Originally Posted by HD_Tech
Does anyone know if the BDP-62FD is able to play multichannel FLAC audio inside a .mkv container?
I seriously doubt it... but, you could try using Serviio and setting up a custom filter to transcode to multi-channel LPCM and I am optimistic that it would be able to play that.
...or... instead of .MKV, put into an M2TS container, audio-only, as transcoded DTS and it will play back native.
I would think about trying that myself, but the only multi-channel FLAC files I have are DVD-Audio rips and I have all of the original optical plastic, so I just spin the disc.
EDIT: but, if you want to do this with your Blu-ray and/or DVD concert collection (a guess), rip the disc as a lossless transfer to (again) an M2TS file; then, stream to your BDP-62FD with Serviio and you will have audio playback with no loss of channels or audio quality. Google something called 'DVDFab' to get started.