[Flac-dev] ERROR: mismatch in decoded data, verify FAILED!

Matt Zimmerman mdz at debian.org
Sun Jun 24 17:10:56 PDT 2001

On Mon, Jun 25, 2001 at 01:54:02AM +0200, kai at adminhell.org wrote:

> On 24-Jun-2001 Matt Zimmerman wrote:
> > Can you try trimming down the WAV file
> > (e.g., with a program like xwave) until you have the smallest chunk which
> > still triggers the failure?
> I tried to clip both ends of the original wav, but the error was only
> reproduceable, when I cut of the end of the wav. When i cut off only one
> second from the start of the soundfile verify did not complain anymore.
> So the "rest" is now about 25 megabytes. 

Interesting.  According to the transcript you sent, the error actually occurred
60% of the way through the file.  Since it doesn't happen when you trim a bit
off the beginning, it sounds like it probably isn't being triggered by a
specific point, but by the accumulated state of the stream (or some other
cumulative effect).

> > If you can make the WAV file (or a portion of it that exhibits the problem)
> > available, that would be a great help.  Note that there should not be any
> > copyright issues associated with sending a small sample of a song.
> I don't have a high bandwith link, so if you mail me an ftp-account/login
> I`ll upload the wav to the place for vivisection purposes ;-)

I don't have anyplace for you to FTP it to at the moment...if you have ssh/scp
available, let me know and I can arrange for a place where you can scp it.  If
you can get it through FLAC successfully (using different options), feel free
to do that to reduce the size of the transfer.

> BTW: flac running on "Linux jukebox 2.4.2 #3 SMP Fri May 25 19:01:56 
>         CEST 2001 i686 unknown"

I've put FLAC to work for the past couple of hours encoding some things at -9,
and haven't hit the problem yet.  Of course, on this machine (PII/350), a
couple of hours is only about 3 tracks at -9.

 - mdz

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