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Old December 22nd, 2008, 12:28 AM   #1
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How to get best quality EX1 Slow Motion?

Shoot in-camera 720p (60fps) or 1080p (30fps) and slow down in post? I am excited about the SDHC media solutions that have been developed by some of you in the community here. Thank you so much! Planning a month and a half in the Canadian arctic in 2009, and this means maybe not even having to bring a laptop into the wilderness and worrying about power for it. Back to my question: the SDHC solution doesn't allow for overcranking it seems, but if one is seeking BEST IMAGE QUALITY with the EX1, wouldn't that be achieved using the highest quality footage first (1080p) and then slowing down in post? I'm using FCP , Motion (optical flow for slow- mo). Besides, it's often difficult to know until you are editing just what pieces you might want slowed down, and to what rate. EX1 doesn't do 60fps in 1080P (unlike the shoulder mount XD Cams), so you would be throwing out detail from the get go. My goal is to maintain highest image quality to satisfy HD broadcasters. Should I ever bother overcranking in camera if the quality will suffer, or am I missing something? Thanks...
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Old December 22nd, 2008, 12:34 AM   #2
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720p is part of the official HD broadcast standard. Why on earth would it not be supported? Many cameras cannot overcrank at their best resolution. I don't see this as an issue. The 720p image out of the EX1 is lovely, and certainly nothing anyone would fault you for. It's also more pleasant to work with in post.

If you need the overcranking, shoot 720p60 or do real overcranking. Yes, the SDHC solution will not work for overcranking but they DO work for 720p60. So if that works for you, you're golden.
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Old December 22nd, 2008, 12:49 AM   #3
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I even think that 720p does a better downconvert to SD Mpeg. I'm testing 1080p vs 720p and have found 720p gives a better image, why I dont know. What i'm thinking is that there is less info to downconvert to SD.
Sorry re read your post and your going to broadcasters. 720p is still fine though
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Old December 22nd, 2008, 12:50 AM   #4
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Thanks... but I'm still wondering if anyone has done a comparison as to which method yields the highest image quality. As a side note, editing on a 1080P 37" Sharp Aquos LCD, I do find the 1080P footage I shoot to be more nicer than the 720P, though it is also very nice, more pixels is more pixels :)
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Old December 22nd, 2008, 04:30 AM   #5
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No question it's 720/60P, otherwise "Planet Earth" would have been shot on Sony F900 at 1080/30P rather than 720P Varicams. You just can't get the smooth slomo in post production from 30P material. It's better from 60i by de-interlacing but still a bit jittery and of course you're losing resolution in the process so losing the benefit of 1080.
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Old December 22nd, 2008, 04:50 AM   #6
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Thanks for the Planet Earth example... that kind of clear example in the broadcast world helps a great deal.
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Old December 22nd, 2008, 04:55 AM   #7
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Certainly use 720/60, we recently did a shoot with a HDCam 790 shooting as "A" camera and an EX1 shooting slowmo at 720/60 at the same time. If I slowmo the 790 footage it doesn't look anywhere near as good as the EX1.

I'd post an example but some of you may be offended by footage of a female dancer in her underwear!
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Old December 22nd, 2008, 05:19 AM   #8
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What about 720/50 for pal?
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Old December 22nd, 2008, 06:49 AM   #9
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Steve, might I ask how you are doing slowmo? Are you using the NLE or something like Twixtor or Motion (with optical reflow on).
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Old December 22nd, 2008, 07:25 AM   #10
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SlowMo in Motion with optical flow on.
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Old December 22nd, 2008, 09:15 AM   #11
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720/50 for PAl would be the same as 720/60 for NTSC.
But if you're after slomo for PAL, you might as well use 720/60, or is there a reason not to that I don't know about?
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Old December 22nd, 2008, 10:02 AM   #12
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I'd post an example but some of you may be offended by footage of a female dancer in her underwear![/Q

oh no, by all means let us see. we're all professional adults here. post away!!!
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Old December 22nd, 2008, 12:35 PM   #13
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http://www.flyingmachinestv.co.uk/framerate.wmv 68mb file.

It's not very scientific but it may help.

(WARNING: If you are offended by women in skimpy underwear then don't download)
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Old December 22nd, 2008, 01:10 PM   #14
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It was hard to judge well because of the difference in framing, but the EX1 certainly looked smoother in slow mo.

As an aside, how was this lit? Looked quite good actually.
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Old December 22nd, 2008, 01:24 PM   #15
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If one doesn't have the overcranking limitation by the SDHC cards, isn't it better to do 720p (30fps) overcranked to 60fps in camera, than to do 720p (60fps) and slow in post? I just want to make sure I'm understanding this correctly and the solutions you're giving are specific to the SDHC limitations.
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