They are working on version 2.6 and, as usual everywhere these days, they are shorthanded:

http://avidemux.org/admForum/viewtopic.php?id=8281

If I could do more, I would, but I am a user, not a programmer.

Looks like the it's going to be much more versatile and it will have the "watermark" feature back in the Linux version.

Just thought I'd post something in case there's anyone who wants to assist.

Thanks!