I gotta call “foul” on this whole “Premiere looks at only frame size and frame aspect etc” If I drop some Panasonic P2 clips onto the timeline they work great, no rendering needed and when I check the timeline settings, they match perfectly (Even labeled as Panasonic DVCPro HD timeline). Now try a ProRes clip and it creates a DNXHD timeline! Wait What? If all clips are the same to PP why does it default to a very specific codec used by AVID? Normally I wouldn’t care, but I edit with my DVCPro clips all the time and NEVER have an issue … I just got through an edit with ProRes (which my FCP handled with no problem) and it was a bear! It was a five minute timeline and it took me nearly 30 minutes to output! I am not on the latest computer, but its a 12-Core Mac with a dedicated NVIDIA card designed to work with CUDA! If I am doing something wrong let me know people, but ProRes which was about the ONLY format I could edit well with in FCP seems to be the WORST thing to use in PP!