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Field Dominance & FCP Filters
Received some Apple ProRes NTSC Quicktime spots that had obvious field dominance issues when playing out SDI from FCP. The clips check into FCP with field dominance as none despite being NTSC which should be lower if they were created correctly. I’m guessing they were downconverted from progressive HD to NTSC while somehow still not being assigned field dominance. Changing the field dominance on the clip in the browser to match the proper ProRes NTSC sequence didn’t work nor did a shift field filter. However, the de-interlace filter did work only when setting the attribute to flicker filter-max. It did not work when de-interlacing upper or lower.
Even when selecting the filter to not strip upper or lower, but flicker-max, does the flicker-max setting still strip one of the fields and interpolate what’s left?
I’d just like to know if anyone knows what’s going on with such clips and if this was the proper way to fix them. I could be wrong, but my guess is that an NTSC clip (which should have field order) that FCP can’t determine the field order of and thinks has none, still may be an interlaced clip and by de-interlacing it and putting it in a lower dominant sequence is like double negatives creating a positive…???
Compressors field magic couldn’t fix it either. Thanks for any input.Chad Brewer
Senior Tape Operator/Engineer
TeleVersions -
1 Reply
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No reason to deinterlace. Most like, the footage is psf, which means working in progressive in FCP. Put the footage in a none timeline, with none field dom selected on the clips, and everything will render progressively. Once laying off to tape, the footage will get played back psf.
Jeremy
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