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SexyPancakes
09-05-2003, 01:26 PM
The making of the following music videos:

Metallica - Frantic
Linkin Park - Numb

and finally

Alanis Morrisette - Thank U

Basically I wanna see how the did the effect where the background objects are sped up and slowed down while the forground subject stays at normal speed. I have a rough idea how they did it.

The way I see it the would have filmed the scene twice over. One without the foreground subject, used a fast speed (or lower exposure setting) on the camera and filmed that. Then secondly the may have filmed the foreground subject in exactly the same place (or on a blue screen) but at normal speed. Then later in post production combined the two to get the effect.

Or if its possible maybe they filmed both foreground and background together but got the foreground subject to act slower so that it would show normal whilst everyone else appears to be moving fast that the camera loses some amount of focus on them.

Fair enough its a matter of trial and error on my part there to get it right. But im wondering if specilaist equipment is required. Is it possible to use some of todays home cameras to od this effect? I know you can adjust shutter speed / exposure on some. Or am i on the realms of timelapse cinematography here?

Anyways, any advice, or info would be welcome. Im trying to mimic this effect but add to it or custom it to my own uses for a TV ident. So im going to do a bit of experimentation too.

Im thinkin maybe I could even film what im filming and altering the playback on computer, but I fear it may appear juddery and wont get the effect im quite looking for.

anyways thanks in advance for any pointers and info you can give me.

beaker
09-05-2003, 08:13 PM
You could do it by filming both elements separately and then just retiming the part that you want to slow down or speed up. There are many different retiming packages out there.

Revision Twixtor: http://www.revisionfx.com/rstwixtor.htm
Realviz Retimer: http://www.realviz.com
TimeMaster: http://www.phoenixtools.com/
http://www.phoenixtools.com/product...r_frameset.html
Furnace plugin set from the Foundry has a really nice one called Khronos: http://www.thefoundry.co.uk/

Also most editing/compositing packages have built in retiming software, but it is usually pretty crude compared to the standalong/plugins I named above.

Another way would be to take the background elements and camera map them onto dummy objects in 3d and then animate them so the move really fast or slow. Pretty much just doing a Q&D recreation of the background. Then you can controll the amount of motion blur that is on individual objects and how much they streak by.

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