Serviio 1.2.1: external subtitles do not work

I have posted this text in another thread: http://forum.serviio.org/viewtopic.php?f=5&t=10326&p=71965#p71965
But I think a dedicated topic is more appropriate.

Here is the context and the problem:

• I have two Upnp renderers: 1 Android tablet running UPnPlay and using MX Player (or VLC) to play videos, and one Internet Box (freebox) using both the Generic DLNA profile. I have a video-projector so no TV firmware problem...
• I have Serviio installed on a FreeBSD server, using the exact same ffmpeg version (1.1.1) and compiled with the same options as those indicated in the Serviio wiki.
  I have minidlna installed on the same platform, so I am sure that my test files (1 mkv, 1 avi and 1 mp4 files with external srt) work perfectly with my renderers without any transcoding.
• All features are working except for subtitles based on external files . There are no trace of error in log files. I have tried all possible configurations into the Serviio console as well as several versions of ffmpeg and several compilation configurations, but I can't figure out where the problem is.

Interesting fact: when I turn subtitles hardcoding on with the option "only when needed", subtitles are OK (but my processor is too slow to provide a descent frame rate, so I cannot use that solution). So maybe the profile I use (Generic DLNA profile) does not allow subtitles with external srt files?

[Illico]

Generic profile deliver subtitle resource with mime-type="text/srt".

What is the mime-type of subtitle resources with minidlna server ?

[zip]

Can you try it is Samsung or Viera profiles?

Hi,

Thanks for your quick answers.

@zip I tried the suggested profiles, it's not working on my Android 4.2 tablet. I'll try later for my other renderer.

@Illico: I can't say. Do I have a simple way to check this out? There is nothing in minidlna config file nor documentation about about it. Btw, I tested with .srt and .ass files with several encoding.