i got a friend to do this for me (i'm just a colourist....)
it is called aditc and it outputs the first value of the timecode track to stdout so you can use it in scripts.
i've used it in scripts to do "any old Quicktime">dnxhd (using ffmpeg)>avid mxf (using writeavidmxf) with timecodes intact. it was great for movies off little cameras.
I think metafuze (as of yesterday...) may make all this unnecessary but it was fun learning anyway and this my stuff is all native on mac os x (powerpc or intel)
correct use is
this will then put out the timecode to stdout eg
if it finds no timecode track it will add one with the start timecode 00:00:00:00 (I'm in PAL land here so its non drop frame) if anyone's interested i could do a 2997 drop frame version (or post the source code somewhere....
here is the powerpc version
the intel version will be next week when i'm back at work with a newer mac!
hope this helps someone