Using MPEG tracks

If you have MPEG 1 video files, you can import them into an MPEG track. The MPEG track is for adding MPEG video, not for MPEG audio, such as .mp3. Use a sound track for MPEG audio.

You add an MPEG track to your movie by dragging an MPEG Track icon from the QuickTime set  of the Objects palette into the track list area of the Timeline Editor. (See Adding tracks to movies.) After adding the MPEG track, you can set basic properties (see Setting the basic track and sample properties).