Neo2x said:
Also if I put the contents on a USB it plays as if it were a DVD on my Blu-ray player (languages, subtitles, chapters, etc.).
Finally worked it out.
One thing I noticed was that the muxed files index.bdmv, MovieObject.bdmv, 00000.clpi and 00000.mpls when opened said XXXX0200 and the same files on the original files said XXXX0100, it seems like a version number of some sort, maybe the root of the problem is there.
So now I tried using "AVCHD folder" insted of "Blu-ray folder" as output on TXmuxerGUI and the files generated just as the originals, with XXXX0100 in them, but with 4 less folders (all empty). So just in case I created them, burned the muxed files like I always did with Nero and it finally played!!!!!!