I have a greyscale silent video which I would like to generate a reactive audio. I have found many tutorials on 'generating audio-reactive visuals' but can't seem to find any programs or information on doing the opposite. My goal is to create a tonal soundtrack to my video which varies in pitch and volume in accordance to the amount of black, grey and white pixels.
I was thinking I might be able to complete this task by simply finding an appropriate sound, eye-balling the greyscale, and key frame the volume and pitch. My problem with this method is that in parts of my video the visual tone changes are subtle and I would only be guessing at the pitch and volume changes.
I would tremendously appreciate any info or links to any relevant tutorials. I often work between Premier Pro and FCP and was dreaming of a plug-in type program, but of course I understand my desire may be a little more complicated.