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st.t.t.t.tuttering, lagging audio….
Hey guys,
I’ve got a Kona 3 in a new mac pro, 16 gigs rams, etc. Been running my Kona 3 for about 3 months in this system with no problems until I decided to start working in 1080i HD 29.97. Now I’ve run into an issue where my audio lags, stutters, and loses sync on playback. Video plays back flawlessly, but audio doesn’t. Restarting doesn’t help.
I uninstalled Kona drivers and reinstalled, which fixed the problem for a few minutes, but it comes back. Called support, who suggested I move the Kona from slot 3 to slot 2 and flash pram. That worked, and then I used after effects which brought the problem back in Final Cut. Since AJA is out for the weekend, I’m wondering if this is just a bad Kona card or if there’s something else I could be doing wrong?
Also, when I turn video playback off, the audio on the Kona is fantastic. Turn playback on, it skkkkkkips. It seems mostly an issue when using 1080i…..
Any ideas would be appreciated.
Oh, additional technical info:
Latest Kona drivers, latest version of leopard, FCS 2, and I’m running 3 1TB Western Digital drives in an internal RAID 0 (I know, I know, it’s not safe but I’m backing them up to FW800 drives until I get a RAID 5 setup).Best,
John
Magic Feather Inc. -
21 Replies
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this is unfortunately not the answer to your question.
But 3 drives cant do uncompressed 1080i HD 29.97. The drives can’t keep up. If you are doing it – you are lucky. Try working in ProRes422HQ with 1080i 29.97 for dramatically better performance.In case I am wrong – run AJA System Test in the AJA utilities folder. Select your raided internal drives. Select a 1080i test, with a 1 Gig file size. Report back your drive speed. If you are not getting above 250Mb/sec, you can’t do an uncompressed HD show with those drives.
Bob Zelin
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Dang – I suck. I’m using ProRes 8bit, not even HQ. I’m sorry, I should have mentioned that.
John
Magic Feather Inc. -
Are you on 10.5.6 and how old is your MacPro?
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Hey Jeremy,
It’s 10.5.6 and it’s a less than 3 month old Mac Pro 2.8. Everything is running the most recent software…
My sequence is rendered out as prores, but my source video is animation codec quicktime rendered out of AE. The project is for a :20 second promo. I just flushed PRam again so it’s gone again. I guess that’s a short term solution….John
Magic Feather Inc. -
[John Davidson] “Dang – I suck. I’m using ProRes 8bit, not even HQ. I’m sorry, I should have mentioned that.
“ProRes is 10bit. Regular or HQ, it’s 10bit.
Sorry, no answer to your problem though.
Walter Biscardi, Jr.
Biscardi Creative Media
HD and SD Production for Broadcast and Independent Productions.STOP STARING AND START GRADING WITH APPLE COLOR Apple Color Training DVD available now!
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Doh. Point taken. 🙂
John
Magic Feather Inc. -
Is this 1080i29.97 or 1080i23.98?
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1080i 29.97.
John
Magic Feather Inc. -
Opened after effects to check to make sure I’m rendering out at 29.97, closed AE, opened final cut, and now, like herpes, it’s back.
This project isn’t due on Monday so I can deal with it as is for now by flashing PRAM and staying out of AE. The only other wildly unlikely possibility is that I need an HD blackburst generator? The reason I ask is that I went to a friends post house the other day and he had a blackmagic one that had multiple switches for working in 24p and other frame rates. I have an ESE blackburst generator that’s been fine for SD, and I don’t really see how that would affect playback whilst editing and previewing on an external monitor.
By the way guys, I took your advice and got the 42in Panny pro plasma (the one with 1080p HDMI inputs). It really is gorgeous, even for SD footage. Thanks for the tip.
John
Magic Feather Inc. -
[John Davidson] ” and then I used after effects which brought the problem back in Final Cut.”
something is not right, please give version numbers for OS QT FCP and Software,
and you do not mention what version of AE, Aja does not currently have working CS4-AE drivers.
that maybe the issue
gary adcock
Studio37
HD & Film Consultation
Post and Production WorkflowsInside look at the IoHD
https://library.creativecow.net/articles/adcock_gary/AJAIOHD.php
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