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GPIO triggers, pauses and delays

I have been successfully using GPIO triggers with an optical sensor to advance a slide show in BrightAuthor. Hit the trigger, change the state.

I now wish to play a single video clip on demand. Trigger the sensor, it plays. Trigger the sensor again, it starts over from the beginning. How can I build in a delay interval to disable the sensor for the known length of the video, 3 minutes, for example?

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