-
Kona3 – Frame Playback Offset tips?
Hi All,
We just upgraded to a Kona3 (from an LHe) and are having different Playback offsets then we previously did. Is there a general rule for these offsets, or is it really dependent on our decks/procs/signal flow? The LHe seemed to do fine with no playback offset on all the old layoffs (SD/HD Sony decks mosty). I found that laying off to our SRW5500 required +1, and an SD downconvert to our Digi (DVW-M2000) needed +2 with the Kona3.
We currently run everything SDI (embedded audio), simple patch bay from rooms->decks, legalizer (Harris DL860) and that’s about it. Our Avids don’t seem to get a throughput delay from the Harris, so I didn’t think that was the issue…but maybe FCP is dealing with it differently?
Just thought I would check, I think I’ve got most of the decks figured out, but just wasn’t sure if there was a rule of thumb for offsets (i.e. when downconverting, always add +1 on layback, or SD is always 0, stuff like that?) – and I figured this is the place folks would know!
Thanks in advance,
Dave
-
2 Replies
-
[Dave Gorrie] “Just thought I would check, I think I’ve got most of the decks figured out, but just wasn’t sure if there was a rule of thumb for offsets (i.e. when downconverting, always add +1 on layback, or SD is always 0, stuff like that?)”
Dave
I do not see different offsets between cards. I have always had differing offsets for decks.
+2 for an SRW5500 is the same as mine- but I have it set to +1 for the SRW1c (60p) deck and for the -1 for SRW 5800 so go figure. these are the same in dual link as single link and the same on my k3 vs LHe.
FYI- the kona conversion offset is ALWAYS 1 Frame – up/ cross/ down all are unified into the minimum delay possible and because most of those consist of field to frame conversion the delay is 1 frame no matter which frame rate you are passing thru and a one frame delay is considered realtime by SMPTE.
gary adcock
Studio37
HD & Film Consultation
Post and Production WorkflowsInside look at the IoHD
https://library.creativecow.net/articles/adcock_gary/AJAIOHD.php -
Hey Gary,
Thanks for the insight! I kind of thought it was a little bit of trial and error based on decks, but just wanted to make sure it wasn’t uh…”user error” – because that never happens!!!!
It’s been a while since we’ve done such heavy outputs in FCP so jumping back into the fire so quickly is always fun!
Thanks again,
Dave
Reply to this Discussion! Login or Sign Up