I had the 20GB mkv before and it played fine, but the AVCHDs are encoded in some peculiar way such that they’re impossible to remux into a matroska container and play successfully. High cpu usage and long delays are common on the players I’ve tried, that’s if it even plays at all. The m2ts files will play on MPC if I have HW acceleration enabled so I have to leave them in that format.
I have re-encoded all 3 Harmy projects from AVCHD to .MKV with a variety of subs and
audio tracks, never had any problem. I used: mkvmerge v8.2.0 (‘World of Adventure’) 64bit
Early on I had one little hang up, when mounting a image with DAEMON Tools, VLC would not
simply play the disc, but would play the BDMV folder inside. Other players can simply play the image as is.