The average colour of each frame passed into the program

Needs libpng to process the frames and openmp to speed stuff up.

Use ffmpeg to extract the frames you want from whatever you want to create the image from

./extractframes movie.mp4

This takes one frame per second, but you can edit the script to change that to whatever you want.

and then run it like

./frames2img frames/*

and it will write a png to stdout. one vertical line per frame that is the average colour of that frame.

To save to a file, redirect the output.

I chose to switch to stdout to conform better with the unix philosophy

Come up with a better name/description because this one is bad