“won’t it be necessary, in an editor (eg. Premiere), to have, at one point, all the footage on a single timeline?”
Perhaps…but that will simply to allow you to provide a final output as one single file, which may or may not be necessary – and that would generally be done only after all of the logical pieces have been completed as separate entities.
My point is that if there are serious budgetary concerns that may limit the magnitude of the editing machine you can build(or buy), then you may not need to think in terms of the length of the full program, but only on the lengths of the contiguous pieces. Editing 100 minutes of footage on a single timeline for several months would take much more computer power than editing twenty separate ‘five minute scenes’ for several months, then piecing them all together on a single timeline for a final output.
At any rate, it would be a rarity for a ‘feature film’ to be edited, composited and graded on a single machine.
Steve Brame
creative illusions Productions