I have a slightly better understanding of how subtitles are handled. I have read the logs and can clearly see where the subtitles are extracted and placed into the temp folder (in the .sup format). The are are no errors reported but the resulting BD folders I have created do not have subtitles in them! I believe the part where it is failing is with tsMuxer as I have tried to manually add the audio, video and subtitle tracks but it says the subtitles are an “Unsupported format”. tsMusxer is version 2.6.12.

I have tried multiple HD-DVD sources and the same thing happens.

Any ideas?