I a ripping bluray disc and transforming to mp4 with subtitle. HOW ? I use two softs : 1 - MAKE MKV 2 - MP4 TOOLS - http://www.emmgunn.com/mp4tools/mp4toolstools.html PASS : 1 - BLU-RAY TO MKV FILE - With this soft I select the audio and the subtitle I want. 2 - MKV TO MP4 FILE - With this soft I transform the mkv to avi with subtitle. MY MKV TO MP4 SETTINGS : 1 - I select the MP4 and then : 2 - Video : 1 pass - Audio : AAC5.1 - Subtitle : Burn (hard) I tried the audio with AAC5.1 - it was ok when playing with vlc but no sound with itunes ou quick time. I tried subs with mux (soft) but it didn't work for me.