Hey Bitflipper I think I found out what bapu is up too

http://youtube.googleapis.com/v/uENITui5_jU

That's wild.  

...Rolling Shutter?

I was asking if you thought it might be a rolling shutter phenomenom.

Sort of like this, but different:

http://vimeo.com/5934808

best regards,
mike

I got stuck on step one: "secure hose to speaker". I'm reluctant to tape a hose to a paper-cone speaker, so I'm thinking I should use my ADAMs, whose woofers are a man-made composite and therefore more likely to be waterproof. Yeh, that's the ticket. Oh, wait -- they don't go down to 24Hz...I'll have to throw some water on the subwoofer and see if the cone dissolves.

When I was teaching electronics in another life, we used to do a demonstration wherein we'd modulate a Bunsen burner with audio (you need a tube amp for a high-voltage signal). Sound would come out of the flame! Very cool, even if not exactly hi-fi.

Mike, I had to look up rolling shutter.  No,  it's a pure strobe effect.

You're most welcome Mike.

I'll submit my invoice via TheBouy Ltd. as usual.

bapu


Nope sharke, that's not what I'm up to.

Sharke?

ouch!




Where did the love go?

With respect,

I agree with Karyn. What wasn't mentioned, but is easy to infer, is that the digital video was shot at 24fps progressive scan.

The question I had was whether the camera used a rolling shutter or a "global shutter".

The shallow depth of field suggests that the camera has a large image sensor so it's either a DSLR or one of the nice new large format video cameras. 

The examples shown are

24hz synced to the frame rate.
23hz creates the forward movement effect
25hz creates the reverse effect

The issue about the shutter technology would concern some nuance of how the sync effect appears but the general premise that there is a sync point and a less than, and greater than frame rate that creates the effect, the premise that Karyn put forth, is a correct explanation.


best regards,
mike

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