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Blackmagic 10bit Field dominance problem
Hi there,
I’m using Final Cut Pro 5.1.2 on a mac G5, I have a DVCPRO 50 deck hooked up through a Blackmagic SDI card.
I’ve just inherited this setup (and job) so this could be an easy fix that I’ve just completely overlooked.My problem is this: The job I am working on dates from before I worked here so I haven’t set it up. It seems source footage has been captured as DV-PAL (There is also a Sony deck connected) but the sequences are Blackmagic PAL 10-bit. The field ordering for the Blackmagic 10bit sequences are definitely set to upper (which is correct) but when I playback I still have bad jitter on moving objects within the footage.
The source footage as I said is DV-PAL, the field dominance ‘not set’ according to Final Cut. I would think that it is actually lower.
Any help or advice would be most appreciated!!!
Thanks,
Will -
4 Replies
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This is what I do in these kinds of situations. Change your Easy Setup to reflect what the project is supposed to be and create a new sequence. Now from the browser (not the original sequence) drag one of the clips into the new sequence. Final Cut will automatically do things to make it match. Sometimes it will automatically add the “Shift Fields -1” filter. Sometimes it will change the Motion settings (scale and distort). The thing is, FCP 5.1.2 usually knows the difference between source and sequence, and adjusts accordingly when you drag it in from the browser. For example, drag an HD clip into an NTSC sequence, it will scale it and adjust the aspect ratio properly.
So once you do it, double click and examine in the viewer what changes it is making. Then you can copy and paste attributes to the clips in your working sequence.
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Hi Will,
The first thing you must do is to know yourself the field order of your footage and set it properly in the FC brownser. Interlaced footage should never appear “NO SET”. Unless you had deinterlaced it previously or you had captured with the wrong order, should be “lower first”.
When you drag a “lower-first” clip to a “Upper-first” time line (or the opposite, an “upper-first” clip to a “lower-first’ time-line) FC sts a “Shift-fields” filter in the clip to read the clip properly. BUT IF YOU ARE USING A BLACKMAGIC CARD the BM do the same by itself shifting the field order. So we got the field order changed twice and the final field order is WRONG. You must take out the “Shift-fields” set by FC and let the BM card do the job. At least this is what happens to me. I run FC 5.0.4 and I’ve got a BM SD.
Cheers,
Rafael -
I sometimes had a problem where the SDI output of the DVCPRO 50 deck would output lower field first. Problem couldn’t be fixed so I used the RGB output which gave upper field first.
Kool En De Anderen
dual 1.8 gig G5/Mac OS 10.4.8/Kona 2/Hugh 800 G diskarray, fibrechannel/FCP 5.1.2/AE 7 Pro
http://www.koolendeanderen.nl -
Thanks for all your help guys… unfortunately I have had to online to a lower res and use DVPAL anyway because our SCSI drives are down.
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