(UPDATE: Fixed with KeyDB Helper!) True Lies 4K UHD reporting "volume key is unknown" error

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HurlyGurly
Posts: 1
Joined: Wed Dec 24, 2025 8:38 pm

(UPDATE: Fixed with KeyDB Helper!) True Lies 4K UHD reporting "volume key is unknown" error

Post by HurlyGurly »

UPDATE 12/25/2025: Happy Christmas to all! I had found a post by SamuriHL (viewtopic.php?p=166510#p166510) with instructions to use their KeyDB Helper tool. I installed the tool and used the "Synchronize" option first, then used "Disc Info" to check my disc; here's what was reported back:

Code: Select all

Getting disc info...
Validation Data: 5F62AAAC93836BBDB5A903B01C097615 [FOUND]
Media Key: 3DDEA57E5D7C6102C1D0F01634C8B294 [FOUND]
VUK: 763B3E481D317D2D65758B435BBAE027 [FOUND]
Encrypted Unit Key: 33289603BF4CA866907A91AE610DE1B5 [FOUND]
Decrypted Unit Key: 1B1F466724AC224932444A956AE78D2C [FOUND]
Unit Key(s) tested with 3 aligned units : [VALIDATED]
------------------------------------
[(Disc Info)]
[DiscID]: 0x5846890EF0240BEBB84DE1620CE8C9D547026FE9                   
[Volume]: TRUE_LIES
[Title]: TRUE LIES - Ultra HD™
[Date]: 2024-01-11
[MediaKey]: 0x3DDEA57E5D7C6102C1D0F01634C8B294                                                                     
[VID]: 0x42572F51D7DFC43008698201B325A4CF                                                                     
[VUK]: 0x763B3E481D317D2D65758B435BBAE027                                                                     
[MKB]: 77                    
[UnitKey]: 1-0x1B1F466724AC224932444A956AE78D2C
[KEYDB_STATUS]: 
[STATUS]: not found
[DiscType]: UHD
------------------------------------
KeyDB entry does not match validated local entry!
Key updated in KeyDB!
KeyDB entry is not found for 5846890EF0240BEBB84DE1620CE8C9D547026FE9
Key updated in KeyDB!
Starting FindVUK validate disc!
It found that my DiscID wasn't present in KeyDB and updated that file. It then tried to start a "Validate" action but hung (bug?), so I killed the application and ran it again, then selected "Validate". Here's what was reported:

