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Does the nano help reduce interline twitter on EX-1
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Very clear technical note, Tim.
Avoiding this kind of fabrics and textures have been a rule of thumb.
Rafael -
It’s well known that turning the detail level setting on an EX1 or EX3 down to -8 or lower reduces in camera aliasing. This also helps with SD down converts. I find I get my best SD downconversions when I reduce the resolution of the HD by roughly half before converting through the use of a mild blur filter or using a line blending filter(field blending) such as the flicker reduce filter in FCP. Again it’s all down to Nyquist theory. When down converting to SD you are starting with too many samples unless you soften the image first. For SD you don’t want more than 500 lines of resolution.
I have a NanoFlash and I have to use the same blur or softening process to get good SD down converts from HD. If I’m shooting material where SD is important then I will often shoot 720P for a better down converted result.
Alister Chapman
http://www.xdcam-user.com -
Gentlemen: Thank you ALL for your thoughtful responses! I’ve been away ill, and am now sort of back, after purchasing the Nano last week after my last post.
To Michael Slowe – Thanks, if I had an Apple, I’d purchase the Bitvice then in a millisecond, but several years ago the cult at Apple really messed with me, and I swore off Apple forever (by the way, I’m SO happy with Boxx and Vista Professional 64k and (even!) Adobe PP CS4 I could bust!
To Tim, and thanks to you…..as I’ve posted elsewhere, I’m an expert home theater builder for myself and others for just short of a quarter of a century, and the blasted twitter shows up on all of my very carefully calibrated equipment, AND every one of my customers, without exception, unless they have a very low resolution piece of junk, and then, of course, other issues appear. Also, with HDV, I’ve used only interlaced. Also, the 1,700 hours I spent last year trying EVERYTHING included setting the EX1 at at least 5 different detail levels, and on at least two of them, the twitter on fine detail was pretty much taken care of and the pictures were smush.
And to Alister – yes, 720 makes for great SD renditions, but I hate loosing the beautiful detail possible with 1080 (even with the slight detail reduction after rendering out Adobe’s anti-flicker. And for shots in 720 involving a lot of momement, my absolute preference would be for 60p, but unfortunately, the BDrs I make (always using Verbatim) – too many of them will not playback reliably on customer’s machines, same machines which have no problem with anything else I make!
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