Serviio

It would be great to have an ability to select what audio stream to play. For example in .mkv file I could have a number of streams with different languages. It would be great to be able to select a default audio stream either by id or by language. The other way is to do it like PS3 Media server does - to have a special folder per video file and select streams there. Thank you for considerations.

I agree. It would be awesome! Hope it is possible to add this feature

I agree too. This would be an awesome feature!

Thumbs up on this one! It's the only feature I'm really missing.

Here too ... ability to select between ac3 and dts or between different languages would be awesome !

+1

I don't think Serviio has to do with this issue. Sadly I think it's the media player that has this limitation.
I have a Samsung TV (C-series) with a media player that dosn't allow me to change audio streams
But I have a WD Live player that allows me switch flawlessly

Your request fits to my problem here (I guess):
viewtopic.php?f=5&t=1039

PS3MS allows you to set a preference order for audio track language on the console. So if you like to watch foreign films with subs you could put all the other language codes ahead of ENG. It must do some regexp of the track title to identify them, as I don't believe they would have truly standard names. This seemed to me to be a neat way to do it instead of listing the same file multiple times.

I guess Serviio could have an optional transcode line in the profile which applies to files which have more than one audio track to force a remux keeping only one audio track, based on the preference order. However, you wouldn't be able to switch whilst playing the stream. And the feature would need to be disabled for some renderers that can handle multiple audio streams natively in MKV (like European Sony BD players).

Alternatively Serviio could list a movie with multiple audio tracks as a folder, and inside show each permutation.

Thats how PS3MS is doing it - and my prefered solution.