Actually ProjectX can demux DVB subtitles ;
http://www.iphonelife.com/blog/87/ho...-mp4-subtitles
http://www.videohelp.com/tools/ProjectX
It seems to work but I get very special colors when I open the sup in SubtitleCreator, I still have to understand how to correct these subtitles.
ProjectX creates sup, sub, idx, ifo and txt.
SubtitleCreator can open sup, sub, idx and ifo, I don't know what is better.
And it seems to be converted in 720.576 while my TS is in 1920.1080.