hi.. how does one compress a large mpeg file to a smaller size mpeg file on a mac? i hv tried divx, which gives me a good result. unfortunately the divx format is not supported by online videoblogs. hence recommend a (large) mpeg to (small) mpeg convertor for macs.
thanx
-thaner

You may want to try the H.264 encoding, which although increases the filesize of a MPEG file, also greatly improves the quality, and in terms of filesize to quality, it's quite good. Another good thing about H.264 is that it's supported by QuickTime, so that means that it's pretty well universally accepted.

Probably the best free all-in-one conversion solution is ffmpegX, which is a shareware GUI wrapper for many of the open-source command line Unix tools. It gives you many different conversion options, so have fun!