I wish more cameras with GPSes supported SMTPE or something to mark the video with a time code. I get the sense that GPS time is accurate to within 1/30th of a second, if not way way more, but even if it just got me in the neighborhood so I could nudge it a frame or two one way or another.

I like recording things like my kids performances with a GoPro or two, and sometimes my wife or I get some shots on our phones. Multi-cam can be fantastic when you have people walking around in front of cameras, for example.

I used to have a majorly hard time syncing the multiple cameras shots, though the last time I did it (a couple months ago) I had much better luck with the "sync using audio" feature, in the past I've had problems. But why can't we have a timecode with the video stream, in the cases of GPS cameras (I think everyt camera I have now has a GPS)?