刚刚做完 mp4 制作教程 就发现这个问题
I hope someone submit this to apple
https://discussions.apple.com/thread/3965537
Hello.
I find a problem with iOS 5.1.1
I have iPhone 4 iPod touch 4 and iPad2 all of them were updated to iOS 5.1.1
them I found this bug!
open the system app video and play a MP4/M4V moive with single track subtitle.
there is no way you can display the subtitle track.
but you can display the subtitle on iTunes or Apple TV (5.0.1)
If you insert another subtitle track into the MP4 file. them it's OK on all device!
by the way I don't have this problem on iOS 5.0.1
I hope there is a develeper who can submit this bug to Apple!