[Flac-dev] problem with file.wav > 700MB

[Josh Coalson]

yes, the 'pad' chunk is what tripped up flac.  I know that I need
to add support to skip other chunks, but it's been lower on my
list, and nobody else has submitted a patch.

right now I'm only doing optimization work.  after that I will
probably get to this and a couple other flac requests.

Josh

--- Jan Suhr <jan.suhr at usa.net> wrote:
> On Mittwoch 09 Mai 2001 02:53, you wrote:
> > > > first I should say that it MIGHT not be because the file is
> > > > large. the wave reader in flac is pretty rudimentary and if
> there
> > > > is any sub chunk between the wave header and data sub chunk
> flac
> > > > will give you that error.  could you inspect the wav file to
> see
> > > > if that's the case?
> > >
> > > Sorry, I dont know how to do this. Is it easy to explain me, a
> > > user?
> >
> > are you using windows or unix?  on unix you can do something like:
> >
> > 	od -c file.wav | head -20
> >
> > which will show you the first 100 or so characters.  any non
> > printable ones will be in octal (like \003 for ctrl-c).  compare
> the
> > subchunks you find against the wav format:
> >
> > 	http://www.borg.com/~jglatt/tech/wave.htm
> >
> > if it has a 'list' 'plst' 'cue ' 'labl' 'note' or any subchunk that
> > is not 'data' then flac will not parse it.
> 
> ok, I found a "pad" subchunk. Is this the reason for flac to disagree
> 
> with this file? If so, why flac doesnt ignore this subchunk? 
> At http://www.borg.com/~jglatt/tech/wave.htm I read:
> 
> All applications that use WAVE must be able to read the 2 required 
> chunks and can choose to selectively ignore the optional chunks. A 
> program that copies a WAVE should copy all of the chunks in the WAVE,
> 
> even those it chooses not to interpret.
> 
> Bye, Jan> 0000000   R   I   F   F   l 034   Ð   @   W   A   V   E   f
  m   t  
>  
> 0000020 020  \0  \0  \0 001  \0 002  \0 200   »  \0  \0  \0   î 002 
> \0
> 0000040 004  \0 020  \0   P   A   D       Ì 017  \0  \0  \0  \0  \0 
> \0
> 0000060  \0  \0  \0  \0  \0  \0  \0  \0  \0  \0  \0  \0  \0  \0  \0 
> \0
> *
> 0007760  \0  \0  \0  \0  \0  \0  \0  \0   d   a   t   a   t  \f   Ð  
> @
> 0010000   J  \0   J  \0   S  \0   G  \0   T  \0   I  \0   N  \0   K 
> \0
> 0010020   U  \0   =  \0   S  \0   C  \0   _  \0   <  \0   [  \0   D 
> \0
> 0010040   S  \0   L  \0   \  \0   G  \0   W  \0   I  \0   S  \0   K 
> \0
> 0010060   R  \0   L  \0   Q  \0   =  \0   T  \0   @  \0   X  \0   M 
> \0
> 0010100   Y  \0   C  \0   Y  \0   ;  \0   U  \0   D  \0   R  \0   D 
> \0
> 0010120   R  \0   I  \0   M  \0   A  \0   P  \0   @  \0   W  \0   H 
> \0
> 0010140   M  \0   B  \0   S  \0   C  \0   V  \0   E  \0   U  \0   H 
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> 0010160   P  \0   B  \0   Q  \0   @  \0   S  \0   :  \0   S  \0   A 
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> \0
> 0010220   V  \0   @  \0   Q  \0   C  \0   W  \0   @  \0   Q  \0   A 
> \0
> 0010240   N  \0   E  \0   P  \0   C  \0   P  \0   E  \0   V  \0   O 
> \0
> 0010260   R  \0   H  \0   V  \0   F  \0   R  \0   F  \0   \  \0   D 
> \0
> 0010300   Q  \0   C  \0   U  \0   G  \0   U  \0   K  \0   L  \0   F 
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> \0
> 


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