Is there a way to apply a filter to only an area

[trolltuning]

If I only want a filter to act on an area of each frame of a clip do I need to make a seperate clip and overlay it or is there an easier way?

[stickboy]

That's probably the easiest way.

[canuckerfan]

I'm encoding a 16:9 DVD, and is there any way to make the filters avoid the black bars at the top and bottom? Would overlay achieve this?

[stickboy]

You could use Crop() to remove the borders first, filter, and then add the borders back with AddBorders().

[canuckerfan]

You could use Crop() to remove the borders first, filter, and then add the borders back with AddBorders().
yea, I thought about doing that. but are there any alternative methods?

[Richard Berg]

Depends what you mean by "avoid." Overlay + a mask can ensure that no change is made to the border pixels. OTOH, if you're trying to save CPU cycles, Crop is the only way.

[canuckerfan]

^Got ya. That answered my q. thanks.