Depending on what quality you need to edit with, I’d reccomend converting the original file to another format before importing – MPEG 2 would work for many projects or perhaps H264?
There are a lot of apps out there for this kind of conversion from the free quick and dirty to the very sophisticated and expensive.
I can recommend any number depending on your final usage rquirements and budget.
Kind regards
Andrew
Andrew Longhurst
The Art of Mix
Is it pixels or pixies that I’m having trouble with?