I've been frustrated with being unable to watch the M4S2 video format my Pentax Optio s5z (an otherwise nice camera) produces on my Mac laptop. Several multi-hour long sessions trying to convert it into a format that displays under OSX Quicktime met with failure, until tonight, when I discovered that Casio makes a tiny codec for the Mac for their cameras, which also happens to work for mine.
Woohoo! (and, for the record, the complexity of video formats is pretty insane)
For the record Casio just updated the component to version 1.1 which is a Universal Binary!!!
http://world.casio.com/qv/download/en/avi/dl.html
It should work for any camera with M4S2 format video, it's just a codec that allows you to view this type of video. I can even watch them in iphoto as it imports them!
I have been looking for a solution to this problem for weeks and your blog entry was thrown up by Google today! Problem solved - thanks
Simon