How to cut an object from a video? (Sony Vegas)

[BlitzWarTank]

I have tried to use compositing mode in vegas to cut an object but it turns out to be a little bit transparant:

http://img242.imageshack.us/img242/6442/image0wy7.jpg

Is there any other ways to cut beside this :confused:

thanks.

[[C22] yrethguad]

The only way I currently know is to use a mask. Go to pan/crop for an event and in the lower left is a check mark to turn on a mask. From there you use the tools on the left to make the mask and then keyframe accordingly.

[BlitzWarTank]

Isn't there another way like auto detecting the background colour then change the background to transparent, and leaving only the wanted object behind?

btw I don't think I have the time to cut a complicated object frame by frame... it will take ages lol.

[Coi]

I would also like to know this.

[[C22] yrethguad]

There is the Sony Mask Generator under FX. Good luck with that though. I used it for the sniper bullet scene in Echo Squad, where the bullet track was rendered with a black background, made transparent by the generator. That was a solid color though.

Combustion can track motion and auto-keyframe for you. That's for someone else to explain though.