Code: Select all

Validating disc...
-----------------------------------------------------------
14:10:32 -  ----------- FindVUK 1.82 ----------- 
-----------------------------------------------------------
 To close FindVUK simply press the ESC key
-----------------------------------------------------------
14:10:32 - MODE: ValidateDisc 
14:10:32 -  DriveLetter  : F 
14:10:32 - SettingsFile: >C:<redacted>\Downloads\KeyDB_Helper_1.0.1.6\FindVUK\config\FindVUK.ini<
14:10:32 - Logfile >C:<redacted>\Downloads\KeyDB_Helper_1.0.1.6\FindVUK\log\2025-12-25_FindVUK.txt< Default Loglevel >2<
14:10:32 - Update enabled - check for update
14:10:32 - Update check failed >#UPD_ERR_READFILE<
14:10:32 - Open Main-KEYDB file: >C:<redacted>\AppData\Roaming\aacs\KEYDB.cfg<
14:10:38 - Open Backup-KEYDB file: >C:<redacted>\Downloads\KeyDB_Helper_1.0.1.6\FindVUK\VUKbackup\KEYDB.cfg<
-------------------------------------------------------------------------------
14:10:38 - Get basic AACS data
-------------------------------------------------------------------------------
14:10:38 - AACS folder on disc is reachable - Validate is possible
14:10:40 - VolumeName         >TRUE_LIES<
14:10:40 - DiscId             >5846890EF0240BEBB84DE1620CE8C9D547026FE9< (2023-12-07)
14:10:40 - DiscType           >UHD<
14:10:40 - MKB Revision       >77<
14:10:40 - Disc-BusEncEnabled >1<
14:10:40 - Drve-BusEncCapable >1<
14:10:40 -  ==> Bus Encryption active!
14:10:40 - UnitKeyCount       >1<
14:10:40 -  >>> UnitKeyENC (1) >33289603BF4CA866907A91AE610DE1B5<
14:10:40 - Data read from KeyDB.cfg:
14:10:40 -  VolumeId: 42572F51D7DFC43008698201B325A4CF
14:10:40 -  MediaKey: 3DDEA57E5D7C6102C1D0F01634C8B294
14:10:40 -  VUK:      763B3E481D317D2D65758B435BBAE027
14:10:40 -  UnitKeys (1):
14:10:40 -  >>> UnitKeyDEC (1) >1B1F466724AC224932444A956AE78D2C<
14:10:40 - UnitKeys recalculated with VUK:
14:10:40 - UnitKeyCount >1<
14:10:40 -  >>> UnitKeyDEC (1) >1B1F466724AC224932444A956AE78D2C<
-------------------------------------------------------------------------------
14:10:40 - BusEncryption enabled => either ReadDataKey or disabling of BusEncryption required
-------------------------------------------------------------------------------
14:10:40 - External tool to disable bus encryption defined >"C:\Program Files (x86)\MakeMKV\makemkvcon64.exe" info dev:$DRIVE$ <
14:10:45 - External tool successfully disabled BusEncryption!
-------------------------------------------------------------------------------
14:10:45 -  --- PART 2 --- VALIDATE VUK/UNITKEYS ---
-------------------------------------------------------------------------------
14:10:46 - Drive is detected as 'REAL BLURAY' drive
14:10:46 - M2TS files found >169<
14:10:46 - Decrypted first unit of file >F:\BDMV\STREAM\00178.m2ts< with UnitKey >1<
14:10:46 - All UnitKeys are VALID! No need to test other files 
-------------------------------------------------------------------------------
14:10:46 - Validation successful! UnitKeys are valid!!
-------------------------------------------------------------------------------
14:10:46 - MediaKey and VolumeID match VUK!
14:10:46 - -------------------------------------------------------
14:10:46 -  MetaTitle   : TRUE LIES - Ultra HDâ„¢
14:10:46 -  VolumeName  : TRUE_LIES
14:10:46 -  DiscID      : 5846890EF0240BEBB84DE1620CE8C9D547026FE9
14:10:46 -  DateDiscID  : 2023-12-07
14:10:46 -  DiscType    : UHD
14:10:46 -  VUK         : 763B3E481D317D2D65758B435BBAE027
14:10:46 -  MEDIAKEY    : 3DDEA57E5D7C6102C1D0F01634C8B294
14:10:46 -  VOLUMEID    : 42572F51D7DFC43008698201B325A4CF
14:10:46 -  >>> UnitKeyDEC (1) >1B1F466724AC224932444A956AE78D2C< (Valid)
14:10:46 -  MKBrev      : 77
14:10:46 -  BusEncrEn   : 1
14:10:46 -  AACS        : 1
14:10:46 -  BD+         : 0
14:10:46 - -------------------------------------------------------
-------------------------------------------------------------------------------
14:10:46 - --- Write entry in main-keydb file ---
-------------------------------------------------------------------------------
14:10:46 - Keys in Keyfile: 175439 keys - KeyFile: C:<redacted>\AppData\Roaming\aacs\KEYDB.cfg
14:10:46 - Disc with ID >5846890EF0240BEBB84DE1620CE8C9D547026FE9< is already in file - need to compare the details
 
14:10:46 - KEYDB: Nearly identical entry already present in keydb-file
14:10:46 -  >> Identical:  TITLE, VUK, MEDIAKEY, VOLUMEID, UNITKEYS, COMMENT - Different:  DATE >> write new entry in keydb-file
 
14:10:48 - Added line with VUK/UnitKeys to file >C:<redacted>\AppData\Roaming\aacs\KEYDB.cfg<
-------------------------------------------------------
14:10:48 - --- Write entry in backup-keydb file ---
-------------------------------------------------------
14:10:48 - KEYDB: file >C:<redacted>\Downloads\KeyDB_Helper_1.0.1.6\FindVUK\VUKbackup\KEYDB.cfg< does not exist ==>> write new entry in keydb-file
 
