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Topic: MD5 mismatch, but flac stream is intact? (Read 2989 times) previous topic - next topic
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MD5 mismatch, but flac stream is intact?

Hi.

Usually when a Flac file has been damaged in any way, you'll get a notification upon decoding it and this is the message you'll see in Integrity Verifier:
Failed: Corrupted FLAC stream; MD5 mismatch

However, recently I came across a Flac file that has a MD5 mismatch, but the Flac stream seems to be intact and no error came up upon decoding. Integrity Verifier returned this:
Failed: MD5 mismatch

So I wonder, how could the Flac stream be intact while the file has MD5 mismatch and what could have caused this?

Thanks.

Re: MD5 mismatch, but flac stream is intact?

Reply #2 –
Thanks, Rollin.

Does this confirm that the stream itself is technically undamaged? If not, could anyone explain the nature of the damage and if it can be fixed?

Re: MD5 mismatch, but flac stream is intact?

Reply #3 –
Quote from: recur on
Does this confirm that the stream itself is technically undamaged?
Yes. Stream itself is technically undamaged.
Quote from: recur on
could you explain the nature of the damage and if it can be fixed?
md5 is right md5 computed from data of source wav file. But encoded stream is not bit-berfect copy of source stream due to bug in encoder. This cannot be fixed if you not have original wav.
But if you just don't want to see this error message again, you can reencode this file from flac to flac.

Re: MD5 mismatch, but flac stream is intact?

Reply #4 –
Thanks a lot, Rollin. That covers everything I wanted to know.