Be sure to restart makemkv after any edits. Hopefully in the future, an error messages about "volume key not found" can show what the current volume key is for the disk so we can double check in our keydb.cfg files and/or google search for them easily. I realize we're on the bleeding edge of making this work, and all the tools will likely need a few iterations to adjust to new features and technologies. For me, I have 2 primary purposes:
- backup disks before they go bad. These suckers are expensive! And they go bad just like regular dvds and blurays. I got this on the 2nd disk I tried:
Error 'Scsi error - MEDIUM ERROR:L-EC UNCORRECTABLE ERROR' occurred while reading '/BDMV/STREAM/00015.m2ts' at offset '31950237696' - access them on my home theater system with Plex so I don't have to change disks. I want it all - hdr10/dolby vision, 4k resolution, and dolby atmos/dts-x sound.
- For my asus 16x drive, it takes ~1 hour 20 min to backup a disk. San Andreas is 60GB.
- On some disks, the "top layer" read goes quickly, but at half way, it drops to 2x to read the lower layers, and this takes most of the time.
- Of course, once I saw this with 2 4k disks, the 3rd one was different. Labyritnth is 6x across the last part for a 37 minute read. Perhaps the disk is different or compressed onto 1 layer?
- If I ask makemkv to create a .mkv file from the backup, that's about 45GB compared to ~5GB for handbrake on a 2K movie. I haven't tried handbrake yet on a .mkv file, but have heard there were plenty of issues involved. Once they are resolved, it's likely to have a much smaller size. (good for backup storage!)
- The makemkv backup folder doesn't seem to call out hdr10 or dolby vision vs. non-hdr. I don't know if it's even possible. Downstream quality is a bit washed out, I think some of my tools don't know how to handle hdr, this should resolve itself.
- The makemkv back folder (when viewed by makemkv to create a .mkv file) also doesn't show the dolby atmos audio track. Darn! I see 7.1, 5.1, etc. Does anyone know if the data is captured and that future versions of makemkv will be able to distinguish it? Or will I need to rerun my backup folders? If the later, I'll probably hold off for a bit other than run a few experiments.
- Trying to view a .mkv file via plex or vlc on the same pc that might be transcoding it is poor - it stutters quite a bit. If/when we can get the metadata right on these things so that no transcoding is needed, hopefully it will speed up. This is on the 4 core/8 thread 4ghz i7.6xxx generation processor. Has anyone found this faster on a 6 core or threadripper?
- Plex transcoding the 4k file to 2k on my tablet works very smoothly.
- Plex playing the 4k mkv file on my roku to the big tv works ok. It claims it's a 4k file, but after playing it, I see it's playing 2k. In options I can switch the stream to 4k and verified on my receiver it's 4k. yay! Audio says 7.1, so I didn't get the dolby atmos track somehow. (darn, but not surprising) I noticed 1 stutter in ~10 minutes of play. One time I tried it, roku said it could not play this file. BUT despite all this, I thought it looked and sounded good. Later on I'll try the TV info screen and see if it somehow is getting hdr ok.
