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What’s happened?
After months of Rock solid operation my Kona 3 has suddenly become very unreliable laying back to tape – it drifts around by a frame. I’m laying back to an a500p Digi – Ref is set to input video I’m using the latest drivers (but not the latest ver of leopard 10.5.4 and not the latest quicktime 7.5) It sounds like the decks having trouble getting a stable signal. Its taken me a day to fix an audio dropout – it reminds me of Cinewave days!!!!!
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14 Replies
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Is your Dbeta machine looped in to the Kona? If so try pulling the ouput of the Dbeta (or input in the Kona) and see what happens.
What drivers?
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Thanks Jeremy,
I’ve tried both – even with the digi connected just to the kona op and ref’ing input video it’s still all over the place.
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What version of the drivers are you on?
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i downloaded them today to try to fix this – I should point out that Im down converting a 1080i50 sequence to pal 625 (never tried this before)
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[Sean Davison] “I should point out that Im down converting a 1080i50 sequence to pal 625 (never tried this before)
“A ha. That’s it. You will lose a frame due to the conversion. You will have adjust accordingly.
Jeremy
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Very interesting. Jeremy can you explain why? I’m trying to understand why a frame would be lost. Aren’t you just going from 1920×1080 @25 fps to 768×576 @25fps? How is this different from an NTSC downconversion @ 29.97? Just curious as to the technical reason.
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Ah – ok. Makes a lot more sense. Thanks for the clarification. Is this not the case with an NTSC downconvert or do you have to account for the one frame with any K3 conversion?
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Not lost, but delayed a frame. Sorry about that confusion. It’s due to processing time.
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Yes, it’s the same with NTSC.
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Is that acknowledged in the manual? Seems like a big deal and I can’t remember ever hearing that before regarding the hardware down-converts.
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