thr3ads.net - Flac - [Flac] Fixing corrupt flac files [Jan 2013]

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Knut Krause

2013-Jan-10 19:50 UTC

[Flac] Fixing corrupt flac files

So, let's provide some information then :-)

----------------------------------------------------------------------------------------------

soa2ii at thor /mnt/files/music/Slime/Alle gegen Alle $ flac -aF 02\ 
St?rtebecker.flac 

flac 1.2.1, Copyright (C) 2000,2001,2002,2003,2004,2005,2006,2007  Josh Coalson
flac comes with ABSOLUTELY NO WARRANTY.  This is free software, and you are
welcome to redistribute it under certain conditions.  Type `flac' for
details.

02 St?rtebecker.flac: analyzing, 96% complete

02 St?rtebecker.flac: ERROR while decoding data
                       state = FLAC__STREAM_DECODER_END_OF_STREAM
02 St?rtebecker.flac: ERROR, MD5 signature mismatch

----------------------------------------------------------------------------------------------

The *.ana: http://bpaste.net/show/69346/

----------------------------------------------------------------------------------------------

The size in bytes:
soa2ii at thor /mnt/files/music/Slime/Alle gegen Alle $ du 02\ St?rtebecker.flac
16680   02 St?rtebecker.flac

----------------------------------------------------------------------------------------------

The size of the wav file
soa2ii at thor /mnt/files/music/Slime/Alle gegen Alle $ flac -dF 02\ 
St?rtebecker.flac 

flac 1.2.1, Copyright (C) 2000,2001,2002,2003,2004,2005,2006,2007  Josh Coalson
flac comes with ABSOLUTELY NO WARRANTY.  This is free software, and you are
welcome to redistribute it under certain conditions.  Type `flac' for
details.

02 St?rtebecker.flac: 96% complete

02 St?rtebecker.flac: ERROR while decoding data
                       state = FLAC__STREAM_DECODER_END_OF_STREAM
02 St?rtebecker.flac: ERROR, MD5 signature mismatch
soa2ii at thor /mnt/files/music/Slime/Alle gegen Alle $ du 02\ St?rtebecker.wav 
22468   02 St?rtebecker.wav

------------------------------------------------------------------------------------------------

The tail of the corrupted file: http://lagom.de/tmp/tail.flac

I hope this is all information needed :-)

regards


Knut


Am Donnerstag, 10. Januar 2013, 19:36:34 schrieb Martijn van
Beurden:> On 10-01-13 19:15, Knut Krause wrote:
> > I think it's not possible to share those files without getting in
legal
> > trouble here or is it possible somehow to extract some information so
it
> > won't be an issue?
> 
> It could have been you had a file with the problem which is released
> under a Creative Commons licence, but that's not very common. Just
asking.
> 
> You can do a few things. Reading your previous post, it seems you now
> how to work with a command line, so could you post the output of the
> following two commands:
> 
> flac -a -F some_corrupt_file.flac (see the .ana file which is generated)
> metaflac --list some_corrupt_file.flac (just the console output)
> 
> Plus the exact size (in bytes) of the FLAC-file and the WAV-file that
> you retrieve using flac -d -F some_corrupt_file.flac
> 
> You can also try to cut off the last 500kb of the FLAC-file if you are
> using Linux (or other UNIX-like probably, I have no idea how to do this
> in Windows or Mac)
> tail -c 500000 some_corrupt_file.flac > tail_cut_off.flac
> That's a sample of at most 10 seconds and won't get you into
trouble.
> 
> 
> 
> _______________________________________________
> Flac mailing list
> Flac at xiph.org
> http://lists.xiph.org/mailman/listinfo/flac

Martijn van Beurden

2013-Jan-10 21:44 UTC

head link

[Flac] Fixing corrupt flac files

On 10-01-13 20:50, Knut Krause wrote:> 02 St?rtebecker.flac: ERROR while decoding data
>                         state = FLAC__STREAM_DECODER_END_OF_STREAM
> 02 St?rtebecker.flac: ERROR, MD5 signature mismatch
Ah, you didn't mention that last one, MD5 mismatch, in your first mail.
> The tail of the corrupted file: http://lagom.de/tmp/tail.flac
I haven't been able to pinpoint the cause of this error, (I'm able to 
reproduce it) but it certainly is no tagging issue, which I thought at 
first, so a corruption seems the cause.  However, corruption happening 
with a lot of files, all in the last few percent, that cannot be 
coincidence. I'm definitely going to look into this, probably tomorrow 
or somewhere this weekend, as trying to decode the file "by hand" to 
find the error takes a lot of time.

Could you please send me the output of metaflac --list as well, in 
particular the vendor string from the VORBIS_COMMENT block, I'm curious 
which encoder produced this.

