How works this V12

[kadora]

Hello guys
I have found this video of amazing V 12
but i do not understand how it works because
its camshaft to crank gear ratio seems to be 1-1.
Could somebody add brief explanation?

https://www.youtube.com/watch?v=P_51Rj7SO7M
Thank you

 

[Mechanicboy]

The engine is powered by air pressure hence gear ratio is 1:1.

 

[kadora]

Thank you Jens
I am stupid not to notice it is air powered engine.
I have broken PC sound amplifier

 

[Mechanicboy]

I have broken PC sound amplifier

I am deaf man.