Convert mythtv mpg to divx

[dpl]

I have a fully functioning mythtv box, but my hard drive space is somewhat limited. I would like a script that will convert the large (2.2gb per hour) mpg files to divx or something equivalently small.
I can write a script to get the conversion all done, but what I don't know is how to get the tv show name from the file. Currently it is a bunch of numbers ending in .mpg. I know part of the number means the date, but is there a way to decode the rest in a way that would fit in a script? Or, is there something that someone has already done that I'm overlooking? I did a quick search on google, the gentoo forums as well as gentoo-wiki, and mythtv.org, but I'm coming up with nothing.
Any links that I missed or suggestions?

Thanks,

dpl
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puto risi vidi

[mar_rud]

Look at nuvexport.
It's a bunch of perl scripts to convert episodes from mythtv to multiple video formats (xvid,divx,dvd,vcd,...). Unfortunately, latest version of ffmpeg has some changes not handled by nuvexport and exporting do xvid doesn't work (unknown codec), but You can look into scripts, as there is what You want (episode names etc.).

[Hobbes-X]

mythtranscode is built into myth, and would achieve part of what you're looking for. You can cut out commercials marked by the commercial flagger, or by putting in flags of your own and then transcode them to MPEG4, which makes things much smaller in my case. Animated half hour shows go down to about 400MB, full hour live-action shows generally end up as about 950MB.

It all depends on the settings though, check out the Removing Commercials page on the MythTv Wiki.