I am looking for a simple batch watermark software for Mac, but all of them seem to be in windows.

I know I can add before I export, and I know I can use QT for MOV files.

I have mixed files that just need a watermark in post production.

I am using ezs3 which can add watermarks, but not to HTML5 on mobile devices as well as downloads. So I just want to make it simple.

I know there are some video converters that do that, but I am really just looking for a simple app that just spits out what I put in it, but just encodes a .PNG watermark on it.

Any thoughts?