I have recently converted a whole heap of .TS files to MP4 format. I used the "Video for MPEG4 720p TV/Device" option, and playing back the first few via VLC they all looked OK.
I have since discovered that when played via other players and on various TVs that the audio is missing. One TV reported "No audio channel on this file".
All these new MP4 files do have the audio content because they play back fine through VLC. There must be some flag in the meta data or file header that is incompatible with non-VLC players.
I have used 3 PCs and 3 different versions of VLC and the problem is the same on all converted files.
Does anyone understand this problem, and how to rectify it? Most of the original TS files have been deleted, so this is now a one way street.