I found the following just now threads and posts (quoted below). So it appears HW transcoding may work on client devices, just not on the Shield itself. Although there was no final confirmation from an impacted user who had the HW transcoding issue with their iOS Plex client, to which Plex advised the user to disable the option to automatically adjust the quality and see if that resolved it or not.
The user had since downgraded to PMS 1.24, which was working fine for them, so they could not confirm if disabling the option.
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Sorry if I wasn’t clear. Let me clarify.
Shield Experience 8 (Android 9) - HW transcoding is broken with PMS 1.25.x but only when playing on the Shield itself. There should not be HW transcoding issues playing from other clients. If you have this, please provide logs so I can investigate. I have not been able to reproduce any other issues myself. I can confirm this issue on the Shield itself. There is some issue with ndkdecoder being used by both PMS and the client app at the same time.
Shield Experience 9 (Android 11) - HW transcoding broken for all transcodes regardless of what version of PMS you are using. This is an issue with Android 11 we are investigating. Once we resolve the Android 11 issue, we still need to address the 1.25.x PMS issue. Although it’s possible fixing Android 11 will also fix this issue. We still need to fix it for Android 9.
