A collection of scripts which I've written for various tasks related to solving the mysterious ufsc videos.
More info about them at https://www.unfavorablesemicircle.com/

Maybe they are poorly written or messy, but I've found use for them at least.

The procedure for making a composite is as such

• First we download a video using youtube-dl, organize as you wish.
• When we explode the video, we want to pad the numbers of the images with 0s to make sure the order is correct.
  • ffprobe -v error -count_frames -select_streams v:0 -show_entries stream=nb_read_frames -of default=nokey=1:noprint_wrappers=1 input.mpg
  • This gives us the number of frames, for example 1928, which is 4 digits long.
• We create a folder for the keyframes: mkdir keyframes, then explode the video: ffmpeg -i input.mpg ./keyframes/image%04d.png . Here we use %04d to pad with 4 digits.
• We use makecomposite.py to create a composite. It looks specifically for images named 'imageNUMBER.png', but there are options to change the regex it uses to lookup. It takes a width argument and pads the last row with black if needed, so see if the framecount gives any hints.
  • cd keyframes; ./makecomposite.py 128;

There are various other scripts for stuff I need to do as well.