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Kona LHe, MASSIVE video drift!
Hello All!
This is my first post to the forums, but I have encountered a strange issue, and was wondering if this community might be able to offer some insight.
Suddenly, on Monday morning, one of our FCP stations started to ‘drift’. The analogue video output (composite AND component) would play back in what appeared to be slow-mo. The audio played back at the proper rate, and the video seemed to get slower and slower the longer it was played. After 20 seconds of playback, the video would be a good 5 seconds behind the audio. I checked everything I could think of, and all settings and connections seemed correct / unchanged.
The solution (work-around) that I figured out involved routing the audio output of FCP through the Mac’s Line-out, rather than through the Kona card. As soon as the audio is routed out the Mac, it runs perfectly, if I route the audio back out the Kona card, the drift appears immediately. It’s almost as if the card ‘can’t handle’ the effort of playing both audio and video.
FCP session timeline is DV, and there are 6 channels of audio.
The work-around seems to be fine, and the editor is able to work just with no problems, but it seems strange that routing the audio through the Kona card would upset the video playback.
Note: The preview window in FCP does not drift, only the analogue video output. I didn’t have and SDI monitor available to test if the digital video was affected the same way!
Any thoughts? Hints? Tips? This one’s an odd one!
Thanks
Mark Pinder, Chief Technical Engineer, Paperny Films.
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12 Replies
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Got your PCIe Expansion Slot Utility setup proper?
Easy setup proper?
Latest drivers for your version of FCP?
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I had a somewhat similar issue once that was cured by simply unistalling the Kona drivers and then reinstalling.
David Roth Weiss
Director/Editor
David Weiss Productions, Inc.
Los AngelesPOST-PRODUCTION WITHOUT THE USUAL INSANITY™
A forum host of Creative COW’s Business & Marketing, and Indie Film & Documentary forums.
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[JeremyG] “Got your PCIe Expansion Slot Utility setup proper?
“Check this. Power loss of PRAM reset can unset this. If it isn’t in a 4x lane slot, you’ll get what you described.
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I’m relieved that someone else has the same video drift issue!
My preview monitor is connected to the SDI out of the AJA kona.I’m all thumbs when it comes to hardware. where do I check this “PCIe Expansion Slot Utility setup”?
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HardDrive > System > Library > CoreServices > Expansion Slot Utility.app
Run it and choose option 2. Then restart.
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Thanks Jeremy.
My world is good again. -
No worries. Glad you are up and running!
Jeremy
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I know this has been solved but I had a similar problem with a newer mac (the new macs don’t have the expansion slot utility, or they do and it’s disabled)
I had a Kona LHe showing the same problem. In this case I had to change the PCIe slot from 4 to 2… this seems to have solved the problem.
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Hi Guys,
I know this is an ancient thread, but I’ve just started having this problem after upgrading to Snow Leopard. I’m working on pro res 1080p30 material and find if I change the video playback (in a/v settings) to Kona 8 bit (from the default 10 bit) it comes back in sync.If anyone has a solution to this problem I’d love to hear it. A long chat with Aja tech support didn’t resolve it.
Thanks!
Bob PIerceDirector of Photography • Editor
http://www.lightstreamassociates.com -
Have the same issue – anyone else get this resolved?
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