Hi there.
I just completed training with 128px and now I was thinking on converting with pics at 512px.
How would I do that? merging the aligment files of both 128 extracted faces and 512 with the alignment file from the 'A' video?
I think you're misunderstanding the process. The extract resolution has no bearing on conversion.
The converted faces will be converted at the size that they are in the frame.
I have an aligment file with frames at 128px for training.
I merge that file with the aligment file from the video to have a single alignment file.
In conversion that file uses frames at 128px despite the fact that the original frames could be at 512 pix or more.