Using 12.0.0 Premier Pro CC. On a Mac OS Sierra 10.12.6.
Brought my 4K footage into Premier and sync'd two external sources of audio with timecode feature in Premier. When I used "new sequence from clip," after right clicking the newly sync'd sequence, everything matched up. However, after making a 1920x1080 sequence and a copy/paste of the 4K audio/video, my sync starts to lag. Both sequences are set to 23.976fps. Not sure why this is happening. The 4K sequence is perfect, but when copied to a 1920x1080 sequence the audio and video drift out of sync. Not using proxies by the way. Help, this is frustrating. Does anyone have a work around or can share their workflow for 4K audio syncing?
This is odd! Sorry for this annoying issue.
Yea, it's extremely strange and frustrating. Everything was shot on canon c300mkii's (internal 4K). I transcoded the .MXF files to ProRes422 in Media encoder. But it was all shot on 4096x2160 (4K). The timecode was off on some interviews so I had to manually adjust. Thinking it was a bug or something I used Pluraleyes, and the 4K sync was perfect. Then after a copy and paste into a 1920x1080, the sync was slipping. It happens infrequently. I tried nesting and that didn't work either. This is my first time working with 4K so I'm new to this workflow. Also first time syncing with timecode. So it's a little new as well.