Is it possible to stream MKV over DLNA? Some say yes and some say no. Most of the time people get no luck when trying to stream a MKV file from NAS to DLNA certified TV or HD media player, but it does work for some guys. Why should this happen? Basically, with DLNA media devices there are certificates given to each product that receives DLNA approval. The problem is that .mkv is not one of the media options that are categorized because it's not a sanctioned format (not like WMV, MPEG, etc.) Besides, MKV is a flexible container format which can store just about anything (H.264, DivX, MPEG, any sort of audio, even menus and subtitles) while
WMV, MPEG is more or less complete formats so they know what to expect while with MKV's you really can't tell without checking the contents itself.

Although most people meet with very limited success streaming .mkv files from NAS to a TV, it is reported that many have good luck when streaming H.264 .mkv with AC3 audio. DTS audio in .mkv may results in av sync problems so it is advised to be converted to AC3 or AAC before streaming MKV. Anyway, the best way solving this problem is streaming .mkv while transcoding the file on the fly with media server like Tversity. Despite that, you may receive error message when streaming .mkv to the DMP (Digital Media Player). In that case you’re suggested to convert .mkv to DLNA sanctioned format, e.g. H.264 .mp4. The following guide tells you how to convert .mkv to H.264 .mp4 video with AAC audio included. Continue reading »