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Scripting System Streams in DVD Studio Pro, Part 3

Switching audio streams on the fly
Knowing this, I'll now add a third command to my script. Like the second command, this one will be a Set System Stream command, but this time I'll set the stream to Audio Stream 2.



And, once again, I'll click the Compare Command checkbox. This time, the compare command will read: "Execute if GPRM 0 is = Immediate with value 0."



And, of course, if I had any additional streams in my track, I'd continue adding Set System Stream commands for each one of them.


At the end of all this, I need to add one additional command, or else my DVD player will behave erratically, possibly freezing up. The final command will simply be "Resume." In this way, after I tell my player to switch audio streams, it will also know that it should then resume playback of the movie.



Attaching the script to a remote button
All that's left now in terms of the technical aspect of this project is to assign this script to a button on the user's remote control. You do this by selecting the track in the Outline tab in DVD Studio Pro, which then activates the track options in the Inspector palette. There, in the General tab, you'll see a section labeled "Remote Control." This section allows you to assign functions to any or all of the optional buttons on a remote control. So, from the pull-down menu next to the Audio button, I'll select my new script (which is called "Director's Commentary").



You can assign this script to any of the other buttons as well, just in case a viewer doesn't have an Audio button on his or her remote control.

And you're done. All that's left now is telling the viewer how to switch to and from a commentary track, which I'll leave up to you.

Looking for more articles about DVD Studio Pro? Check these.

DVD Studio Pro Scripting, Series 1
DVD Studio Pro Scripting, Series 2
Other scripting articles
General design and authoring topics
If you have any further questions, be sure to drop me a line or post your question in the DVD Studio Pro forum by clicking here.


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Related Keywords:apple dvd studio pro, scripting, switching audio, set system stream, audio stream, alternate audio track

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