Once upon a time, home user via users <[email protected]> said:
When I try to play a commercial 4K ultraHD blu-ray movie with VLC,

You can't play a copy-protected UHD disc without a drive with altered
firmware.

Thank-you, Chris.

The blu-ray drive is an LG UltraHD Blu-Ray drive, also labelled (on the box) "UHD Blu-ray WRITER".  Since it is already UHD, I would think its firmware already includes what's needed to handle both UHD and copy-protection.  It does not make sense to me that it needs "altered firmware".

If what you say includes UHD drives, then how do I appropriately "alter" the firmware?

I have a blueray writer as well and I have a whole raft of blueray movies I've bought. These movies play quite happily under Windows using vlc (I believed that was the case but I will need to check that again) so they should play under Linux using vlc. I installed vlc to test it out and after install trying to play the movie produced an error that I didn't have AACS support which was rectified by installing libaacs separately, which begs the question of why did the vlc install not install the libaacs pacakge as well?

I wondered the same thing.  Could it be that libaacs is shared by multiple players?
I installed vlc under Windows 11 but it has the same issue as vlc under Linux, so I looked for Blueray players under Windows and found Laewo Player which has a Pro version and a free Version. Laewo Players seems to play the Blueray videos I have without any issues as it has built in support for the file formats used on Blueray Discs.

Having installed libaacs playing the video again complained that it couldn't find an aacs config file, even though I had gone through the vlc preferences and saved the config, and I have downloaded the keydb.cfg file and installed that into the documented folder in the documented case and now vlc is saying it can't open /dev/sr0, and if I mount the blueray device on disc insert and open the mount point in vlc using open disc vlc produces the same error.

I don't understand "documented case".
I downloaded the keydb.cfg file as specified in the documentation, but that file has the file name in all lower case but the documentation specifies that the file must be called KEYDB.cfg.

I have seen in the past that commercial movie discs can't be played in Linux because of codec licence issues, are we still subject to those issues?

?

I have been told in the past that commercial DVDs etc can't be played under Linux because they require codecs for the encoding mechanisms used that must be purchased hence they will not be provided by Fedora.

The Blueray Burner I have that seems to work under Windows with Laewo Player is Pioneer BDR-XD05TB Burner. The suggested method for getting Laewo Player to work under Linux is to install it under Wine. I've installed Wine and installed the player under Linux, and also installed the Java JRE under windows that the player requires, and it seems to play the Blueray Disc (it seems to play the discs whether the JRE is installed or not, installing it just stops the player from prompting to download and install it). The one problem I have with the player under wine is that the video stops playing every so often which seems to be because it is buffering the source. If I can figure out the buffering I might be able to get it to play the videos properly, I haven't tried turning off hardware acceleration. The other thing that might be an issue under wine is the player is potentially doing interactive conversion of the video format to mkv to play the video, which while that seems to be fine under Windows may be a bit too intensive for wine, hence the pausing of playback.

regards,
BEGIN:VCARD
VERSION:4.0
N:Morris;Stephen;;;
FN:Stephen Morris
EMAIL;PREF=1;TYPE=home:[email protected]
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