You need to have a better understanding of CODECs and compression and how these affect your workflow.
There are lots of CODECs out there. Each optimized for at least one purpose. There CODECs created for CD-ROM delivery, Web delivery, DVD delivery, editing systems, archival etc.
There are CODECs that compress in a variable manner, ie. more complex images receive more bytes with which to store the data – most CODECs perform variable compression. The DV CODEC compresses at a constant datarate.
A 1-minute DV encoded footage will always be the same size regardless of which application that outputs the DV file.
In your workflow, you should look for ways with which to minimize the number of times that you compress your footage. Each time you compress your footage, you will be losing quality, wating time, and lose more hair!
As for your workflow, I suggest importing (you can also copy and paste your premiere pro timeline into AE) the premiere pro project into AE. This precludes having to compress the video before it gets into AE.
Once in AE, you should render out to the CODEC that your editing system is working in. In your case, it’s DV. So, render out from AE to the DV CODEC.
HTH
Roland Kahlenberg
broadcastGEMs
customizable animated backdrops with Adobe After Effects project files