So far, I've been combining source videos using Kdenlive, and then the "multiple alignment files" problem just goes away.
But now, I'm faced with a situation where I want to incorporate a new source into the pool of sources for an identity.
I'm not about to recombine the videos and redo the alignment work, so I figure there should be a way to just have it read multiple alignment files when training.
In the old guide screenshots, I can see there's a "merge" job on the alignments tool, but that doesn't seem to exist anymore.
I had assumed the right way was to just extract everything into the same directory and pass a list of alignment files to the training, but I was reminded the "alignments" option is deprecated.
So, this leads me to two questions:
1) What's the workflow for training from multiple sources (separate videos, for which I've meticulously adjusted separate alignment files)?
2) In general, how come 'train' doesn't actually need an alignment file input? I mean, it MUST need to know the landmarks/alignments for the frames, which it can't just infer from the extracted photos. Does it just infer the alignment file name from the name of the input directory? If so, how do we do multiple alignment files, if the "merge" tool doesn't exist anymore?