[srean]

Hi madlag thanks for your answer and wishing you all the best for steady. Wonder if a tap or something like that in the beginning can be used to synchronize, much like the clapper in movies. On the flipside that may not be good for usability.

[madlag]

You're welcome and thanks for the encouragement ! Actually, when you get the timings ok you don't need anymore some "runtime" adjustments, everything is fixed in advance. You just have to get the calibration data for every device, of course. By the way, as you said, you can use a clap to synchronize automatically two videos, using just the audio track, but that's another story ;-)