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output question
client is bringing 960×720 720p60 DVCPro HD project….they need HDCam 1080i 59.94….
best way to output this is……….?
we have tried in the past to set the output to 1080i, and go to tape, but we were never able to be frame accurate…it was always 1 field early or 1 field late to tape…were never able to get it right on…with the offset settings in the deck config tool.
i have since asked 1 of our clients that does this to edit all future shows straight into a 1080 sequence which will solve the issue, but the only thing we have been able to do with the native sequence settings is to output to DVCPro, then dub and convert it to HDCam out of the DVCPro deck….
any other ideas to try?
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8 Replies
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How are you going out to tape, through a Kona card or the like?
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we have both Kona 3s and Black Magic Decklink HD cards in our FCPs…and the field issue is with either card…
Broadway Video, NYC
AVID/FCP editor/engineer -
I believe the way to go is set FCP to output your sequence natively, 720 in this case. Then go in to the Kona control panel and set it to do a 720>1080 conversion. Letting the Kona hardware handle the up-conversion rather than the FCP software.
This is the process we’ve used at my company to output to HDCAM with a good deal of success, minus the frame accuracy issue, which we have yet to find a real fix for aside from trial and error.
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Leave FCP set up as 720
Set the AJA Kona to convert to 1080.
Lay to tape.
We’ve never had an issue with this here mastering to tape and delivering to networks.
Walter Biscardi, Jr.
Editor, Colorist, Director, Writer, Consultant, Author.
HD Post and Production
Biscardi Creative Media“Foul Water, Fiery Serpent” now in Post.
Creative Cow Forum Host:
Apple Final Cut Pro, Apple Motion, Apple Color, AJA Kona, Business & Marketing, Maxx Digital. -
that was the first thing we did…and we got the field issue…on a couple decks, SR, HDCam 500s and 1800s…i could deal with playing with the offsets if it was a full frame, but the field thing is mesmerizing…
not a problem if all we did was a straight output, but if we have to insert a fix or anything, that’s when it crops up…
Broadway Video, NYC
AVID/FCP editor/engineer -
Joe,
Have you tried calling AJA on this one?
Unlike most tech support people, their guys are actually very knowledgeable video engineers who also know FCP and the most of the decks from the major manufacturers.
David Roth Weiss
Director/Editor/Colorist
David Weiss Productions, Inc.
Los AngelesPOST-PRODUCTION WITHOUT THE USUAL INSANITY ™
A forum host of Creative COW’s Apple Final Cut Pro, Business & Marketing, Indie Film & Documentary, and Film History & Appreciations forums.
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good suggestion….i have not called them, but as soon as I get a system to test it on, I will bet them on the phone.
Broadway Video, NYC
AVID/FCP editor/engineer -
When I was doing massive testing to figure out similar problems I had with conversions and delays with KONA 3, I figured it out. I corroborated my findings with AJA as well. From my notes:
When crossconverting (720p59.94 to 1080i29.97) the output from KONA 3 is frame accurate for video and audio is one field early in 29.97i.
If you aren’t getting this exact result, then perhaps you need to configure your Capture Offset in Device Control settings. This number can be set in increments of half frames (fields). For KONA 3, I came up with -1.5 as the number. Also, I have noticed weirdness with it set to read via LTC+VITC, so I set to LTC only and haven’t had any issues since. Good luck.
EDIT: as the above probably leads you to this conclusion: video and audio will be out of sync. The only true solutions to compensate for these types of conversions is to either do a separate edit for video (at conversion) and audio (with no conversion), OR slide the audio by one field (if it’s a single clip in your timeline, open in viewer and shift-click-drag to park the play head one field early and mark in, then edit back in to sequence. If it’s not a single clip, then do two passes.)
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