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Padding out errors with silence
markanini
post Sep 21 2013, 04:57
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I have a few flac files with LOST_SYNC errors. They decode a fraction of a second shorter and can't be fixed by CTDB.
I was thinking if the errors were padded with silence there might be a chance to fix them. Is this possible?

This post has been edited by markanini: Sep 21 2013, 04:58
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greynol
post Sep 21 2013, 06:38
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It's possible to pad the lost data so that all data present and the track decodes to the correct length so that the album can be recognized by the database. I don't know if the database contains enough redundancy to fix the missing data, however.

This post has been edited by greynol: Sep 21 2013, 06:39


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markanini
post Sep 21 2013, 11:31
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QUOTE (greynol @ Sep 21 2013, 07:38) *
It's possible to pad the lost data so that all data present and the track decodes to the correct length so that the album can be recognized by the database. I don't know if the database contains enough redundancy to fix the missing data, however.

Is there a special too for this? Flac.exe and foobar2000 gives me the result I mentioned in OP.
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greynol
post Sep 21 2013, 11:58
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I would use CEP/Audition, myself. Any decent wave editor may work, but one that does a good job visually rendering the waveform will make it easier to spot where the good data ends.

This post has been edited by greynol: Sep 21 2013, 12:01


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fbuser
post Sep 21 2013, 12:35
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I was able to repair such flac files a few times by recoding them to new flac files with the foobar2000 converter. Although the converter was complaining about errors in the source the files, the recoded files could be successfully repaired with CUETools afterwards.
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TomasPin
post Sep 21 2013, 19:42
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QUOTE (greynol @ Sep 21 2013, 07:58) *
I would use CEP/Audition, myself. Any decent wave editor may work, but one that does a good job visually rendering the waveform will make it easier to spot where the good data ends.

+1. I have done this in Audacity a couple of times. Far from the ideal fix, but it does the job.


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markanini
post Sep 22 2013, 06:32
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QUOTE (greynol @ Sep 21 2013, 12:58) *
I would use CEP/Audition, myself. Any decent wave editor may work, but one that does a good job visually rendering the waveform will make it easier to spot where the good data ends.

Ok, I figured as much. Lucky I found Auditotester by VU player that at least gives a time point for the error.
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