Forums > Jitter

Small questions / installation requirements


Julien Bayle
Dec 18 2012 | 10:27 am

Hi mates,
I’d like to know some opinions about an installation.

– 3 videoprojectors/screens (= 1 matrix only in jitter considering what I have to do)
– playing videos from files only, moving video matrices a bit and fading them
– playing multichannel sounds (no more than 4 x stereo) and no processing of sounds

videos are all DV formats (meaning that the global matrix won’t be more than 2160 x 576 pixels)
probably triplehead2go to use (?)

would a dedicated Mac Mini be enough ??

any helps or leads would be appreciated.


dtr
Dec 18 2012 | 10:36 am

Hey, I’m using a triplehead like that as well, but for openGL rendering. 3 times 800×600 stitched together to 2400×600. For video I estimate a recent mac mini (core i processor) should be enough but make sure your videos are in a low CPU load codec like MJPEG.


Julien Bayle
Dec 18 2012 | 10:39 am

thanks for your answer.
I target something like the i7 2,3Ghz + 8Go RAM

Ok about the codec stuff. That is important.
A big batch to push every content to MJPEG can easily be done by content providers.


dtr
Dec 18 2012 | 12:00 pm

i7 should be plenty.
Btw, instead of merging the 3 streams in 1 matrix you can upload ‘m to 3 videoplanes in one GL context. No heavy matrix operations needed. Use UYVY color mode for efficiency, see patches at http://abstrakt.vade.info/?p=147
Not sure how the integrated graphics processor of these mac mini’s handle this kind of GL operations though. You should compare the 2 approaches in practice.


Julien Bayle
Dec 18 2012 | 2:59 pm

targeting that proc because they have that budget and want to reuse the computer for other install. I think that could be good for their future.
thanks for the vade’s link. I have checked that one day. nice optimizations check list :)

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