Automatic SDF/HK downloading is disabled or failed messages

[uhdlover]

This has been raised a few times in the past that makemkv reports:

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Downloading latest HK to C:\Users\steveh/.MakeMKV ...
Automatic HK downloading is disabled or failed.
Saved AACS dump file as C:\Users\<user>/.MakeMKV/<disk specific file>.tgz
The volume key is unknown for this disc - video can't be decrypted

Note: I have downloaded https://www.makemkv.com/svq/sdf.bin into the .MakeMKV directory and restarted to no avail.

I've done some debugging of the request flow and I see makemkv performing 3 requests to hkdata.fairuse.org:443

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GET /b.txt.gz?c=<REDACTED: possible unique disk identifier?> HTTP/1.1 = 200
GET /svq/hkd.dat.gz?c=2-MakeMKV_v1.16.3_win(x64-release) HTTP/1.1 = 200
GET /svq/hkd_00000188.bin.gz HTTP/1.1 = 404

What I believe is happening is that when disk is being decoded by makemkv and the key isn't know it requests an update.
As it knows the keys it already has from _private_data.tar it requests then next file in sequence, which in my case is hkd_00000188.bin.gz which doesn't exist.

It's not clear if this is because

1. It hasn't been created yet - speculative download?
2. It should exist and is really missing - hence the 404?

If 1. is the case is then it might be better to not display the error on 404 for speculative download as to the user this seems to indicate there is a problem with their configuration e.g. firewall preventing download or internet option disabled which is not the case, it's more that the volume key is still unknown as there are no new updates to download.

Hope Mike can confirm either way so others don't get confused by this message.

[Woodstock]

Fixing Volume Key is Unknown

[hernanez]

@uhdlover
If you're disc isn't supported in the current private data tar, MakeMKV will auto attempt to download an updated one if a newer one is available on their servers. From what I can tell, it will not attempt to do it if the key is already available locally, or if there are no new HK updates.
If you're getting that error then it means 1) Your disc isn't supported with local db 2) There is a new HK but MakeMKV is failing to download it for whatever reason.

Did you manage to get it downloaded at the end?

[Trickyd-1]

I was getting the same error earlier but it's fixed now. Thanks Mike.

[uhdlover]

Thanks for the replies I'm aware of the fact that `The volume key is unknown for this disc - video can't be decrypted` happens when the disk isn't known yet.

This was more about the process of downloading the update, which I've not had report an error before. Usually it either doesn't download an update or it succeeds.

I just retried and the download succeeded and the disk key is now known.

Not sure if there was an actually issue that Mike fixed on his end, would be good to know either way

[saturn2888]

I've been seeing this error lately: "Automatic HK downloading is disabled or failed."

After I see it, the drive starts acting sporadically until I pull out the disc. That happened twice until the 3rd run which I've logged below:

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Using LibreDrive mode (v06.3 id=[REDACTED])
Using direct disc access mode
Loaded content hash table, will verify integrity of M2TS files.
Downloading latest HK to C:/Users/[REDACTED]/.MakeMKV ...
Automatic HK downloading is disabled or failed.
Saved AACS dump file as C:/Users/[REDACTED]/.MakeMKV/[REDACTED].tgz
The volume key is unknown for this disc - video can't be decrypted
Failed to open disc