Currently I know only of two ways to get subtitles to appear on my TV when it's connect to my TF700 via HDMI cable, and they are:
1) Disable hardware overlay via the developer's options menu, OR
2) Use software decoder instead of HW
For me, the latter option is completely useless since I'm watching 1080p files. The first option is OK but still not ideal since the image that I'd get on the TV is simply a mirror of what is on my tablet, and hence I'm not getting a full screen picture and also the quality does still suffer a bit (e.g. lags, stutters, etc.)
I've searched the net for a solution, but basically everything that I've read so far suggests one or both of the solutions that I've listed. Is there really no way to get the tablet to send the subtitles over HDMI??? I highly doubt this since whenever I first play the 1080p file, I would get a very quick glimpse of the subtitles just before it disappears entirely.
To me, this almost seems intentional, and is very frustrating...
If anyone knows of a suitable solution, I'd love to hear it.