Last Updated on December 30, 2020 by Leo Standy

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“This Blu-ray disc needs a library for aacs decoding, and your system does not have it.” You read this because you got a Blu-ray error when trying to play a Blu-ray disc with VLC Player on your computer. VLC is a good player software for Blu-ray content on Windows, macOS and even Linus, but it still can’t play Blu-ra disc that protected by aacs or BD+ nonetheless. Therefore, if you want to enable VLC to play those commercial Blu-ray discs, you must find the valid library for aacs decoding and put it into the right place, so that VLC can invoke it for decrypting Blu-ray content.

More Errors that you May Got when Playing Blu-ray with VLC

What is AACS? AACS is short for Advanced Access Content System which is a standard for DVD and Blu-ray content distribution and digital rights management. Accordingly, with the protection of AACS, all unauthorized access to the DVD and Blu-ray content will be banned. And that is the reason why you cannot play the Blu-ray disc on VLC. Luckily, many AACS decryption keys have been extracted and published on the internet, enabling decoding the AACS protected DVD or Blu-ray Media with third-party software such as VLC. So those extracted decryption keys are the library for aacs decoding that you need when playing Blu-ray disc with VLC.

Where to download AACS decoding library and how to install it to VLC

To fix “this Blu-ray disc needs a library for aacs decoding…” error, there are two files that you need to implement to your VLC.

For
  1. KEYDB.cfg file – this file is used by aacs decoding file.
  2. libaacs.dll – this is the aacs decoding file

Step 1 Go to vlc-bluray.whoknowsmy.name, you will receive the privacy error telling you that Your connection is not private. Click on the Advanced button to enlarge the error explanation tab and click Proceed to vlc-bluray.whoknowsmy.name (unsafe).

Step 2 Download keys database file and AACS dynamic library file onto your computer. You should download the right version of AACS dynamic library according to your system. Since I am in Windows 10 60bit, so I will download the VLC 64 bit on Windows version.

Step 3 Install the downloaded files.

For Windows:

  1. Put KEYDB.cfg in C:Users[Your User Name]AppDataRoamingaacs. You can press Win + R to launch the Run application, and enter %appdata% into the Open text filed. Then click OK to open the directory of C:Users[Your User Name]AppDataRoaming, then Create a folder name “aacs” and copy the cfg into the folder.
  2. Put libaacs.dll in your VLC installation directory.

For Mac:

For
  1. Put KEYDB.cfg in ~/Library/Preferences/aacs/ (create it if it does not exist).
  2. Put libaccs.dylib in /usr/local/lib/ directory (create it, if it does not exist).

Note: since vlc-bluray.whoknowsmy.name has been out of update for years, so please follow our instruction to install those files.

Step 4 Restart VLC and open the Blu-ray disc once again.

Now you probably have fixed the “This Blu-ray Disc needs a library for AACS decoding, and your system does not have it” error. Make sure that you have followed the fix guide carefully. If it doesn’t work. Please repeat the steps once again.

If you still cannot play your Blu-ray movie with VLC. I will recommend you to use a third-party Blu-ray Player software to open the Blu-ray disc.

Best VLC alternative to play Blu-ray disc on Windows and macOS

If you don’t want to see the Blu-ray errors when playing Blu-ray contents with VLC or you just can’t fix the “This Blu-ray Disc needs a library for AACS decoding, and your system does not have it” error. Then a third-party Blu-ray Player software is your best choice.

  • Embedded with all necessary decoding library for playing all DVD and Blu-ray disc, you don’t have to handle with the aacs decoding library missing problems.
  • Play AACS and BD+ protected Blu-ray 1080p/720p HD videos.
Free

How to Play AACS Protected Blu-ray Disc with Blu-ray Player instead of VLC

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Step 1 Install the Blu-ray Player software mentioned above on your Windows or Mac.

Step 2 Launch the Player and click Open Disc on the middle menu of the interface.

Then you are free to enjoy your Blu-ray movie on your PC now.

