divxz:
There is now an osx version that *may* / *might* work if stars are in correct positions and gods willing. So, if you have the interest to test it out, you can do so here:
www.helsinki.fi/~konttori/MediaConverterOSX.zip
Ok, if that isn't working, then I'll try to get access to a mac somehow and test it out there. I've bundled OSX mencoder there, but without a mac, well... No way to be even sure if the mencoder works, let alone be sure if I have modified the call to the encoder in a correct fashion.