possible to add your own audio commentary to a dvd?

[apaw]

the commercial dvds have them ....can i add my own audio soundtrack as an optional feature length commentary like family discussing the videos?like i put the dvd in, menu comes up and a choice of main feature or scene selections or view movie with audio commentary(home made)? what stream does the audio has to be in specifics?

thanks

[bugster]

Of course its possible, you just need to use an authoring app that supports multiple soundtracks. AFAIK, the directors commentary tracks are a completley seperat audio stream from the main audio. Generally, you would take a copy of the main audio, set it to low volume level and dub your commentary over the top. The use this as a 2nd, selectable audio track. Like all DVD audio tracks its must be 48Khz, and PCM, AC3 or Mp2 format.

Unfortunatley I can't think of any consumer level authoring apps that support multiple selectable soundtracks. Proffessional level apps like Maestro do if you can 'afford' them!