Got another update because I played a bit around.
So I encoded the Video (4k) again removing the 2s of “black screen” to match the HD audio and subtitle files. Now all file from the 4k video match the HD version.
As soon as I simply add the HD subtitles to the 4K file and make them default, the Video does not start. The subtitles are PGS format. If I turn off the subtitles at all, the Video starts and everything works as expected.
These subtitles are working absolutely fine in the HD version.
Any idea what the issue is ?
