I have a project where I filmed a musician playing live, and recorded the audio separately. The audio and video recordings sync perfectly in post.
For another shot, I played back the same audio recording for him to mime to. When I overlay this second video clip against the original sound file, it drifts out of sync. How on earth is this happening?! How can I solve it in post?
both native audio on the video clip and external audio are at 48000Hz 24 bit.