你那是卡拉ok的vcd，應該是右左雙聲道不同吧。所以，試試在音訊設定的地方改成右邊那個選項(bilingual；二國語言)。

<Audio settings>
Audio input type
If you are using a bilingual source, for example a recording of a bilingual TV program, where the main audio and the sub audio is divided, you can select the settings here. You can switch between the two languages by using the audio switch of the DVD player, or in the audio menu of the DVD-Video.


只是不知你家的播放機能不能切換?!不果不行，就得如樓上所言，先做影音分離。