Now that you mention the two versions of ffmpeg, It was indeed the "emby" version people were referring to. I'm sorry I didn't clarify that in my previous post.
I can't thank you enough for all you do for me and the community as a whole. Also, I really appreciate your timely response to this particular issue I'm (and a few others) facing! I love you containers and if one is available, I will use it for a sort of "standardized" folder mapping scheme.