Four deinterlaced frames ...bad telecine? or my bad DVD settings?

Hello all. This is my first post here and I am eagerly awaiting your expert advice.

I am working on a project that is mostly archival footage from a 16mm telecine done about 15 years ago. The telecine was done so long ago that the master is on 3/4 inch tape! (It's great stuff tough!!)

I did a "capture now" through my Blackmagic Decklink Extreme card at 10-bit into FCP. The cut footage looks great on my Apple monitor and ok on my ntsc monitor BUT when I made a DVD of the cut it looked terrible. The image was jumpy and skipping and looked like it had deinterlacing issues. Figuring that there was an a-frame issue or a field shift I did some field shift experiments in my timeline but no luck. Upon further examination of the original Quicktime files in my Capture Scratch I noticed that there is one good frame followed by four deinterlaced frames (or more acurately: four frames containing two fields that don't go together).

Am I using Shift Fields wrong? Is this some kind of crazy reverse telecine thing? Am I messing up my DVD settings?

Since it's a non-timecode source I'd sure hate to have to recapture if I can fix it some other way.

Any thoughts?

PS--
As I am writing this I just did a test using multiple field shifts and had some success adding three -1 Shift Field filters, but that seems so weird and inelegant... hmm...

Did you make the DVD by encoding an MPEG-2 via Compressor? If so, I remember reading there was a problem with Compressor's "Auto" field-dominance setting when dealing with Uncompressed 10-bit NTSC. Can't find the article right now, but I think manually changing it to "Lower" would solve the issue. The other workaround, when I used to encounter the issue, was to put the full-quality Uncompressed 10-bit movie file straight into DVD Studio Pro rather than going through Compressor.


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