Error checker for FLAC library?

[davide256]

Just had an issue where my backup library had some corrupted FLAC files, now  I want to check all just to make sure no more are lurking in source or backup directory. Any good programs out there that do this?  Also wondering the same now about DSD files...

[katools]

Windows, OSX or Linux for the FLAC checking?

 

Re DSD and others I can't help as they have no in-built error checking I'm aware of.

 

Regarding detecting future bit rot in general:

 

https://www.snapraid.it/

[robi20064]

This is rather simplistic and a bit outdated, but good enough to verify FLAC integrity. 

 

http://flacfrontend.sourceforge.net/

 

[CatManDo]

Maybe not suitable for checking an entire collection, but I use the Dynamic Range Meter plugin in foobar2000 for every new album ripped or downloaded.

 

It scans all the files of an album in about 10 seconds and stops in case of a file playback error. This made it possible for me to detect faulty files without having to listen to them.

 

https://audio-file.org/2020/06/03/foo_dynamic_range-foobar-dynamic-range/

[yamamoto2002]

PlayPcmWin installer package includes FlacIntegrityChecker program.

It is installed on C:\Program Files\yamamoto2002\PlayPcmWin64\FlacIntegrityChecker

 

 

 

[davide256]

35 minutes ago, yamamoto2002 said:

PlayPcmWin installer package includes FlacIntegrityChecker program.

It is installed on C:\Program Files\yamamoto2002\PlayPcmWin64\FlacIntegrityChecker

 

 

 

Thanks, will give this a try. Trying to prep now for a NAS HD size upgrade and want to be sure that I catch any bad data.

 

Roon checks tags when you add to your library, was able to find that something happened to albums starting with "E" in the backup. But

that check wont help if corruption was outside the tag...

[davide256]

Running now, will see how long 7300 files takes 😁

[botrytis]

I would hate to see how long 90K FLAC files would take :D

[yamamoto2002]

Program outputs elapsed time when FLAC integrity check is finished 😁

[davide256]

========================================

WWFlacIntegrityCheck version 1.0.13.6
Counting files in "D:\Music\FLAC"...Found 7377 files.
Integrity Checking...
FLAC Metadata total_samples field is Unknown : D:\Music\FLAC\Various Artists\Crazy For You [Original Broadway Cast Recording]\23 Company, The - Finale.flac
(5546/7377) Error: FLAC lost sync error. Or this is not FLAC file. : D:\Music\FLAC\Emerson String Quartet\Shostakovich; String Quartet No. 8 in C minor\01 Emerson String Quartet - String Quartet No. 8 in C minor, Op. 110- Largo.flac

(5864/7377) Error: FLAC decoder process failed : D:\Music\FLAC\Dixie Chicks\Taking the Long Way\08 Dixie Chicks - Silent House.flac

Finished. Corrupted FLAC files = 2, Elapsed time = 00:48:11.9801910

========================================

Not bad for time and I have a few to fix  👍

 

Need to do this next against the NAS, suspect thats going to take far longer. Having something like this to run regularly for the NAS

seems like a good idea

 

[yamamoto2002]

35 minutes ago, davide256 said:

FLAC Metadata total_samples field is Unknown : D:\Music\FLAC\Various Artists\Crazy For You [Original Broadway Cast Recording]\23 Company, The - Finale.flac

This file is OK and it is not error. Sorry for the confusing message...

Other two files are corrupted.

[davide256]

=================================

Counting files in "\\Diskstation\music\FLAC"...Found 7508 files.
Integrity Checking...
FLAC Metadata total_samples field is Unknown : \\Diskstation\music\FLAC\Various Artists\Crazy For You [Original Broadway Cast Recording]\23 Company, The - Finale.flac
Finished. Corrupted FLAC files = 0, Elapsed time = 00:46:20.0460571

====================================

 

So this was across Etherregen switch, gige connections, completed slightly faster than like local HD scan. This will work.

[davide256]

Had something weird happen. Roon identified 3 files as bad last nite, I overwrote them with files from the NAS that were verified good on NAS today, bad on HD

would swear they played after overwrite last nite but today they were bad again. Manually deleted, purged recycle bin and recopied, they play now.

Will check again in 24 hours.

[yamamoto2002]

It seems Microsoft Windows 10 File Explorer's FLAC metadata edit function corrupts FLAC files when certain conditions are met (On exotic structured FLAC file its ID3 metadata field of the FLAC file is placed before the fLaC FourCC, its metadata is edited by Windows 10 File Explorer). There is a Powershell script to fix unplayable FLAC file created by this metadata editor bug:

https://support.microsoft.com/en-us/topic/kb5003430-flac-encoded-music-file-is-corrupted-when-metadata-is-edited-in-windows-explorer-38619369-0787-44a8-950f-b408114ae856