Forums > MaxMSP

cpu optimization with jit.qt.movie rate of playback

August 15, 2013 | 6:30 pm

Hi. I am using a patch with the audio volume controlling the rate of speed a movie playback and it is killing my cpu. I’ve been using the internal sound card on a MacBook Pro – is it better for the cpu to use an external sound card? Or is rate a tricky parameter? Or is it better to give it simple values like on and off – 1 and 0 messages?
patch is attached – thanks for any suggestions.


August 15, 2013 | 11:56 pm

Patch is not attached…


August 16, 2013 | 2:00 am

woops…this should work…

Attachments:
  1. Vilnius___.maxpat

August 16, 2013 | 2:54 am

The patch itself doesn’t seem too CPU-stressing on my late-2009 MBP (I tried with a bunch ov videos, HD too, and it stays between 20% and 45%). Maybe it’s related to the codec of your video?


August 16, 2013 | 3:04 am

hmm – i’ve tried a range of codecs – but consistently seem to have this issue – what is the best codec to use anyways?


August 16, 2013 | 6:28 am

Photojpeg @ 75% is a common choice.


August 16, 2013 | 11:14 am

are you using 32 or 64 bit Max?


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