[ogg-dev] Fixing ogg vorbis corruption caused by bad metadata

Conrad Parker conrad at metadecks.org
Tue Jun 30 08:05:29 PDT 2009

2009/6/30 Adam Rosi-Kessel <adam at rosi-kessel.org>:
> Monty Montgomery wrote, on 6/25/2009 2:16 PM:
>>> Is there any way to understand exactly how it is invalid? I can replicate
>>> this corruption simply by adding large album art to any ogg file with the
>>> latest release of MediaMonkey.
>> The second page is corrupt.  The basic structure looks correct, first
>> guess would be bad checksum.  I'll look more closely in just a bit.
>> This might explain why some players might accept it--- if they're
>> ignoring checksumming and error detection.
> I've noticed that I may have different varieties of corruption. For
> example, this file doesn't have the oversized embedded album art:
> http://adam.rosi-kessel.org/bugs/liboggz/484/other_corruption.ogg
> Yet also won't play or process properly with oggz or hogg tools. Any
> ideas whether this is the same or different root cause? (In all of these
> cases, I'm reasonably certain that disk corruption is not an issue).

that one is entirely missing the comments data, and the second page is
incorrectly marked as continued. Not sure that helps with
understanding the problem, but I can confirm that it's broken in a
different way :-)


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