According to DTS patent, DTS is forbidden to play , None of the media player on iPhone/iPad can play DTS.
AC3-DTS Killer can help. It can
1. Auto detect all the movies that contain AC3/DTS.
2. Convert the audio. (As it only converts audio, it will not take you too long time)
Use Sandbox, OPlayer now has been the most secure media player.
You can refer the following by Apple :
A non-sandboxed app has the full rights of the user who is running that app, and can access any resources that the user can access. If that app or the frameworks it is linked against contain security holes, an attacker can potentially exploit those holes to take control of that app, and in doing so, the attacker gains the ability to do anything? that the user can do. By limiting access to resources on a per-app basis, App Sandbox provides a last line of defense against the theft, corruption, or deletion of user data if an attacker successfully exploits security holes in your app or the frameworks it is linked against.
Through several months of effort, we're glad to inform that the release of OPlayer for the Android phones is upcoming, and you can download it from the anroid market at the end of the June. 2011.