Subsonic is great and TVheadend too

I'm setting up my server for live TV streaming, and trying to use Subsonic for playing stream from tvheadend...
But that's not so easy !
I tried using script and transcode option, but HLS streaming really doesn't like live stream

I tried using Internet TV/Radio settings too. I can get sound of the TVheadend stream, but no video... Subsonic transcode tvheadend stream in mp3 only (Why it's called "Internet TV/Radio" if subsonic play sound only

So, any suggestions or help ?