I want to know how can i achieve the effect of cutting a picture as it goes behind an object, such as a wall or anything else that's in the foreground.
Put objects you want to be in the foreground on a video track that is above the track the picture is on. Unless the foreground objects are something that doesn't have to use transparency, like another video clip, make sure the foreground objects have a transparent background. For instance, if I put an image of a tennis ball on screen that does not have a transparent background, I'll have a white or black square around the ball when I drop it into vegas. I'll then have to figure out how to remove the white or black background with compositing or chroma key methods. Using imagery with a transparent background (alpha channel) makes life much easier, the tennis ball will appear over the other image in the background with no extra work needed.
You can then use the overlay tracks' "track motion" button (in the track control panel on the left side of each track) to scale and move the overlaid images around. You can also keyframe those movements using the timeline at the bottom of the track motion window. This will enable you to animate objects moving around or changing size/shape.
nono, i mean behind the object that's part of a video that i'm editing, something i cannot work it but as whole. I.e there's a street lamp and a man passing by, the street lamp is in the foreground and the man in the background ( both from the same video source ) and i want to change the man's face with a picture but i don't want to picture to move over the street lamp but behind it.
You have to mask it very carefully, pretty much frame by frame.
i managed to do something similar with panning by disabling the stretch to fill and working simultaneously with track motion
This is the highest quality (and fastest) approach. This plugin is available for Vegas and comes with the Vegas Pro 14 Suite (I know mocha does, not sure about the pixel chooser).
This is the highest quality (and fastest) approach. This plugin is available for Vegas and comes with the Vegas Pro 14 Suite (I know mocha does, not sure about the pixel chooser).
wow, that tool is amazing. However, i'm not really looking for such quality editing as i have multiple objects in the scene that i have to edit as i described above and it would take a shit ton of time to do that for each one in particular, but thanks anyway, surely it'll come in handy sometime.