I was sent over here from my post HW Transcoding broken - #2 by FordGuy61.
This helped with only one file of mine with DTS, the 720p movie that only HW transcodes the DTS to a workable audio but the video seems to play fine for at least 5 minutes with no buffering. So counted as a small win…
However, this doesn’t help still with any other HW transcoding on 1080p or 4k files for audio or video HW transcoding it causes buffering every 10 seconds or so. 
