"Dub" wrote in message
...

snip

Thanks all.

Here is the full link if you want to read it Jerry.

full URL snipped

Well according to that page it's a simple codec issue, something that
you could be faced with in *any* other editors, there are open codecs
(MPG type1, as used in authoring VCD, being the most obvious) and
commercial codecs (Dvix being an example), trail versions of
programmes can have all sorts of limitations due to the non payment of
licences whilst not all paid-for software contains all the commercial
codecs - this is especially true of some of the more recent or obscure
codec. Basically if you need to use a commercial codec that has not
been inclued you need to buy a licence from the codec provider.
Something else the novice needs to be aware of, just because you can
play a file using a certain (commercial) codec it doesn't follow that
you can create a new media file using that codec as there are often
both play only versions and play/write versions IYSWIM.

What you need to check is what actual codec you need, "AVI" is just a
wrapper (as Tony Morgan would say), if you don't have it already then
I suggest you download a copy of Gspot http://gspot.headbands.com/
(freeware), 'open' the media file in that software and then be guided
by the information extracted/given.
--
Wikipedia: the Internet equivalent of
Hyde Park and 'speakers corner'...