Ffmpeg

Here's how you can get ffmpeg into your system now:

1. download VCD & MPEG Tools (Make sure you get the one "for Mac OS X"). Note: it says "15 day trial" but that does NOT affect kJams. However, I do encourage you to buy it anyway, it's a great tool for converting any VCDs that you run into.
2. mount the disk image (it should mount automatically, if not, double click the .dmg file)
3. drag the application to your "Applications" folder.

That's it! You're all set, you do not need to restart kJams. kJams will "just know" where to look for the application, and it will dig ffmpeg out of it and use it.