Can u delete a background of a small mpeg file?

[vcdfreak3240]

ok i know in movie studios how they sometimes do special fx using green screen, etc. I was wondering if there is a tool or program you could use to take out the background of an mpeg clip and insert another background. For example, say i shot a video of myself talking about a cemetary in my room...could i cut out the background of my room and put in a cemetary background. In case you're wondering..i am making a horror movie site and that's why i wanted to know.

If any of you experts out there know if you can do this or how to do it..please respond! Thanks!

[andkiich]

You could import every frame into Photoshop, take out the background, add a new one, repeat for thousands of frames. Then you'll have to re-integrate the frames back together and place them into the video. That would take FOREVER! But it will do what you want.

[johns0]

That would only take 173 days at 24 hours a day with a 50,000 frame clip at 5 mins per frame.

[Dragonsf]

Just film the person with a green background and make this color (key) transparent.

[racer-x]

It doesn't have to be green. You can use any color background as long as it is one solid color and is in contrast with the object you are filming. Then when you overlay the video on the track above the cemetery, choose "Difference Matte" as the transparency and adjust the Similarity untill you get the results you want.

[mojo2185]

If you're not able to use a green screen/solid color, you can use Adobe After Effects. I did this for one of my movies, and got pretty decent results. Basically, I drew a mask, and keyframed the verticies so the mask covered what I wanted it to. This can take some time though, but the keyframes can do a lot of the work for you. If you don't already have After Effects, it probably wouldn't make sense for you to go out and buy it because its a little expensive.