Image error when enabling subtitles

[FordGuy61]

Looks like the Intel driver issue with hardware accelerated transcoding.

Hardware Transcoding broken when burning subtitles ApolloLake-based Synology NASes

So far this issue appears to be limited to NAS’s with an Apollo Lake processor. As a stop gap, could those affected please try the following; SSH into your NAS and then remove the new Intel Media Driver (iHD) rm "/volume1/@appstore/Plex Media Server/lib/dri/iHD_drv_video.so" this will cause PMS to fallback to the older Intel VA-API driver (i965_drv_video.so) for HW transcoding. please let us know if this resolves your burning subtitles issue.