AJA Kona playback sync slipping in Premiere

[Peter Garaway]

Hi Brad,

I have not seen this myself. AJA released a new driver today. Please try giving it a try and reporting back.

Here’s the link:

https://www.aja.com/en/products/kona-lhi#support

Best,

Peter Garaway
Adobe
Premiere Pro

[Brad Bussé]

Thanks. I installed the 10.4.9 driver but still experiencing the same issue.

[Brad Bussé]

Hi Peter,

An update here. I didn’t actually have the update to PP 7.1 installed yet. After updating my test sequence took some time to reprocess the footage and I was hopeful that it might implement a fix, but no luck. I had been using ProRes 422 and ProRes LT as the preview codec for this sequence. I tried switching that to AVC 1080p, and now the one second lag that develops on the playback monitor is reduced to half a second.

I know that PP no longer utilizes specific sequences for video cards, like the old AJA sequence settings. However, I guess I’m not clear how exactly that process is handled now. I had assumed that any variances in frame rates and resolution between the sequence and the video cards’ output settings wouldn’t be effecting timing due to all of the conversions being handled by the dedicated hardware scalers/pulldown right on the card. Is that still how real-time scaling/pulldown is handled?

Does the new structure of non-reliance on hardware-specific sequences mean that freerun sync in now a lll solely handled by software? Is there some way to ensure a more reliable method of sync between Premiere’s canvas/viewers and the external playback monitor so that the frame buffer data is synonymously linked via hardware? If additional hardware is required to complete the sync, perhaps AJA/BM could work with Adobe to create a chip dedicated to the canvas’ sync so that a blackburst generator can be looped inline between that and the video card? I’m kind of just thinking out loud, so hopefully you can educate me on why I might be experiencing this lag in sync.

Thanks.