Control Chromecast From Linux / BSD / MacOS

$ export URL="http://ccmixter.org/contests/freestylemix/hisboyelroy/freestylemix_-_hisboyelroy_-_Revolve.mp3"
$ playerctl -p My_Chromecast open "$URL"

This will play a song on the Chromecast.

Ok, that’s awesome. chromecast_mpris, by Alex DeLorenzo