Forums > Jitter

fps all over the place in Max5

April 23, 2008 | 4:14 am

I’m testing out Jitter right now in Max5 for the first time using the jit.op help file. For some reason, the fps oscillates between 6-15fps. I have overdrive turned on, otherwise all the settings are straight from the install. I am running Max 5 on a 2.0GHz Intel Core Duo Macbook Pro w/ OS X 10.5.2. This patch runs at 30fps in Max 4.6.3 / Jitter 1.6.2.

Is there a way to optimize the scheduler? Any advice?


April 23, 2008 | 4:33 am

On Apr 22, 2008, at 9:14 PM, Steve Belovarich wrote:
>
> I’m testing out Jitter right now in Max5 for the first time using
> the jit.op help file. For some reason, the fps oscillates between
> 6-15fps. I have overdrive turned on, otherwise all the settings are
> straight from the install. I am running Max 5 on a 2.0GHz Intel Core
> Duo Macbook Pro w/ OS X 10.5.2.

That’s odd. It’s a pretty steady ~30 fps on my similar machine. You
could try increasing the frequency of the qmetro which was upped to be
not so extreme in the Max 5 help patches and see if that gives any
difference, but unless you have something else open in Max 5 on your
machine, taking up CPU, I can’t think of what would lead to this.

-Joshua


April 23, 2008 | 10:59 am

I’m not seeing those oscillations, but when trying out the "discocubes" patch I posted last week in 5, I get a steady 6fps with 200 cubes, sync 0 and qmetro 10.
This as opposed to 46fps with the same settings in 4.6

MBP 2.33 intel core 2 duo, OS 10.4.11, 2gb ram, x1600 256Mb.


April 23, 2008 | 12:50 pm

Ok,

I noticed the movies I were trying were H.264 MP4s. So I dumped a couple H.264 MOVs into the patch and saw a considerable hike in performance (from 6-15fps now to 75-106fps). Still not a steady framerate by any means… but workable now!

I wonder, is Photo JPEG still the way to go in Max5?

Max 5 is amazing, great work to everyone who developed it! The video installation I’ve been working on for months in Max 4.6.3 seems to actually enjoy a performance increase in Max 5, by about 5 fps on my Macbook Pro.

Steve!


April 23, 2008 | 2:58 pm

> I noticed the movies I were trying were H.264 MP4s. So I dumped a couple
> H.264 MOVs into the patch and saw a considerable hike in performance (from
> 6-15fps now to 75-106fps). Still not a steady framerate by any means…
> but workable now!
>
> I wonder, is Photo JPEG still the way to go in Max5?

Certainly. Nothing w/r/t Codecs have changed. h.264 is typically *much*
more expensive to decompress than Photo JPEG. If you have every frame a
key frame, however, maybe it approaches Photo JPEG performance.

> Max 5 is amazing, great work to everyone who developed it! The video
> installation I’ve been working on for months in Max 4.6.3 seems to
> actually enjoy a performance increase in Max 5, by about 5 fps on my
> Macbook Pro.

Glad to hear!

-Joshua


April 23, 2008 | 3:37 pm

On Apr 23, 2008, at 3:59 AM, Brecht wrote:
>
> I’m not seeing those oscillations, but when trying out the
> "discocubes" patch I posted last week in 5, I get a steady 6fps with
> 200 cubes, sync 0 and qmetro 10.
> This as opposed to 46fps with the same settings in 4.6

Thanks for the example. I can reproduce, and we’ll work on improving
this in a near update.

-Joshua


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