Rereading this bug report, I have noticed that I did not explain why bluraybackup should be included in Debian.
There is not any software like this in Debian: you can't make an exact decrypted copy of a Blu-ray Disc Movie. However dvdbackup is included in Debian [1]. dvdbackup is a software to backup DVD-Videos from the command line. I have used dvdbackup many times to make archival copies of my purchased DVDs. Blu-ray is not a format I like, because of DRM, but it is what is going to replace DVDs, eventually. Or at least it seems so. I own some Blu-rays and I want to be able to make copies of them, for archival purposes. bluraybackup serves this purpose very well: it's fast, small and easy to use. Besides, when I am making archival copies, I do not want to re-encode the files and loose quality or the Blu-ray navigation features. I just want to copy the disc, without the encryption. Since Blu-ray has become quite common, it makes sense for Debian to offer a similar program to dvdbackup for the Blu-ray Disc Movie format. bluraybackup could be also useful, if you need to edit files from a Blu-ray disc, but you don't want to re-encode them before the final rendering, to preserve the original quality. I hope now it is clear why Debian should include bluraybackup. -- Matteo Bini [1] https://packages.debian.org/bookworm/dvdbackup