Why is my DSLR playback so sluggish, even with CUDA?

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hello,

 

at work i'm using premiere cs5.5 on mac pro running osx 10.7.4, it's 2x2.4 quad core xeon 12gb of ram. primary edit drive raid 0 , have nvidia quatro 4000 cuda enabled in premiere.

 

my main question why dslr playback still incredibly slow when trying watch footage? maybe...4 seconds of smooth playback , gets choppy. @ 1/4 preview quality. it's when watching footage shot canon 5d mark iii.

 

i compared footage shot canon 60d , mark iii , 60d played without issue @ all, smooth way through, avg. bit rate of 5.6mb. mark iii, set on high compression (similar of 60d) avg. bit rate of 3.7mb, gets super choppy within seconds.

 

is there known bug or issue mark iii files playing in premiere? cuda seems make no difference in performance this. it's no better @ playing mark iii footage when try on 3 yr old dell studio xps laptop within premiere 5.5. laptop understand, decked out mac pro cuda? seems up.

 

i don't think it's video card (but i'm guessing), seems happen mark iii footage. when playback footage through quicktime or preview, plays without issue.

 

i find in general premiere pro sluggish on mac compared win 7 edit machine @ home, there validation that?

 

 

thanks can provide, these forums useful.

 

 

james

cuda seems make no difference in performance this.

 

that's correct, won't.

 

does apply @ all?

 

http://helpx.adobe.com/premiere-pro/kb/audio-video-glitches-avchd.html



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