Hi! First time video editor here and just hobby-level, really, and I got a copy of Vegas Pro 14. I have two cameras (GoPros) and a Sony recorder for audio. I do the "3 clap" thing and sync my two videos and audio with this clap sequence and everything is fine but several minutes later, I notice that my audio is out of sync with my video. Why does this happen? Do I have to do a "3 clap" procedure every now and again?
I am recording in-cockpit flights so the audio from the GoPros are useless once the engine is running and the Sony records from the aircraft's intercom so I don't know if an in-flight "3 clap" will even be picked up by the GoPros over the engine. My videos are usually over an hour long (no edits).
Any assistance would be great! Thanks!