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hdv deinterlace to 50 percent slowdown in fcp?
hi
we’ve just shot some footage for a low budget music video with the sony hdr-fx1 in hdv 1080 50i…
I want to deinterlace the footage and export progressive half vertical res fifty percent slowdown frames to shake for compositing work
(so we want to to make 2 1440×540 progressive frames from every 1440×1080 hdv frame). we are then going to composite at 1440×540 and then scale to a PAL anamorphic master 720×576 for final release (oversampling is good…)is exporting the 2 1440×540 clean progressive frames possible directly from fcp or do I need to do this inside shake?
another thing I’ve noticed… if I export a hdv shot from fcp as a quicktime hdv file quicktime claims its 1920×1080… even though
we know the true resolution of hdv is 1440×1080, and it looks like the quicktime is recompressed to be scaled to the new resolution. I get noticeably better results if I export a 100 percent jpeg sequence from fcp than exporting a hdv movie, which makes no sense as in theory fcp should be able to export a hdv movie without recompressing… anyone have ideas what’s going on? -
4 Replies
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[eskatonia] “we know the true resolution of hdv is 1440×1080”
No, its 1440×1080 anamorphic — unsqueezed ist 1920×1080.
As for deinterlacing, I’d check out Graeme Nattress’s website and his set of filters at http://www.nattress.com
Sorry I didn’t address your other questions, maybe someone with Shake experience can address those.
DRW
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ok but 1440 is the actual pixels captured (non square pixels)… to get a 1920×1080 quicktime means you have to decompress and
recompress which is almost certainly not what you want to do… so the default behavior when exporting a HDV movie from final cut is seriously broken….exporting an image sequence leaves it as 1440×1080, when comparing the two the quality is noticeably higher…
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“G Map Frames” in standards converter will do exactly what you want, convert 50i into a 50p of twice the length, ie 50% slowdown. Smart de-interlacing looks good too. http://www.nattress.com Email me if you need a demo.
Graeme
– http://www.nattress.com – Film Effects and Standards Conversion for FCP
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thanks for the suggestions…
in case anyone else finds it useful it worked really well to export directly from final cut pro as 100 percent jpeg sequences.
then in shake you can build a simple tree to split the individual interlaced frames and do a 50 percent slowdown.. as we already had shake that was the easiest method.
i can get beautiful clean looking 720×576 50 fps progressive frames using this method…
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