Summary :
VLC media player is one of the most popular media players on the Windows platform. However, you may encounter the “this Blu-ray disc needs a library for AACS decoding, and your system does not have it” issue. Now, read this post from MiniTool to find the feasible fix.
Even though VLC has the ability to play blue-ray discs but due to the legal reasons, VLC 3.0 or any other VLC version is not shipped with AACS and BD+ dynamic library as well key database required to open encrypted blu-ray disc. For that reason, every time you attempt to play any encrypted blu-ray disc you will end up getting AACS decoding. When I put the disc in the tray and try to play with VLC I get this error, 'Blu-ray error: Your system BD+ decoding library does not work. Missing configuration? Your input can't be opened: VLC is. Even though VLC has the ability to play blue-ray discs but due to the legal reasons, VLC 3.0 or any other VLC version is not shipped with AACS and BD+ dynamic library as well key database required to open encrypted blu-ray disc. For that reason, every time you attempt to play any encrypted blu-ray disc you will end up getting AACS decoding.
- Libbdplus is a research project to implement the BD+ System Specifications. This research project provides, through an open-source library, a way to understand how the BD+ works. Latest release is libbdplus 0.1.2. NB: this project doesn't offer any key, configuration file or certificate that could be used to decode encrypted copyrighted material.
- VLC 3.0 'Vetinari' is a new major update of VLC; VLC 3.0 activates hardware decoding by default, to get 4K and 8K playback! It supports 10bits and HDR; VLC supports 360.
AACS Decoding
When trying to play a Blu-ray disc through the VLC media player, some people received the 'this Blu-ray disc requires an AACS decoding library' error message. This issue can be found on Windows 7, Windows 8, and Windows 10. Besides, the error message reportedly appeared in multiple VLC versions.
![Download aacs decoding windows 10 Download aacs decoding windows 10](/uploads/1/2/7/7/127768774/512340437.jpg)
What is VLC? Why is VLC so good? What does VLC media player do? VLC is not just a video player, this post will tell you 4 hacks to use VLC media player.
There are two reasons for the VLC AACS decoding issue. Details are as follows:
KeyDB.cfg file is missing – One of the reasons for the “this Blu-ray disc needs a library for AACS decoding, and your system does not have it” error is that the KeyDB.cfg file is missing. This file is required for libaacs library.
Blu-ray discs are protected by AACS and BD+ technology – Another reason for the issue is that Blu-ray discs are protected by AACS and BD+ technology. Therefore, the standard libbluray library is not enough to play these disks.
Then, let’s see how to fix the “this blu-ray disc needs a library for AACS decoding” issue in the next section.
How to Fix the AACS Decoding Issue
First, you need to check the Windows architecture and the VLC installed on the computer. Regardless of your system and VLC architecture, you need to obtain the same key database (KEYDb.cfg) file. Then, you can start to fix the issue.
Warning: The following steps involve downloading some files from a website without an SSL certificate. The download is at your own risk.
Also see: What Is the Difference Between 32 Bit and 64 Bit (x86 vs x64)
Step 1: Visit this link, go to the Keys database, and click Get File to download the KeyDB.cfg file.
Step 2: Then, go to the AACS Dynamic Library section and click the hyperlink associated with the VLC version you are using.
Step 3: Copy KEYDB.cfg to the clipboard. Then, use File Explorer to navigate.
Step 4: Press the Windows + R keys at the same time to open the Run dialogue box and type %APPDATA%.
Step 5: In the open location, create a new folder (right-click> New> Folder) and name it aacs.
![Decoding Decoding](/uploads/1/2/7/7/127768774/423232677.jpg)
Bd+ Decoding Vlc App
Step 6: Open the newly created aacs folder and paste the KEYDB.cfg file. Navigate to your download folder and copy the libaacs.dll file to the clipboard.
Step 7: Use File Explorer to navigate to the location where VLC is installed and paste it here.
Bd+ Decoding Vlc
After that, you can open the VLC media player to check if the “this Blu-ray disc needs a library for AACS decoding, and your system does not have it” issue has been fixed.
Final Words
Vlc Media Player
To sum up, this post has listed a method to get rid of the “this blu-ray disc needs a library for AACS decoding, and your system does not have it” issue. So you can try the method if you are troubled with this error.