Hi, I am trying to fix some problems I am having and by doing so, I am scrutinizing the .IFO files. I notice that when you double click on the "aspect ratio" of an .IFO file within IFOEdit, there is a category that says: CC for Line 21, then underneath that it says Field 1 in GOP and Field 2 in GOP.

I've tested many of my backups and originals IFO's and I've noticed that NONE of the backups using Maestro, (which I've used the option for 16:9 as 16:9 LB/PS in Maestro), have Field 1 in GOP checked. However, many others which are straight letterbox and letterbox backups with IFOEdit, have a checkmark next to Field 1 In GOP. Can someone just tell me exactly why some movies have a check next to that option and others don't? All of my movies are NTSC Progressive. Thanks in advance