Kodi 17 videos too dark/ high contrast

I’m running Kodi on an Android TV box with an s912 processor.
All videos are too dark and have too high contrast. Any areas not brightly lit are almost black with no detail. That goes for videos streamed and local. When I attempt to adjust the brightness and contrast in video settings it usually does nothing. Videos played through other apps like MXplayer look fine, so I know it isn;t the device. I emailed the developer at the address listed on Google play. I don’t expect any response it’s clearly stated most emails without a log will be ignored.
Any help to be had? I’m about to give up on Kodi as it’s almost useless at present.