[FFmpeg-user] ffmpeg noise command: How is noise level defined

[Armin Kappeler]

I am using ffmpeg to add noise to my video by using the "noise" command
(Section 9.53 in user documentation). The noise level can be choosen
between 0 and 100, but how is the noise level calculated/defined? (PSNR,
variance, deviation etc.)

Thank you for your help

Armin