There isn't a lot of NLE specific information out there on how to properly un-squeeze, and Voldemort's ebook was a starting point for the math that lead to the above solution. There are some assumptions about sharpness and the way one un-stretches that seem a bit quirky or hard to follow, however.

All of my grabs and little vimeo tests and things up this point have been done that way and I am happy with the results. However I'm soon going to be starting the edit on a little feature, and due to my geographic location I have a pretty solid chance of some manner of theatrical projection and I want to start from the ground up with that in mind in the edit.

A couple of days ago I tried what I thought might be a more 'proper' workflow, which was to run GH2 files through 5D2RGB and then through compressor changing the pixel aspect ratio to 1.333. The result was a clip that looked correct, but when I put it in FCPX, I noticed it was slightly taller than my previous efforts. It matched other clips only if I changed their vertical scale to 80 instead of 76. At this height, however, neither match the 'widescreen' button from the plugins, which I take to be a guide for 2.39:1.

I'm wondering which is 'correct' and/or what am I doing wrong, in every case. Obviously, slight variations in squeeze may pass essentially unnoticed, but there must be a 'proper' mathematically correct process for this.

I also at some point of course need to come up to 2k resolution to meet the DCP standard. It's not a huge jump but I'm wondering if I should incorporate that into my initial workflow as well. There were some posts on the BMC forum recently about uprezzing to 4k that were quite illuminating, it seems that the method and amount of color information can play a big role in how well this is accomplished. I've uprezed GH2 frames to 4k in photoshop with pretty good results so honestly I'm not too worried about the jump from 1920 to 2048. Still, I don't know if FCPX is enough, or Compressor might be better, and/or if both the un-squeeze and up-res can be accomplished at once?

Right now I'm looking at:

1.) High quality intra hacked .mts files into 5D2RGB, outputting ProRess 422HQ (unless we think for my later purposes 444 would be better?)

2.) Where to go from here, for un-squeeze and up-res?

Any help would be greatly appreciated. I believe the anamorphic part of the equation should have a more definitive answer than the net seems to provide.