[vorbis] Corrupt Files

Daniel Schregenberger npfdd at gmx.ch
Sun Oct 20 15:26:01 PDT 2002


 ('binary' encoding is not supported, stored as-is)
Hello,

I recently noticed that some of my vorbis-files are corrupt, and I'm sure they
weren't before. I have no idea how this could happen.
Now my question is: is this vorbis' fault or is it more likely that my (still
present) Windows-Installation destroyed the data? (Or even worse: my harddisk's
corrupt) The files are on a FAT32-Partition, created with Vorbis-1.0-final
under linux.
The other question is: is there a way/tool to restore the data?

Here's what ogginfo gives me (for 2 of the corrupt files; one of them is very
small (108K); if you want me to I can post it/mail it):
Processing file "/oggs/Wendy - Mrs. Landers.ogg"...

Warning: Hole in data found at approximate offset 4500 bytes. Corrupted ogg.
Error: No ogg data found in file "/oggs/Wendy - Mrs. Landers.ogg".
Input probably not ogg.

<p><p>Processing file "/oggs/U2 - The Best Of 1980-1990/U2 & B.B. King - When Love
Comes To Town.ogg"...

New logical stream (#1, serial: 42384014): type vorbis
Vorbis headers parsed for stream 1, information follows...
Version: 0
Vendor: Xiph.Org libVorbis I 20020717 (1.0)
Channels: 2
Rate: 44100

Nominal bitrate: 192,003000 kb/s
Upper bitrate not set
Lower bitrate not set
User comments section follows...
        title=When Love Comes To Town
        artist=U2 & B.B. King
        album=The Best Of 1980-1990
        date=1998
        tracknumber=12/14
        genre=Rock
Warning: Hole in data found at approximate offset 5238000 bytes. Corrupted ogg.
Warning: Invalid header page, no packet found
Warning: Invalid header page in stream 2, contains multiple packets
Warning: illegally placed page(s) for logical stream 2
This indicates a corrupt ogg file.
Warning: sequence number gap in stream 2. Got page 637 when expecting page 0.
Indicates missing data.
Warning: EOS not set on stream 1
Vorbis stream 1:
        Total data length: 5225279 bytes
        Playback length: 4m:06s
        Average bitrate: 169,536086 kbps
Warning: EOS not set on stream 2

-- Daniel

<p>Never hit a man with glasses.  Hit him with a baseball bat.
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