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Mixed format editing
I’m working on a project that was shot in both DVPAL anamorphic and HD.
I captured the DV PAL material into a DVPAL project 720×576, I captured the HD material into a HDV 1080i50 project 1440×1080.
I’ve put all the material together into a DVPAL anamorphic project. All fine on a working level with minor adjustment to compensate for ratio differences.
I’ve met a problem outputting to SD DVD. The motion of shots originally HD with slomo applied are horribly rough. I have played around with various filters both in Cut Pro and in Compressor, geez I fluffed around so much that I can’t even remember what I did now…suffice to say none of it worked.
Should I have worked in DVPRO? If so which frame size? Should I frame blend? Should I blend fields? Should I de-interlace? All recommendations please.
Can I achieve a smooth slomo of HD material in a DVPAL sequence exported to SD DVD?
cheers shelley
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4 Replies
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The problem is that PAL DV is lower field and everything else in 25fps is upper including HD codecs. FCP renders slo mos with frame blending before the shift fields filter is applied leading to horrible choppy slo mos. ‘
Firstly I recommend your final timeline be Uncompressed 10 bit or ProRes422. This means your final render will be best for the HD material and the titles & graphics. That means that the shift fields filter will be on the DV material not the HD so any slo mos in HD will render correctly. Any slo mos with the DV material needs to be handled differently. From your original DV sequence (make a copy before changing anything), identify the slomo shots and make self contained quicktimes of those shots (pre grade is best) using current settings. Replace the slo mos shots in the timeline with these baked in slo mos and then apply grade & other filters and also the shift field filter. All the slo mos should now be nice and smooth.
Don’t deinterlace. There has to be a reason other than choppy slo mos to consider deinterlacing. It is not the fix and you will loose resolution so if you are making a program for broadcast, then do not deinterlace.
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thankyou so much
makes sense, but
do I need to apply the shift fields filter to all the DV material or can I just have the field dominance of the new ProRes sequence set to Upper?
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The sequence settings should be upper and shift fields applied to all the DV footage. In some cases FCP automatically applies the shift fields filter for you. But you need to check and put it on if FCP hasn’t
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thanks, your advise has been invaluable. Before I received your last response I did conduct a test. I exported a section of my HD material four ways.
1. ProRes 1920×1080 without slomo and field dom not set,
2. ProRes 1920×1080 with 50% slomo and field dom not set,
3. ProRes 1920×1080 with 50% slomo and field dom set to Upper,
4. ProRes 1440×1080 with 50% slomo which set itself to Upper.After DVD Studio Pro output, the only slomo that looked bad was the 1920×1080 one that I had set to Upper field dom.
Thanks again,
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