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Comment Re:Good Stuff (Score 4, Funny) 92

Whoa there buddy. I'm not against "super"conductors. I just think we should suspend all research, development or mention of them until they've been proven completely and absolutely safe. We wouldn't want them accidentally polluting our good, clean, natural, organic conductors, now would we? Think of the children!

The Courts

Submission + - US DOJ claims it did not entrap Megaupload (

angry tapir writes: "The U.S. Department of Justice did not mislead a court and attempt to entrap file storage site Megaupload on copyright infringement charges, the agency said in a new filing in the case. Megaupload's charges that the DOJ conspired to entrap the site on criminal copyright charges are "baseless," an official with the U.S. Attorney's Office for the Eastern District of Virginia wrote in a court document filed last week. Earlier this month, Megaupload filed court documents saying that in 2010 the DOJ asked the site, through its hosting vendor, to keep infringing files as part of a DOJ investigation, then later charged Megaupload with copyright infringement."

Comment Re:Tired of Luddites calling higher FPS "soap oper (Score 1) 599

What this means is there's no practical (the film industry definition of practical) way of getting more motion blur than your frame rate and shutter angle allows.

You'd know better than me, but I suspect recording at higher frame rates then digitally down converting the rate down would allow you to get more than 360 degrees of shutter angle. So you could get a blur like 24 fps with 24 fps speeds. Of course that would be expensive today, but in a few years, I wouldn't be surprised if it become common place.

I've done the same thing with our radar system. Our raw "frame rate" is 1/200 of second at a 348.75 degree shutter. Post processed we usually use 1/5 of a second and the shutter angle varies depending on what we're trying to see.

You're right, there's ways of cheating around it after it's been filmed. You have the luxury of simply needing it to be accurate rather than just look good to someone else though ;)

Comment Re:Tired of Luddites calling higher FPS "soap oper (Score 1) 599

So could one film at 48fps with a higher shutter rate to get a smoother (i.e. more motion blur) effect?

Theoretically 24fps with a 180 shutter angle and 48 with a full 360 shutter angle would have the same amount of motion blur, as they'd both expose the individual frames at 1/48 second. I'm not sure how'd that'd look, or if its even possible to do with a camera. Might be fun to try.

Comment Re:Tired of Luddites calling higher FPS "soap oper (Score 1) 599

What this means is there's no practical (the film industry definition of practical) way of getting more motion blur than your frame rate and shutter angle allows.

Post processing by averaging frames is definitely practical, especially as these were shot on digital cameras to begin with. Of course, you loose most of the benefit of the higher frame rate if you do that, but it is entirely possible if they decide they don't like the raw results.

"Practical" in film terms has a very precise meaning which I kinda glossed over. It means something that can be done in camera. What you're referring to is what would be referred to in the past as a "special" effect. Today I mostly hear it referred to as a post effect, digital effect, or more commonly, expensive. :)

but yes it is possible

Comment Re:Tired of Luddites calling higher FPS "soap oper (Score 1) 599

It sounds like you're saying that this formula holds:

disk spin rate ~ (proportional to) shutter angle * frame rate ... and that if you keep the speed at which the disk spins fixed, then as you bump up the frame rate, the shutter angle falls.

Why not simultaneously make the disk spin faster, and increase the frame rate, so can keep the same shutter angle?

Ehh... its more like (1/framerate) / (shutter angle/360) = shutter speed. So at 24fps at 180 degree shutter angle you'd have a shutter speed of 1/48 of a second. Compare that to 48fps, where you have 1/96 of a second exposure. You now have twice the FPS with half the motion blur. You wouldn't think it would look much different but it does. That's the difference between "dreamy" 24fps and "more realistic" 48fps.

Though since you brought it up, you could theoretically shoot at 48fps with a full 360 shutter angle and would have the same motion blur as 24fps at 180. I have no idea of how it would look, or if thats even possible with any camera, but it'd be interesting to try.

Comment Re:Tired of Luddites calling higher FPS "soap oper (Score 1) 599

Hi there. Technical director here. Just need to step in a clarify the relationship between frame rate and motion blur... Here's the catch though: because your film stock is rolling by at 24 frames per second, each frame can only be exposed for 1/24 of a second or less. If you use a smaller shutter angle, or faster frame rate, you get less motion blur.

That sounds like it used to be true for old-fashioned film photography, but is surely irrelevant in a world where we can post-process to get any effect we want, and can use CCDs on digital cameras to be exposed for as long as we want.

Not at all irrelevant. I can't expose frames for a full second if I expect to be filming at 24 frames per second. In fact, to actually record 24fps, I need to expose and record 24 frames per second. I can of course, lower the frame rate in post through a variety of methods, and there are even some tools for interpolating higher frame rates (e.g.Twixtor for AE). But there are no straight forward ways of exposing longer than your frame rate allows.

Comment Re:60fps with motion blur may provide a solution (Score 1) 599

I recently played a game called Nitronic Rush (fast free Wipeout clone, with tron-esque graphics, great fun btw). I set it to 60fps, but the graphics are 'enhanced' by motion blur, which 60fps normally doesn't 'need'. We're talking at least a couple of frames worth, and maybe up to 5 frames worth of artificial motion blur. However, I find this actually gets the best of both worlds. You get the smoother motion so that your eyes don't ache, and any fast panning looks convincing. But you also get the cinematic 'blurry' look that 24fps films provide (24fps film techniques employ motion blur naturally, or at least something similar to motion blur).

I think 60fps with this kind of motion blur may have a big future for it.

Sorry, but while you can do high frame rates with large motion blur values on the computer, it doesn't work like that for film/video. I've written a whole long post as to why it doesn't in a thread below, but the short of it is this:you can't get more motion blur than your frame rate allows. If you're shooting 60fps, that means 1/60 second or less of motion blur, which isn't much. In the CG and gaming world, there are cheats around this. But again this doesn't work for film/video (unless you add it in post, but again that's a CG cheat ).

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