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After I flash the wh14ns40(after 2015), read 4k UHD disc, then write it back to a BDXL rw. Can I play this BDXL disc using a 4k UHD player like panasonic ub-420?

Slight chance, with a lot of work.

MakeMKV isn't going to make an ISO you can burn. A licensed player is going to execute the code embedded in the menus of an image anyway, and reject the copy.

Not to mention that the LG-based drive probably will have issues with writing a multi-layer disk.

If the LG based ROM can't write multi-layer disk, also can't make a backup UHD disc. For the UHD, we only can use to play the original film?

Woodstock wrote: ↑

Thu Feb 10, 2022 11:11 pm

Slight chance, with a lot of work.

MakeMKV isn't going to make an ISO you can burn. A licensed player is going to execute the code embedded in the menus of an image anyway, and reject the copy.

Not to mention that the LG-based drive probably will have issues with writing a multi-layer disk.

Theoretically, the LG can write multi-layer disks. In fact, LG and Asus sell them as having that capability. Apparently (I haven't tried it myself) the biggest issues are during the layer transition, or rather making the drive slow to the correct speed to not screw it up. It applies to writing much more than it does to reading.

The reality is they are not as reliable at it as the competing Pioneer drives. And the new MakeMKV capability to use Pioneer drives for LibreDrive opens additional possibilities.

Writing a player-compatible disk will depend on burning software. While MakeMKV will write out the directory structure and files when you use the Backup function that BD-aware software will recognize, there are still parts that have to be created to build a new optical disk that meets the standards hardware players will accept.