Serviio

Anyone have a profile for Xbox 360 that uses h.264 instead of wmv/asf for transcoding?

Serviio ships with ffmpeg that doesn't include h264 encoding. You should be able to remux h264 content (e.g. in mkv) into mpeg2ts, but according to this article it only plays h264 in mpeg4 container, which is not suitable for streaming (afaik), ie it has to be fully transcoded before being able to be played.

That would explain it then, thanks