Knut Krause

2013-Jan-10 22:01 UTC

head link

[Flac] Fixing corrupt flac files

Here you are:

soa2ii at thor /mnt/files/music/Slime/Alle gegen Alle $ metaflac --list 02\ 
St?rtebecker.flac 
METADATA block #0
  type: 0 (STREAMINFO)
  is last: false
  length: 34
  minimum blocksize: 4608 samples
  maximum blocksize: 4608 samples
  minimum framesize: 14 bytes
  maximum framesize: 15637 bytes
  sample_rate: 44100 Hz
  channels: 2
  bits-per-sample: 16
  total samples: 5857656
  MD5 signature: eed0112053a62bbe0734502ef9a4b0b0
METADATA block #1
  type: 3 (SEEKTABLE)
  is last: false
  length: 234
  seek points: 13
    point 0: sample_number=0, stream_offset=0, frame_samples=4608
    point 1: sample_number=446976, stream_offset=1314129, frame_samples=4608
    point 2: sample_number=898560, stream_offset=2663921, frame_samples=4608
    point 3: sample_number=1350144, stream_offset=4059085, frame_samples=4608
    point 4: sample_number=1801728, stream_offset=5431315, frame_samples=4608
    point 5: sample_number=2248704, stream_offset=6720588, frame_samples=4608
    point 6: sample_number=2700288, stream_offset=8088365, frame_samples=4608
    point 7: sample_number=3151872, stream_offset=9456245, frame_samples=4608
    point 8: sample_number=3603456, stream_offset=10823115, frame_samples=4608
    point 9: sample_number=4055040, stream_offset=12179598, frame_samples=4608
    point 10: sample_number=4502016, stream_offset=13497513, frame_samples=4608
    point 11: sample_number=4953600, stream_offset=14827454, frame_samples=4608
    point 12: sample_number=5405184, stream_offset=16137500, frame_samples=4608
METADATA block #2
  type: 4 (VORBIS_COMMENT)
  is last: false
  length: 701
  vendor string: reference libFLAC 1.1.2 20050205
  comments: 25
    comment[0]: title=St?rtebecker
    comment[1]: releasecountry=DE
    comment[2]: totaldiscs=1
    comment[3]: label=Aggressive Rockproduktionen
    comment[4]: totaltracks=15
    comment[5]: musicbrainz_albumartistid=a0fe06e3-deb7-4ea2-a7de-cc93740fd163
    comment[6]: date=1983
    comment[7]: discnumber=1
    comment[8]: tracktotal=15
    comment[9]: asin=B00000AQ1Q
    comment[10]: albumartistsort=Slime
    comment[11]: originaldate=1983
    comment[12]: artist=Slime
    comment[13]: musicbrainz_albumid=66babc5d-cd05-41ec-b96f-9f48ce56a81f
    comment[14]: releasestatus=official
    comment[15]: albumartist=Slime
    comment[16]: album=Alle gegen Alle
    comment[17]: musicbrainz_artistid=a0fe06e3-deb7-4ea2-a7de-cc93740fd163
    comment[18]: media=CD
    comment[19]: releasetype=album
    comment[20]: disctotal=1
    comment[21]: script=Latn
    comment[22]: musicbrainz_trackid=123617d2-5c5f-4926-91ba-59b9ebcc90fe
    comment[23]: artistsort=Slime
    comment[24]: tracknumber=2
METADATA block #3
  type: 1 (PADDING)
  is last: true
  length: 3559


I'll provide flac -t of the whole album. It looks to me as if there are a
lot
of error types present ;-)

soa2ii at thor /mnt/files/music/Slime/Alle gegen Alle $ flac -t *.flac

flac 1.2.1, Copyright (C) 2000,2001,2002,2003,2004,2005,2006,2007  Josh Coalson
flac comes with ABSOLUTELY NO WARRANTY.  This is free software, and you are
welcome to redistribute it under certain conditions.  Type `flac' for
details.

01 Linke Spie?er.flac: testing, 94% complete

01 Linke Spie?er.flac: ERROR while decoding data
                        state = FLAC__STREAM_DECODER_END_OF_STREAM
02 St?rtebecker.flac: testing, 96% complete

02 St?rtebecker.flac: ERROR while decoding data
                       state = FLAC__STREAM_DECODER_END_OF_STREAM
03 Untergang.flac: testing, 97% complete

03 Untergang.flac: ERROR while decoding data
                   state = FLAC__STREAM_DECODER_END_OF_STREAM
04 Zu kalt.flac: testing, 98% complete

04 Zu kalt.flac: ERROR while decoding data
                 state = FLAC__STREAM_DECODER_END_OF_STREAM
05 Ihr seid sch?n.flac: ERROR, MD5 signature mismatch
06 Religion.flac: testing, 99% complete

06 Religion.flac: ERROR while decoding data
                  state = FLAC__STREAM_DECODER_END_OF_STREAM
07 Nazis raus.flac: testing, 96% complete07 Nazis raus.flac: *** Got error code 
1:FLAC__STREAM_DECODER_ERROR_STATUS_BAD_HEADER
07 Nazis raus.flac: *** Got error code 
0:FLAC__STREAM_DECODER_ERROR_STATUS_LOST_SYNC


