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Few questions about editing movies

 


Keran
Hey, I'm planning on making a little movie for my classmates, something of a commemoration of all the years we've been together as a class. And I need to know a few things that will really help me when editing a movie.

I've tested a lot of software ranging from the free one Windows Movie Maker, through more pro such as the one from Adobe, to Sony Vegas, which I find the best among them. I want to know these things:

1) When I have a graphic, some picture. Let's say a bottle. I want to paste only the bottle to the movie, but when I save it in photoshop and upload it to Vegas the background of the picture is also there. How do I make the background transparent leaving only the object?

2) What setting should I choose for rendering to not end up with a +5gb file? All those funny settings are confusing. If my movie will last, let's say 10 minutes, what setting should I choose so that it won't have more than 100-200mb, but still have decent quality? Is there any universal setting that is the best to choose when rendering such movies? And If I'll have to upload it to youtube I might have to make it even smaller...

3) This question is probably a long shot, but I'd like to know how does the green screen technique works, or whatever it's called. What I'm getting at is if I have a set, where the actor is standing in front of a green screen, how do I change the green screen into some sort of a scenery (like some background picture, or maybe something moving, as in a movie clip), leaving the actor visible in the foreground. I really have no idea how it works and I always wanted to figure this out. Any links would be helpful.

I've been playing with editing software for not very long and even though I get my way around these problems, knowing them would make my life so much easier.

Thanks in advance.
Cheers, Keran
Magicman
1) If saving the image with transparency doesn't work when importing into the video editing program, try setting the background as a single color and chromakeying (greenscreening) it out.

3) I'm not sure how it works exactly but I'm pretty sure it involves every pixel being analyzed to see if it is within a certain threshold of a specified color value. These pixels are then changed to transparency. You should try searching google to see if you can find any actual technical explanation.
r4inm4ker
Keran wrote:

1) When I have a graphic, some picture. Let's say a bottle. I want to paste only the bottle to the movie, but when I save it in photoshop and upload it to Vegas the background of the picture is also there. How do I make the background transparent leaving only the object?


Have you removed the background via photoshop or other image editor first? I believe that any decent video editing software would be able to load tiff image with transparent background...

Keran wrote:

2) What setting should I choose for rendering to not end up with a +5gb file? All those funny settings are confusing. If my movie will last, let's say 10 minutes, what setting should I choose so that it won't have more than 100-200mb, but still have decent quality? Is there any universal setting that is the best to choose when rendering such movies? And If I'll have to upload it to youtube I might have to make it even smaller...


you might want to save out the video using compressed format. I suggest using AVI or mov format with xvid or H264 codec.

Keran wrote:

3) This question is probably a long shot, but I'd like to know how does the green screen technique works, or whatever it's called. What I'm getting at is if I have a set, where the actor is standing in front of a green screen, how do I change the green screen into some sort of a scenery (like some background picture, or maybe something moving, as in a movie clip), leaving the actor visible in the foreground. I really have no idea how it works and I always wanted to figure this out. Any links would be helpful.


That's called "matte painting". Search google for that term or just "matte" and you'll find alot of information.

Hope that helps..
Cliffer
for video,you'd better use tiff file or tga file.
Keran
It seems I've figured out everything Very Happy My images now have transparent background, I'm saving the movie in a decent quality with not so big size and I learned this whole matte technique (it's amazingly easy ;o ). I'm gonna poke around more with all those things now ;]

Thanks a lot for all the help.
Whong
Also an effective way of adding stuff to your film is making the objects in 3D and then adding them to a film or a picture.

Here is a nice tutorial for doing it on Cinema 4D. Wink

http://www.maxoncomputer.com/tutorial_detail.asp?tutorialID=243

Hope that helps. Wink
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