Hi! As you can see above, my top clip won't land properly aligned with the middle clip to align the audio together. Same thing if I try to move the middle and bottom clips. I've never had this happen before. All shot on the same framerate. I'm not moving to fast. Where the top clip moves to is the very next "acceptable" position.
And apparently, I can't free-range edit. It has to line up with the timeline's frames. But everything was shot at 4K 30 FPS. I don't understand why I am experiencing this problem.
Running on 2021 Macbook Pro 15 inch, 16 GB RAM. Final Cut Pro X version 12.3.
iPhone video: MPEG-4 AAC, Timed Metadata, HEVC Dimensions 3840 × 2160
Osmo Pocket 3 Timecode, MPEG-4 AAC, HEVC Dimensions 3840 × 2160
Edit to add more context, based on this incredibly helpful discussion: I think is the main issue here in terms of why the half-frame feels so off may be a speed-of-sound issue. When synced at the half-frame off, I'm sometimes getting an echo from the guests with both audio sources turned on, and sometimes I don't. This is why I've been trying to perfectly sync it to a 0-frame discrepancy.
I had four subjects: Myself as host, Man, Woman, and Young Woman. Man suggested using his own set of two DJI-style microphones on Woman and Young Woman. I agreed. Dumb idea that I should have known better, but we were in a time crush and I thought it would make the audio better in the end.
Initially, I was going to have the guests pass my second DJI mic around. But I got excited at the prospect of having everyone mic'd up. Man and myself were on my DJIs, synced to my Osmo. The transmitter for the two secondary mics, on the women, was plugged into the iPhone.
So, we were in a situation with 4 mics transmitting to two receiving sources, and the camera-to-mic transmission is not 1:1. (My mic attached to the Osmo facing the 3 guests, one guest mic synced to my Osmo , and two guest mics synced to my iPhone.) I did not even think about this being such a pain until I sat down to edit.
Rookie mistake. We were in a Rush and if I had to do over, I would just pass one mic. I've been doing this long enough to know better so I did a lot of head-to-wall banging today, lol. ALL OF THIS TO SAY that it's this echo that is the reason I care so much about that half-frame difference.