Serviio

Hi.
I cannot select subtitles or change audio format (from Dolby to DTS) on my bluray player BDP S-590 on mkv file (that inside has the subtitles and DTS and Dolby Audio files).
I push "Options" button but it shows nothing. With Server Media of Synology i can select subtitles and audio format.
How can i select on Serviio https://trackeasy.fun/usps/ https://showbox.tools/?
Thanks
I installaed serviio on my NAS Synology DS213J.

What profile are you using for your BD player? Look on the Serviio console on the status page and see what was assigned. There hasn't been any updates in the Sony profiles in quite a while, so it's possible your player has been assigned one that is less of a match. I don't use a BD player any more for streaming, but I do have an older Sony BDP-S3500 player. I used the "Sony BDP-Sx100 (2013)" and it allowed changing audio and captions.