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Late-night at edit house: output to HDCAM steppy– why??
Late night urgency: so I’m at a facility doing a transfer from FCP sequence to HDCAM deck.
The file was an original DVCPROHD 720p 23.98 movie, brought here in native form, placed on a ProRes AJA Kona 720p59.94 sequence and rendered (2 hours). The render was spot-checked and seemed OK.
An HDCAM format of 1080i 59.94 was requested by the projectionist who will be showing this movie on Wednesday.
That sequence was routed through the Kona to the deck (with what I believe I saw as a 1080i 29.97 throughput). The deck control panel reads that it is recording in 1080i 59.94.
The movie is now being printed to tape. The image quality is fine BUT I am seeing a steppy behavior in all pans and some zooms. This is handheld doc so there’s a lot of camera movement and when projected 50 feet wide it will be motion sickness.
What could be the problem here? Should the original file have been rendered to some other format first?
Two things to know: 1) this facility could not play the original 23.98 frame rate through their routing to the deck even though the deck can record 23.98, and 2) the projectionist told me he wanted 59.94 1080i only if I couldn’t provide a 23.98 HDCAM.
So any thoughts on how to solve this issue? I’m laying it all back anyway to have something but it may well be rejected by the projectionist.
Thanks for any ideas…!
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11 Replies
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Sorry, it’s a Kona 3.
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What Kona card?
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Why not use the real time cross conversion? You could go 720p23.976 to 1080i in a click or two.
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They tried that here at this place two days ago and they told me their routing system would not accept a 23.98 throughput to the deck. So I called the projectionist and he said 1080i 59.94 was OK instead of 23.98.
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Let me ask you this then: if I could do the real time cross-conversion from a 23.98 ProRes 1280×720 sequence to 1080i via the Kona 3 the way you’re supposed to be able to do it– like you say with a couple of clicks- is it typical to have steppiness in the pans since the frame rate has changed?
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You can cross convert to 1080i29.97 from 23.98. No 23.98 necessary.
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Adding pulldown can look a bit jittery as it’s the nature of the game. It should look relatively natural, though.
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OK then, I will try and find someone here who can make it happen the way it is supposed to work.
Thanks, Jeremy!
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It’s easy, bud.
Use a 720p23.98 VFR easy setup with a codec that matches your timeline
Open the Aja control panel.
Right click the appropriate output triangle, (SDI1 for example) and choose Secondary from the drop down.
Right click again and choose 1080i from the drop down.
You should see a cross convert icon in between the frame buffer and the output triangle.
Jeremy
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Fallow Jeremy’s advice.
All is in the AJA Control Pane, and that is what the KONA is designed for.
rafael
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