Hi,

With respect to the MacOS issue: it looks like it's too old a version of Java. I think that's the "file manager" java object. See if there's an update. Let me know if not.

I haven't tried mac os and don't have one here to try with (it's not like a linux distro) so it's tough to debug.

With respect to the 'passing commands to mencoder' ... go to the File menu and select Error Console then turn on Enable Full Tracing. It will show the one (or more) commands. I could probably add a 'custom' commands thing but as you note editing the config file works fine as well would be my guess.

Mark