Work from a single system using only internal drives.
I have attempted to duplicate your issue. I took a 4K video, added it to Premiere, right click - Proxy - create proxy - used the QuickTime format with Preset: 1280x720 GoPro Cineform.
It created the proxy and attached it to the 4k footage.
I then copied the project file, the 4k clip, and the proxy to my laptop and opened the project. The 4k file was there with the proxy still attached.
I also was never asked to relink, I wonder if you could keep the path the same if that could resolve the issue? Perhaps in the act of re-linking it's doing an extra integrity check that is causing the hangup.
Worst case scenario you could create a new 720p preset without audio (assuming your originals do not have audio) and recreate your proxy files and attempt to reconnect those. That would certainly be faster than a re-edit.
Thanks for the reply!
So the difference is I did NOT put the original media on the portable drive. Only proxies. Under the impression it'd be possible to keep working with the same master project file and just reconnect the original media when it was available again. This way I could take the project mobile and what not. People tend to do this, I think this feature of the audio channel discrepancy is cramping my style that's all.
4K DCI (4096 by 2160) R3D transcoded and attached as 720p ProRes LT within Premiere itself with a custom ingest setting created in AME. I manually copied the Production Sound, Proxies and project files on a portable drive but didn't clone the folder structure since I just did it manually, which is why I have to manually reattach the proxies.
NOW I've actually managed to attach the proxies by doing it manually clip by clip (ugh) BUT my merged clips are still offline!!
I've known that you're supposed to create proxies BEFORE merging your clips for the very reason that merged clips can't have proxies, but I assumed there was a way for me to work with proxies and no original media connected yet this doesn't seem to be the case if no merged clips can be attached to proxies. How is that supposed to work? Do I have to sync sound and render out merged clips as proxies in AME?? Ideas?