Watching live TV with subtitles on NVIDIA Shield TV Pro

Server Version#: 1.18.0.1913
Player Version#: 7.30.0.16930
Tuner Make/Model: HDHomeRun Quattro
Channel number/Name: any

If I enable hw video transcode, the subtitles don’t show. If I disable hw video transcode, the subtitles are shown but the video stutters every few seconds.

How can I get subtitles for live TV with hw video transcode on the NVIDIA Shield TV Pro?

Screen Shot 2020-03-27 at 10.22.30 PM

The same stream on Synology NAS appears as follows, with subtitles as ‘Unknown (Closed Captions)’ instead of ‘Unknown (EIA_608)’ with the Shield:

Screen Shot 2020-03-27 at 10.34.42 PM

I found the following note here:

Note : In cases where content requires that subtitles be burned in (common for PGS or VOBSUB subtitles and sometimes required for other subtitle formats in some Plex apps), it is not possible to use hardware encoding. That means that the transcoding must be done by the CPU, which may be slower.

Does this apply to live TV?

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