how to convert AVCHD files on a mac

  bbmf474 10:21 02 Jan 2014

I have a lumix dmc-zs25 and not aware at setuo of the choices for videos AVCHD or Mp4 I have a number of AVCHD files which cannot be viewed by my mac I have extracted them into a folder and they are .mts files I found an apple forum which says iMovie can handle AVCHD files directly but needs a folder needs AVCHD at the root of the filesystem for them to be recognised - I do not know what this means!

Any help will be greatly appreciated, thanks Happy New Year BBMF

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