This is a workaround to watch Blueray rips with Dolby Vision that is normaly not supported by Kodi, there is a modified Kodi (19.4 matrix) .apk
This works flowless for me with Nvidia Shield box using external drive with DV blueray rips...
this complete guide: https://androidtvnews.com/nvidia-shield-dolby-vision/
Link to the modified Kodi: https://forum.kodi.tv/showthread.php?tid=360018
