I set the 64-bit Windows Media Player as my default player in my x64 Vista Ultimate by changing the regedit.After installed Vista Codec x64 Components 1.54,I found that the Vista Codec x64 Components cannot use the subtitle.I don't know why.
Now I found a hand-set but not automatic way to show subtitle:Windows Media Player-Tools-Options-DVD-Language settings-Advanced-ffdshows-Subtitle-Search in or load File.It's real complicated.
How wish automatic!