07 Nazis raus.flac: ERROR while decoding data
                    state = FLAC__STREAM_DECODER_READ_FRAME
08 Sand im Getriebe.flac: testing, 98% complete

08 Sand im Getriebe.flac: ERROR while decoding data
                          state = FLAC__STREAM_DECODER_END_OF_STREAM
09 Alle gegen Alle.flac: testing, 96% complete09 Alle gegen Alle.flac: *** Got 
error code 0:FLAC__STREAM_DECODER_ERROR_STATUS_LOST_SYNC
09 Alle gegen Alle.flac: *** Got error code 
0:FLAC__STREAM_DECODER_ERROR_STATUS_LOST_SYNC


09 Alle gegen Alle.flac: ERROR while decoding data
                         state = FLAC__STREAM_DECODER_READ_FRAME
10 Die Letzten.flac: testing, 98% complete10 Die Letzten.flac: *** Got error 
code 2:FLAC__STREAM_DECODER_ERROR_STATUS_FRAME_CRC_MISMATCH


10 Die Letzten.flac: ERROR while decoding data
                     state = FLAC__STREAM_DECODER_READ_FRAME
11 Etikette t?tet.flac: testing, 97% complete11 Etikette t?tet.flac: *** Got 
error code 0:FLAC__STREAM_DECODER_ERROR_STATUS_LOST_SYNC
11 Etikette t?tet.flac: *** Got error code 
0:FLAC__STREAM_DECODER_ERROR_STATUS_LOST_SYNC


11 Etikette t?tet.flac: ERROR while decoding data
                         state = FLAC__STREAM_DECODER_READ_FRAME
12 Ich will nicht werden.flac: testing, 99% complete

12 Ich will nicht werden.flac: ERROR while decoding data
                               state = FLAC__STREAM_DECODER_END_OF_STREAM
13 Tod.flac: testing, 96% complete

13 Tod.flac: ERROR while decoding data
             state = FLAC__STREAM_DECODER_END_OF_STREAM
14 Junge Junge.flac: testing, 92% complete

14 Junge Junge.flac: ERROR while decoding data
                     state = FLAC__STREAM_DECODER_END_OF_STREAM
15 Guter Rat ist teuer.flac: testing, 97% complete

15 Guter Rat ist teuer.flac: ERROR while decoding data
                             state = FLAC__STREAM_DECODER_END_OF_STREAM


I wrote a little script checking my whole collection for corrupt files using 

flac -wst "$1" 2>/dev/null || printf '%3d %s\n'
"$?" "$1"

in a little find/bash script. I can run batch checks and provide output as 
needed :-)

regards


Knut


Am Donnerstag, 10. Januar 2013, 22:44:14 schrieb Martijn van
Beurden:> On 10-01-13 20:50, Knut Krause wrote:
> > 02 St?rtebecker.flac: ERROR while decoding data
> > 
> >                         state = FLAC__STREAM_DECODER_END_OF_STREAM
> > 
> > 02 St?rtebecker.flac: ERROR, MD5 signature mismatch
> 
> Ah, you didn't mention that last one, MD5 mismatch, in your first mail.
> 
> > The tail of the corrupted file: http://lagom.de/tmp/tail.flac
> 
> I haven't been able to pinpoint the cause of this error, (I'm able
to
> reproduce it) but it certainly is no tagging issue, which I thought at
> first, so a corruption seems the cause.  However, corruption happening
> with a lot of files, all in the last few percent, that cannot be
> coincidence. I'm definitely going to look into this, probably tomorrow
> or somewhere this weekend, as trying to decode the file "by hand"
to
> find the error takes a lot of time.
> 
> Could you please send me the output of metaflac --list as well, in
> particular the vendor string from the VORBIS_COMMENT block, I'm curious
> which encoder produced this.
> _______________________________________________
> Flac mailing list
> Flac at xiph.org
> http://lists.xiph.org/mailman/listinfo/flac

Linda Walsh

2013-Jan-11 02:37 UTC

head link

[Flac] Fixing corrupt flac files

Knut Krause wrote:> So, let's provide some information then :-)
>
>
----------------------------------------------------------------------------------------------
>
> soa2ii at thor /mnt/files/music/Slime/Alle gegen Alle $ flac -aF 02\ 
> St?rtebecker.flac 
>   
Could this have something to do with you encoding the song titles
in ISO-8859-1 and flac-meta information is in UTF-8?

Knut Krause

2013-Jan-13 14:31 UTC

head link

[Flac] Fixing corrupt flac files

Here everything looks fine. Could it be a local encoding problem on your side?

Am Donnerstag, 10. Januar 2013, 18:37:13 schrieb Linda
Walsh:> Knut Krause wrote:
> > So, let's provide some information then :-)
> > 
> >
--------------------------------------------------------------------------
> > --------------------
> > 
> > soa2ii at thor /mnt/files/music/Slime/Alle gegen Alle $ flac -aF 02\
> > St?rtebecker.flac
> 
> Could this have something to do with you encoding the song titles
> in ISO-8859-1 and flac-meta information is in UTF-8?

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