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I use Plex to get my video to the Roku, since it will do the transcoding on the fly. That way I don't have to keep two copies of all the recordings. I just use mythlink to populate the folder Plex looks at... I found this format to work well: mythlink.pl --link /var/lib/mythtv/plex/ --format %U/%T/%T\ %pY-%pm-%pd\ %ph:%pi