IT'S NOT THE CODEC. IT'S THE PROGRAM.
NO MATTER WHAT CODEC I CONVERT TO (going to try Media Encoder next), NOTHING I IMPORT TO PREMIERE IS COMPLETE, NO MATTER WHAT METHOD I TRY.
SOME CASES, I ONLY GET AUDIO
OTHERS, ONLY VIDEO,
RARE CASES, BOTH.
I'VE UPGRADED TO THE LATEST VERSION, AND IT'S STILL DOING THE SAME THING.
AND (get this) IF I IMPORT TO AFTER EFFECTS, IT WORKS!!! FULL VIDEO, AND FULL AUDIO!
Thank you, and have a pleasant day.