Codec subtitle and automatic conversion issue

I have Plex running on a Synology server (ds918) and play it through a Nvidia shield on my TV

When I start a movie (I have it always automatically select Dutch subtitles) it plays with what looks like a codec issue (see attached pictures)

When I change subs nothing changes
When I stop subs nothing changes
When I stop subs and stop automatic conversion (select original qual) it plays normally

Anybody am idea where this is coming from, what to do to do get to the bottom of the issue and how to solve it?

There are also two types of srt’s; internal and external. The external get the issue above, the others just don’t show any subs at all…

There is currently a problem with hardware accelerated transcoding and an Intel driver. Plex is working with Intel on a fix.

One workaround is to disable hardware accelerated transcoding.

Second workaround is to delete the offending Intel driver.

These threads have additional info:

Why do you have Video Quality / Adjust Automatically = On?

That can result in transcoded video.

If you are streaming from a local server, you should not need it.

Try setting Adjust Automatically = Off and Home Streaming = Maximum.

That will give you a better chance of direct playing the movie/show, and less of a chance of running into the the transcoding bug.

Also, the video quality will be better if you direct play. Transcoding reduces video quality.

Unfortunately whatever I do it keeps on automatically transcoding. What settings and where do I change to ensure it does direct play?

Thanks! Will try those

Plex app on the Shield, Video Quality section:

Thanks. Solved it indeed for now!

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