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Home ? Importing Assets ? Movie in background

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09/12/2010 02:23:50

TheWorkmanAndHesOK
TheWorkmanAndHesOK
Posts: 2 		Hi,

I have an idea for a comedy sketch, but first need to iron out some technical issues.

I have seen some clips where there seems to be a scrolling background or movie in the background.

My idea envolves having an animation done using a different product in the background and a muvizu character in the foreground.

My question is how do I create a background movie with a muvizu character in the foreground?
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09/12/2010 06:31:47

Matt
Matt
Posts: 40 		You'll have to create a backdrop, and change the texture to an avi file. The avi file being the background you made in the different product.

I'm not sure which codec works best, but xvid has always been alright for me. Just make sure it's not HD.
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09/12/2010 11:56:48

barrys
barrys
Posts: 102 		If you have access to 3rd party editing software then this sounds like something you can do in that, provided your editing program supports greenscreen or chromakey blending:



1. In Muvizu animate your characters against a pure green sky and ground

2. Make Movie as a TGA sequence

3. Composite the Muvizu sequence with your other movie in a 3rd party editing App.




Barry
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09/12/2010 13:28:01

TheWorkmanAndHesOK
TheWorkmanAndHesOK
Posts: 2 		Thanks guys
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14/12/2010 16:02:40

Quoling
Quoling
Posts: 112 		Would the monitor object not also do it? - I have had a avi movie running on a monitor....apologies if I have misunderstood - newbie!
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15/12/2010 12:12:26

glasgowjim
glasgowjim
Posts: 698 		You could use the monitor (or any object that you can put a texture on) if you scaled it up enough, but the easiest way to do it without using 3rd party programmes would be to use backdrops (as they have no border).
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07/01/2011 16:16:10

mos6507
mos6507
Posts: 34 		Is there any way for Muvizu to just save a 32-bit PNGs with alpha channels so that there's a nice antialiased edge around the characters? Greenscreening has obvious limitations. I've done tons of keying with Xtranormal and you always notice the edge to some extent no matter how good the keyer. Then you've got to worry about green in your foreground objects.
Here is an example of chroma-key in Xtranormal. You may think it looks okay but if you watch it at 720P and look closely, you'll see the hard edge.
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07/01/2011 16:32:59

Emily
Emily
(Account inactive)
Posts: 346 		Hi Mos6507,

The edge is very, very subtle, are you sure you're not being a perfectionist about this? If you are using the Keylight plugin for After Effects, I think there are ways to soften the edges. See here:

"Blurring the alpha channel after keying can soften the edges of the matte, which can improve compositing results."

Within Muvizu there's not much you can do, except maybe soften the image using the depth of field options within camera effects.

See more info here:

http://www.muvizu.com/Video/12419/Tutorial-08-Cameras

(About 3 minutes in)


Let me know if that helps you at all.


Emily.
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07/01/2011 17:10:51

mos6507
mos6507
Posts: 34 		I'm using Sony Vegas, not after-effects. I understand the keying is better in after-effects. I was just wondering what the technical limitation is. With full raytracers they have the ability to output with alpha channels. Is it the realtime nature of this the reason why it can't be done?
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07/01/2011 17:17:52

83fgh5t1
83fgh5t1
Posts: 10 		Nah, Muvizu can't produce a render of a single character or object. It grabs the whole viewport as a 24-bit image without Alpha channels.



But, if you're forced to do chroma-keying then you'd get the best results using Muvizu's TGA sequence output.




Les
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07/01/2011 17:26:39

mos6507
mos6507
Posts: 34 		83fgh5t1 wrote:
Nah, Muvizu can't produce a render of a single character or object. It grabs the whole viewport as a 24-bit image without Alpha channels.

But, if you're forced to do chroma-keying then you'd get the best results using Muvizu's TGA sequence output.


That's what I thought, although graphics cards certainly understand alpha channel, at least with 2D images. The codecs that Xtranormal uses aren't exactly lossless and it maxes out at 720P so I do have issues with pixelation on the edges. It doesn't help matters that there is no camera animation in Xtranormal so I have to often zoom in on these images. This would hopefully be more manageable with Muvizu. Probably the first thing I'd do with Muvizu is try blending Muvizu characters in Xtranormal and vice versa, so this is on my mind.
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