I've backed up BD/SD DVD's then used Handbrake for m4v formats w/ 5.1 or 6-channel audio. I need to tag them w/o losing quality. I have used the "Batch Encode.workflow" from the guide yet the m4v files output to 2 channel audio. Setup: ● 2010 Mac Pro 3.33GHz 6-Core Westmere ● LG BD-RE BH10LS30 ● OCZ Vertex 2 SSD (which replaced the BTO SuperDrive) ● External USB Superdrive ● 50" Pioneer Elite ● Pioneer VSX-33 Receiver (supports full audio codecs w/ ~5 HDMI inputs and 1 output to Pioneer Elite) ● AppleTV 2 via HDMI I have made full backups, audio being crucial. Process: 1. SD DVD's w/ Fairmount and BD w/ Handbrake 2. Handbrake to convert ripped backups: → Video: ● m4v H.264 (x264) with "Large file size" checked ● Framerate: Same as source ● Video Quality: Average Bitrate (kbps) 1500, 2-pass encoding w/ turbo first pass → Audio: Need 5.1/6 channel discrete/full quality ● English 5.1/6-channel discrete ● Codec: AC3 (I have read AAC Core Audio is best yet some receivers may not process it) ● Mixdown: 6-channel discrete for full audiobackup (over Dolby Digital II) ● Subtitles: None ● Chapters: Create chapter markers → Standard and Blu-Ray DVD m4v: ● Codec: H.264, AC3, Text ● Color Profile: SD (6-1-6) ● Audio Channels: 6 "Batch Encode.workflow" for tagging seems to create m4v files w/ lower audio quality andbrake w/ 6-channel discrete audio). Attached are example images for the Handbrake and "Batch Encode.workflow": Handbrake m4v: Batch Encode.workflow m4v: Since I want to tag the m4v's with chapter names, movie poster, etc I don't want to re-encode the file to a lesser quality. I have read the guide but have not learned of a way in doing so. Can any one help? Thanks and sorry for the long post, I hope reading it helps others which is why I added a lot of information.