謝謝 花轟 的回覆

我把 MPEG 檔以 File -> MPEG Tools -> De-multoplex 分離為 .m2v 及 .mp2 後，再「合成」時出現以下訊息...

You are trying to create MPEG-2 file
To playback MPEG-2 file, DVD player software needs to be installed on your system.
MPEG-2 files can not be played without such playback software.

它似乎是要我先安裝 DVD 播放軟體。如果是的話，我已安裝有「PowerDVD 4.0 xp、InterVideo WinDVD、Windows Media Player 7.1」。請問：我該如何解決？