If you observe the following when bringing up the Mirakurun container:

Error response from daemon: error gathering device information while adding custom device "/dev/px4video0": no such file or directory
  • Pull the latest .deb package for the Plex TV Card Unofficial Driver:
    wget https://github.com/tsukumijima/px4_drv/releases/download/v0.5.2/px4-drv-dkms_0.5.2_all.deb
    
  • Install the Plex driver:
    sudo gdebi -n px4-drv-dkms_0.5.2_all.deb
    
  • Reboot your machine:
    sudo reboot
    

Updated: