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Comment by lukeholder | Hacker News Reader

You can see that the first flipbook has a digital overlay mask for the sync of the mouth video to the words. See his right hand fingers.

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Yeah, there's definitely a lot more manipulation than they admit to. Around 1:50-2:00, a guy is turning a crank that flips the pages of another flipbook, but the pages keep turning at the same speed even while the speed of the crank changes dramatically.

Also, the apparent lack of regard for personal safety irks me a little. Wear some eye protection, dudes!

It's may have a flywheel to keep it consistent speed. It kind of looks like one at the top.

The fact that they were confident enough to not wear eye protection is one more thing that makes it impressive. I mean, certainly they have an insurance company that would want to see that they are being safe, right?

I assumed the crank was attached to some kind of flywheel that kept spinning after he stopped cranking. Just a guess.

From the behind the scenes video [0] it looks like safety was taken into consideration (though the final edited product doesn't make this obvious).

[0] http://okgo.net/2016/11/23/the-one-moment-bts/

Here's the robotic camera control arm they used which you can see in the BTS video.

http://www.cameracontrol.com/equipment/bolt/

Yeah, the choreography was impressive for what it was. Claiming that it was "real" when there are clearly multiple aspects of the clip that are, at the very least, time shifted relative to each other in the same frame, cheapens it a bit to me.

The first few seconds are legit, then the flipbook synchs up and you have that "oh wow" moment that sadly I am coming more and more to associate with "no wait, it's bogus."

Great song and great video clip, though, even if it's not "real".

There's certainly no way he could have flipped the pages at the correct rate.

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