Should I .....use the 'replace with after effect composition' by 'right-clicking' on each clip?
That's what I would do.
If i export the project (using adobe media encoder) what is a good format to export to because AVCHD is not an option.
Something lossless like:
Lagarith Lossless Video Codec
Ut Video Codec Suite
The Replace with... option is a good one. But if there are a lot of clips from that one 15 minute segment, it might just be easier to do the keying first by bringing the original clip into After Effects, key the entire thing, and export a lossless Intermediate for editing. You'll have to decide which is easier for you.
key the entire thing, and export a lossless Intermediate for editing.
This is also a good approach...
But if your background images might change in editing,
be sure to export an intermediate with alpha channel included.
Doing the entire raw clip in AE is what I usually do but this one is 15 mins (interview was horrible), wouldn't that be a lot of CPU work? My machine is already 5 years old. Plus that would take me 3+ hours at least
Thanks for replies
That's why you have to decide which is the better method. You know your machine and it's abilities far better then we.
My five pennies: keep in mind that you can replace a group of clips with dynamically linked comp, not just one clip.