- October 24, 2008 at 5:46 pm
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!!!!!
- October 24, 2008 at 7:51 pm
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.
- October 24, 2008 at 8:04 pm
What version of the drivers are you on?
- October 24, 2008 at 8:18 pm
[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.
- October 24, 2008 at 8:42 pm
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.
- October 24, 2008 at 9:22 pm
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?
- October 24, 2008 at 9:31 pm
Not lost, but delayed a frame. Sorry about that confusion. It’s due to processing time.
- October 24, 2008 at 9:51 pm
Yes, it’s the same with NTSC.
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