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HDV Capture
Hello-
I have footage shot on a Canon XHA1 at 1080i and 24 fps and using it as my deck to capture via firewire. I’m trying to figure out the best way to capture and edit the material.
The first question I have is, do I need to create a new sequence preset or can I use one that is already in the menu? I see only the following options: 1080i50/60 and 1080p24
Second question is 3 parts, a) under capture presets, is it HDV or HDV with apple intermediate codec, and b) why can’t I modify either of those presets? c) Why would the AIC capture out of sync and HDV capture perfectly fine?
My last question is, which preset can i use that will allow me to capture and edit at low resolution (the equivalent to offlineRT for DV) and then re-capture at Full Res.
I am on a Quad G5, FCP 5.1.4
Your help would be greatly appreciated.
Thank you
Todd
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2 Replies
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All good questions…
I can’t be authoritative, but here’s what I have observed. Many of these 24p formats are handled differently in capture situations and are brought in as i60 or other with pulldown — beware that there are different cadence sequences — some are traditional 2:3:2:3, and there are variations including the very clever 2:3:3:2 Advanced Pulldown. You should edit on a 24 frame timeline, though to avoid cadence incoherence.If you actually shot at 1080i then I strongly doubt that a progressive codec will help you. I also have my doubts about exactly how “interlaced” HDV is, considering the Long-GOP MPG structure…
You may not experience any quality differences between the HDV and HDV Apple Intermediate — there is also a SONY HDV codec just to add to the confusion.
Use the one that works. Whats worse? Out of sync capture is bad enough… I have to wonder if HDV is entirely sync-stable as a format, though.Capture and edit at low resolution? How low is low? HDV is already nearly the same as standard def DV as far as bitrate is concerned. What you do need is the processor power to crank it back up to 1080. Maybe the thing to do is to take the clips off-line, down-rez to 720×480 anamorphic and go from there…. anybody else? proxies?
JPO
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Are you mixing 1080i60 and 1080p24, or is it all 1080p24?
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