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List:       sox-devel
Subject:    [SoX-devel] [ sox-Bugs-3539474 ] WAV --ignore-length reads past end of WAVE chunk
From:       SourceForge.net <noreply () sourceforge ! net>
Date:       2012-07-02 15:05:45
Message-ID: E1SliCB-00042Y-08 () sfs-ml-1 ! v29 ! ch3 ! sourceforge ! com
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Bugs item #3539474, was opened at 2012-07-02 08:05
Message generated for change (Tracker Item Submitted) made by ccaz
You can respond by visiting: 
https://sourceforge.net/tracker/?func=detail&atid=110706&aid=3539474&group_id=10706

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Category: None
Group: None
Status: Open
Resolution: None
Priority: 5
Private: No
Submitted By: Charles (ccaz)
Assigned to: Nobody/Anonymous (nobody)
Summary: WAV --ignore-length reads past end of WAVE chunk

Initial Comment:
Some WAV files contain extra RIFF chunks with metadata or other data in them (iXML is \
an example: http://www.gallery.co.uk/ixml/ ; for a list of software generating this \
chunk, see http://www.gallery.co.uk/ixml/compatible.html).  Extra trailing RIFF \
chunks interact badly with the --ignore-length sox parameter, because sox reads past \
the end of the WAVE chunk containing the audio data and interprets the contents of \
the extra chunk(s) as audio data.

So I can't use --ignore-length to fix WAVE files which contain bogus lengths (or 0 \
lengths) in the WAVE header if these files also contain extra chunks, as that results \
in random glitches on the end of the audio.

Ideally --ignore-length would indeed ignore the length specifiec in the WAVE header, \
but would only read to the end of the WAVE audio chunk in the file.


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