As the winter kicks in I might start converting some old movies to play back on Apple TV.
If you have some movies multi file movies that need joining together to make one file then the free utility avidemux2 will do the job.
It won’t run on OSX Mountain Lion, why (can’t find my question mark)
To make your copy of avidemux2.app work on Mountain Lion, simply open the application bundle (show package contents in finder) and remove the files libxml.2.dylib and libiconv.2.dylib from the Contents/Resources/lib folder.
This will make avidemux2 use the versions that shipped with Mountain Lion and work just fine.
NOTE> I use Smart Converter PRO available in the APP store for the same price as a good beer!!