If the new file doesn't play that is probably something to do with whatever mediafile player you are using.
Yes it is part of MKVTool - look for a file called mmg but I'm not sure what it is called in the MAC package - however it sounds like you found it anyway as you are correct to add the file and then add the ass file and mux. I am trying to find MKVMerge - is it already part of MKVToolNix or do I need to download it separately? Thank you sooo much for all your help. I saw that someone said on this forum to use handbrake to hardcode but I didn't know what to do once I opened the handbrake program and added the. mkv, but when I try to play this file, it doesn't play (not sure if that's the point of this file though). ass subtitle files, and then hit 'start multiplexing' - I left every setting on whatever is on default. What I tried was click the 'add source files' button, add the. so sorry, I'm not the most tech-savvy person in the world so could you possibly help me walk through? for MAC It won't hard code the ass but it will be switchable but you can make it default and forced in MKVMerge Thanks very much for the reply. Put the TS file in a MKV container along with the.