Missing subtitles

No subtitles on some shows. Same channel, some other shows have subtitles.
I can’t be sure, but I think that subtitles are DVB.

HDHomeRun Expand (Firmware: 20161117)
PMS in Qnap TS-851 (Firmware: 4.3.2.0017)
Plex version: 1.4.3.3433
Convert video while recording is set to “Transcode”
Problem channel “Sub”, in Finland.

Does this subtitle missing relate to Plex, or is HDHomeRun?
Is there any way to fix this?

@Toivonen said:
No subtitles on some shows. Same channel, some other shows have subtitles.
I can’t be sure, but I think that subtitles are DVB.

HDHomeRun Expand (Firmware: 20161117)
PMS in Qnap TS-851 (Firmware: 4.3.2.0017)
Plex version: 1.4.3.3433
Convert video while recording is set to “Transcode”
Problem channel “Sub”, in Finland.

Does this subtitle missing relate to Plex, or is HDHomeRun?
Is there any way to fix this?

Annoying, isn’t it. Just found your post. I made a similar one here: https://forums.plex.tv/discussion/282096/pms-1-8-1-does-not-capture-any-uk-subtitles-on-any-programme-yet-the-hdhomerun-software-does#latest

Plex just doesn’t capture the dvb subtitles formats; whereas the HDHOMERUN recording engine does. This is why I use HDHOMERUN app on mac to record my programmes as it does capture the dvb subtitles. I then put the files into plex.