Creative Communities of the World Forums

The peer to peer support community for media production professionals.

Forums AJA Video Systems What’s happened?

  • What’s happened?

  • Sean Davison

    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!!!!!

  • Jeremy Garchow

    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.

    What drivers?

  • Sean Davison

    October 24, 2008 at 7:55 pm

    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.

    http://www.twotallmen.co.uk

  • Jeremy Garchow

    October 24, 2008 at 8:04 pm

    What version of the drivers are you on?

  • Sean Davison

    October 24, 2008 at 8:09 pm

    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)

    http://www.twotallmen.co.uk

  • Jeremy Garchow

    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.

    Jeremy

  • Mike Zimbard

    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.

  • Mike Zimbard

    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?

  • Jeremy Garchow

    October 24, 2008 at 9:31 pm

    Not lost, but delayed a frame. Sorry about that confusion. It’s due to processing time.

  • Jeremy Garchow

    October 24, 2008 at 9:51 pm

    Yes, it’s the same with NTSC.

Viewing 1 - 10 of 15 posts

Log in to reply.

We use anonymous cookies to give you the best experience we can.
Our Privacy policy | GDPR Policy