Since the update to v15 all the mp4s I export on Premier Pro are out of sync (audio/video) ONLY when I play them through Quicktime. They play fine on VLC player. I have not changed any export settings, nothing in my workflow is different and on v14 the mp4s I exported were all in sync.
No, I do not export with variable frame rate, all videos are constant frame rate. It used to work like a charm, but now I cannot play the mp4 on Quicktime anymore.
Has anybody encountered something like that? Any thoughts or help are appreciated.