Invisibale skateboards? at DVinfo.net

Chris Mandel · April 10th, 2006, 11:19 PM

http://www.youtube.com/watch?v=4cPWC...e%20skateboard
How is this done?

James Lundy · April 11th, 2006, 04:24 AM

The skate boards might be entirely green/blue, and then removed using Chromakey. Then the footage with the board missing might have been placed on top of footage without any skateboarder in it at all.

Any immediate shadow under their feet could be added as well with effects software.

Graham Hickling · April 12th, 2006, 10:44 AM

What a great little video - I'm still smiling...

Jean-Francois Robichaud · April 12th, 2006, 11:36 AM

I doubt chromakey would have worked for this. Probably painstaking rotoscoping. And considering that the camera moves all the time, I don't think the clean matte was from another shot, but rather from parts of the same shot. I've done something like this before (though it wasn't anywhere as complicated). It's too bad the compression is so high; I don't know if the effect would look clean in uncompressed video.

Nick Jushchyshyn · April 12th, 2006, 11:51 AM

This is a segment from a video/movie called "YEAH RIGHT!" directed by Spike Jonze.
Some info at Amazon:
http://www.amazon.com/gp/product/B00...v=glance&n=130

The boards were painted green to facilitate keying ... some roto was surely used as well ... and the camera was on a motion control rig, so they could get a clean plate take to put in place of the boards. (the motion control rig makes the replacement pretty routine... just a key + roto to matte out the board & shadow)

Jean-Francois Robichaud · April 13th, 2006, 07:34 AM

Interesting.

It's got a really raw, almost handheld feel to the camera movement, which didn't look like any motion control was used. It makes it all the more impressive that one was used.

James Lundy · April 14th, 2006, 06:28 AM

Quote:

Originally Posted by Jean-Francois Robichaud

which didn't look like any motion control was used.

I never figured that any motion control rig was used either, but it makes a lot more sense to me knowing so. Otherwise, that would have been a 'lot' of work in the post.

Matthew Wilson · April 14th, 2006, 09:13 AM

Actually, they may have used something like MOKEY which can essentially automate the roto process, remove the skateboards and automatically fill in the background. Check it out at http://www.mokey.com/

April 10th, 2006, 11:19 PM	#1
Chris Mandel New Boot Join Date: Aug 2004 Location: bay area Posts: 10	Invisibale skateboards? http://www.youtube.com/watch?v=4cPWC...e%20skateboard How is this done?

April 12th, 2006, 11:36 AM	#4
Jean-Francois Robichaud Regular Crew Join Date: Sep 2005 Location: Montreal, Canada Posts: 142	I doubt chromakey would have worked for this. Probably painstaking rotoscoping. And considering that the camera moves all the time, I don't think the clean matte was from another shot, but rather from parts of the same shot. I've done something like this before (though it wasn't anywhere as complicated). It's too bad the compression is so high; I don't know if the effect would look clean in uncompressed video. __________________ JF Robichaud

April 12th, 2006, 11:51 AM	#5
Nick Jushchyshyn Major Player Join Date: Feb 2004 Location: Philadelphia, PA, USA Posts: 548	This is a segment from a video/movie called "YEAH RIGHT!" directed by Spike Jonze. Some info at Amazon: http://www.amazon.com/gp/product/B00...v=glance&n=130 The boards were painted green to facilitate keying ... some roto was surely used as well ... and the camera was on a motion control rig, so they could get a clean plate take to put in place of the boards. (the motion control rig makes the replacement pretty routine... just a key + roto to matte out the board & shadow) __________________ Nick Jushchyshyn Matchmoving, Compositing, TD imdb

April 13th, 2006, 07:34 AM	#6
Jean-Francois Robichaud Regular Crew Join Date: Sep 2005 Location: Montreal, Canada Posts: 142	Interesting. It's got a really raw, almost handheld feel to the camera movement, which didn't look like any motion control was used. It makes it all the more impressive that one was used. __________________ JF Robichaud

April 14th, 2006, 09:13 AM	#8
Matthew Wilson Major Player Join Date: Dec 2004 Location: Los Angeles Posts: 259	Actually, they may have used something like MOKEY which can essentially automate the roto process, remove the skateboards and automatically fill in the background. Check it out at http://www.mokey.com/ __________________ MW

April 11th, 2006, 04:24 AM	#2
James Lundy Regular Crew Join Date: Apr 2006 Location: West Lothian - Bonnie Scotland Posts: 51	The skate boards might be entirely green/blue, and then removed using Chromakey. Then the footage with the board missing might have been placed on top of footage without any skateboarder in it at all. Any immediate shadow under their feet could be added as well with effects software.

April 12th, 2006, 10:44 AM	#3
Graham Hickling Trustee Join Date: May 2004 Location: Knoxville, Tennessee Posts: 1,669	What a great little video - I'm still smiling...

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