I have a video file that is from a cultural programme and I want t make a DVD out of it using iMovie. However QuickTime or DivX can only play the video. The sound cannot be played as it is missing the audio codec. The Video is Microsoft MPEG4, and I got that installed on my MAC, but can't seem to find an installable AC3 codec for the sound. I got a zip file which is ac AC3.component file, but I don't know how to install a '.COMPONENT' file on MAC-OSX.
Any help is greatly appreciated.