patch.

But, im a professional video engineer as my day job (and a vigilante  
jitter programmer at night ), and as far as I can tell, there is some  
inherit jitter (pun intended) with the scheduler, and since at most  
you will have one extra thread, youre going to hiccup occasionally.

I hope Jitter 2.0 tries to solve some of these issues, but its been  
mentioned before numerous times.



On Jul 1, 2007, at 5:45 PM, marcus lyall wrote:

>
> Can anyone run me through exactly why Jitter can't run smoothly at  
> 30fps (or 25fps)?
>
> I can understand it when you're doing lots of complicated  
> processing. But when you're just trying to play back a quicktime  
> with a few objects in the chain? And the processors are barely  
> breaking into a sweat?
>
> Is it to do with where Jitter is getting it's timing from? From  
> other posts I'm presuming that the metro object is not up to the  
> task...
>
> Is it a deep-rooted issue that is intrinsic to the program  
> architecture? Or is it something that could be sorted out with a  
> 'timing external' or something similar?
>
> Could the output be buffered in some way to make it smoother? Even  
> an additional frame delay would be tolerable if it was predictable  
> and gave smooth output. This issue is the single thing that stops  
> me using Jitter for a whole bunch of 'professional' projects.  
> Looking forward to doing my design work with a graphics tablet, a  
> Lemur, a Matrox MXO  and a (rented in) HD deck. Someday?
>
>
>
>
> _______________________________________________
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> jitter at cycling74.com
> http://www.cycling74.com/mailman/listinfo/jitter

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