Subsonic 6 Video Transcoding for mkv and avi

[skelleton]

I recently upgraded to subsonic 6. In the new version I can only play.mp4 videos in the web player.

When I try to play an avi or mkv, I only get a loading bar with three dots, but the video will never play. The load on the server seems to go up if I start transcoding, so the transcode job is doing something.
There are no errors in the subsonic log. Only a message that the transcode started.

I am using the recommended live streaming command from the website.
I tried with the original transcode setting from subsonic 5.3 and later I changed the transcode to put out mp4
I have also tried the transcoder from the chromecast output post with mkv and mp4 output.
This is the current transcoding command that I am using:
ffmpeg -ss %o -i %s -c:v libx264 -preset superfast -b:v %bk -c:a aac -strict -2 -f mp4 -threads 0 -

a few more details about my environment:
- I am using the tomcat version of subsonic.
- The video folder from the configuration is writable , but nothing seems to get written there.
- My media share is not writable for subsonic
- tomcat is running within an LXC container


Can any of you share transcoding settings that will let me stream avi and mkv videos with the web player?

[skelleton]

Ok the issue is resolved. It did not like the static ffmpeg I was using (even though it worked fine with subsonic 5).

I am now using a somewhat older one I still had and everything is working as expected.