14:10:48 - Added line with VUK/UnitKeys to file >C:<redacted>\Downloads\KeyDB_Helper_1.0.1.6\FindVUK\VUKbackup\KEYDB.cfg<
 
14:10:48 - -------------------------------------------------------
14:10:48 - --- Upload MetaXML to OnlineDB file ---
14:10:48 - -------------------------------------------------------
14:10:49 - ERROR! Couldn't post the BlurayMetaXML to the OnlineDB! (http://fvonline-db.bplaced.net/fv_upload.php) >ERROR! Received a HTTP Status >503<< (503)
14:10:49 - Successful upload to OnlineDB
14:10:49 - Eject the disc now from drive >F:\<
 
14:10:52 - Successfully ejected the media in drive F!
This action validated that my KeyDB now had my DiscID present. It looks like the process tried to send the change that was performed back to the OnlineDB host to sync the master file, but a HTTP 503 (service unavailable) was reported by that web site.

A final "Disc Info" execution confirmed that everything looked good:

Code: Select all

Getting disc info...
Validation Data: 5F62AAAC93836BBDB5A903B01C097615 [FOUND]
Media Key: 3DDEA57E5D7C6102C1D0F01634C8B294 [VALID]
VUK: 763B3E481D317D2D65758B435BBAE027 [VALID]
Encrypted Unit Key: 33289603BF4CA866907A91AE610DE1B5 [FOUND]
Decrypted Unit Key: 1B1F466724AC224932444A956AE78D2C [FOUND]
Unit Key(s) tested with 3 aligned units : [VALIDATED]
------------------------------------
[(Disc Info)]
[DiscID]: 0x5846890EF0240BEBB84DE1620CE8C9D547026FE9
[Volume]: TRUE_LIES
[Title]: TRUE LIES - Ultra HD™
[Date]: 2024-01-11
[MediaKey]: 0x3DDEA57E5D7C6102C1D0F01634C8B294                                      
[VID]: 0x42572F51D7DFC43008698201B325A4CF                                      
[VUK]: 0x763B3E481D317D2D65758B435BBAE027                                     
[MKB]: 77                    
[UnitKey]: 1-0x1B1F466724AC224932444A956AE78D2C
[KEYDB_STATUS]: (VALIDATED)
[STATUS]: complete
[DiscType]: UHD
------------------------------------
Running MakeMKV against the disc is now working as expected. A big thanks to SamuriHL for this tool!

Only question now is...what's needed to add my update to the master KeyDB file since the automated approach didn't work?

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(Original post)

When attempting to use MakeMKV with the True Lies 4K UHD disc, I receive the dreaded "The volume key is unknown for this disc - video can't be decrypted" message. Reviewing previous posts regarding this message, I downloaded the latest keydb.cfg from http://fvonline-db.bplaced.net/ (LastUpdate: 2025-12-24 20:54:04) and dropped it in my .MakeMKV folder as KEYDB.cfg...but this didn't fix the issue.

Here's what MakeMKV is reporting:

Drive Information
OS device name: \Device\CdRom0
Current profile: BD-ROM
Manufacturer: PIONEER
Product: BD-RW BDR-S12JX
Revision: 1.01
Serial number:
Firmware date: 2020-07-21
Bus encryption flags: 1B
Highest AACS version: 78

LibreDrive Information
Status: Enabled
Drive platform: RS8F01
Firmware name: PIONEER BDR-212T
Firmware type: Original (unpatched)
Firmware version: 1.01/ID72
DVD all regions: Yes
BD raw data read: Yes
BD raw metadata read: Yes
Unrestricted read speed: Yes

Disc Information
Label: TRUE_LIES
Timestamp: 2024-01-10 17:33:57
Protection: AACS2.0/C v77
Data capacity: 93.22 Gb
Disc type: BD-ROM UHD
Number of layers: 3
Bus encryption flags: 80

I sent the AACS dump file (MKB20_v77_TRUE_LIES_CAB1.tgz) to svq@makemkv.com.
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