The cameras are mobile phones or GoPro's
They are not connected to the Arduino
It doesn't matter where they are pointing at any time. The pan / tilt function from the stepper motors will point them in different and random positions.
I will look at and edit the footage later, so it will not affect the use of the Arduino or the motors in any way.
I am using MIDI to instruct the Arduino what to do, because I am familiar with MIDI, and will sync the movements to sound. I do this from a computer.
The arduino will run a MIDI IN function in the loop listening for MIDI messages
The baud rate for MIDI is 31250
For example, I will send a NoteOn message for a note like middle C, which is 60, and there will be a function for that case, like move motor_pan 200 steps to the right at a certain speed.
My concern is that it will be too much for the Arduino to do this for 14 motors at the same time.
The MIDI can handle it, and the Arduino can handle the MIDI, but maybe all this stepping information at different frequencies will be too much.
I hope this explains more why I am wondering if one Mega will handle this, or if there is a better solution.