If You have media server and D-Link DSM media streamer, You are not able to playback MKV (Matroska) files. PAL resolution files are easy to convert using MKV2VOB converter, but my equipment didn't work with HD format.I tried and failed long time to fing good probram to convert MKV container into suitable format. Finally I found the product, what really works -- MediaCoder, look http://www.mediacoderhq.com/
Few tips:
Video Tab
Mode: Quality-based 100%
Format: MPEG2
Container: MPEG2
Source: Autoselect
Backend: Autoselect
Copy Video: UNSELECTEDAudio Tab
Source: Autoselect
Encoder: Lame MP3
Resample: Original
Channel: Original
Enable Audio: Selected
Copy Audio: UNSELECTED
Gain 0dB
Audio ID: 0Lame MP3 tab
Rate mode VBR
Channel Auto
Bitrate/Quality: 8
Algorithm Quality: 1
I use currently MediaCoder ver 0,6 and it works just well.