Having read this thread over the last couple of days https://emby.media/community/index.php?/topic/58828-convert-recordings-to-mkv-option-removed/ and wanting to try out the Post Processing option in the Emby DVR, for a while, i spent an hour or so experimenting to come up with a basic working method for people to use and amend for their needs.   The current Emby convert feature does not meet my needs and i have several PowerShell scripts i use in conjunction with ffmpeg to process video file