Besides turn to a third-party player, you have another feasible solution which is to rip the Blu-ray disc to a digital video file then play the video with any ordinary player on your computer. To rip a Blu-ray disc, you need to appeal to Blu-ray Ripper.

The last time, we discussed how VLC was available as a standalone app for Windows 10’s Microsoft Store. It is a basic app that supports every media format out there and is suitable for Windows 10 powered smart devices as well as laptops and desktops. It has features like opening videos and music from local as well as network and online sources. The interface groups all media that it can find in an easy to navigate format.

After you open a video on the VLC App for Windows 10, there are a few interesting control options and features available for us. It is displayed on the bottom part of the screen.

VLC Media Controls When a Media is Open

Here is a discussion of all those control buttons beginning from the left.

  • Lock/Unlock: Locking and unlocking the controls so that we can watch videos without any interference.
  • Loop: Loop the current video after it ends. It will repeat the playback from the beginning.
  • Resize Player: The player will be resized to a smaller one. Double click on the small player to bring it back to full screen.
  • FullScreen: Hit this button to watch your video in full screen.
  • Previous/Play/Next: Switch the tracks between next and previous. Also, play and pause the current track.
  • Subtitles & Audio
    • Open Subtitle: Open up a subtitle that is locally available.
    • Subtitles: Gives you the option to choose a subtitle or download it from the internet.
    • Audio Tracks: Choose an audio track if there are multiple of those available.
  • Player Settings
    • Zoom: Choose between best fit, fit screen, fill, 16:9, 4:3, original and 2.35:1 aspect ratio.
    • Speed: Pick a playback speed between 0.5x to 2x.
    • Audio delay: Delay the audio by -3s to 3s.
    • Subtitle delay: Delay the subtitle by -3s to 3s.
  • Volume: Increase or decrease the volume for the current playback.

VLC Windows App’s Settings

On the main interface, at the bottom-right corner, you will see three dots ⋯ which will give you access to additional options. Click or tap on it and these three settings will appear.

  • Search: Gives us the option to search for music or videos.
  • About the app: Displays the information about the present version of the app.

The majority of the app’s settings are available in ‘Settings’. They are grouped as User Interface, Video Settings, and Music Settings.

User Interface

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  • Theme: Pick a light or dark mode. Choose a color for theme.
  • Language: Pick a language like English, Japanese, Spanish for the app.
  • External Storage: How should VLC react when external storages are connected. It will ask you by default.
  • Homepage: Pick between videos, music or browse in the main interface.
  • Clear save credentials: Clear all the saved credentials.
  • Keyboard shortcuts: Has a list of keyboard shortcuts. It’s different than default VLC’s shortcuts.
    • F – Toggle fullscreen
    • Escape – Leave fullscreen
    • Space – Pause Toggle
    • Add – Faster playback
    • Subtract – Slower playback
    • Execute – Normal playback rate
    • N – Next track
    • P – Previous track
    • S – Stop playback
    • Q – Quit
    • Back – back or goback
    • CTRL + Add – Volume up
    • CTRL + Subtract – Volume down
    • M – Mute
    • B – Change audio track
    • V – Change subtitle
    • CTRL + O – Open a file
    • CTRL + N – Open from network
    • CTRL + Tab – Tab next
    • Shift + CTRL + Tab – Tab Previous

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Video Settings

  • Video Folders: Add a limited list of folders for VLC to search for video files.
  • Hardware Decoding: Turn this option on or off.
  • Force Landscape: Turn it off to also allow portrait display support.
  • Play video in the background: If it is on the video will continue to play when you switch to other apps. Otherwise, it will pause.
  • Use windows 10 pip: Use the player in player mode available in Win 10.
  • System: Pick between UTF-8, ISO-8859-15, and others.

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Music Settings

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  • Equalizer: Use the equalizer sliders or pick a preset. It’s like the one we get in the Android app.
  • Music folder: Limit the app to certain folders for music files.
  • Notifications: Turn it on or off.
  • Connect to Last.fm: Provide user credentials to connect to this service.
  • Reset and reset music database