I'm running gource -1280x720 --seconds-per-day 0.001 --hide filenames,progress --dir-name-depth 1 --highlight-dirs --highlight-colour FF00FF -r 25 -o - | avconv -r 25 -f image2pipe -vcodec ppm -i - -pre libvpx-720p -b 5000K -an -y test.webm but really the directory colors don't change from white.

This can be reproduced with the repo https://github.com/trilinos/trilinos.