[Dino]

I believe this has been a long standing quirk with Final Cut and other apps as well. Guess that make it more of a QuickTime issue. I often see this where a clip is fine in FCP and even After Effects sees it properly but QuickTime often reports an incorrect frame rate. I’m glad that it is finally showing as a real issue rather than something that just gets a shoulder shrug (not that I’m glad you are having a problem).

As to the decklink qualifier being added to the codec identities. This has been the case for sometime as well. It is annoying at the least and downright infuriating at times as the true identity of the actually codec is obscured by whatever the decklink QT components are doing. As in what is reported by QT isn’t necessarily what the true codec is. Opening the clip in After Effects usually gives the proper info. I have no recent experience with AJA products to know what happens in that case.

After Effects tends to be my goto for anything that is strange, obnoxious or overly vague (complicated) in the Final Cut suite .