WavPack Hybrid broken on (Arch?) Linux, non lossless and heavily distorted Options

[skamp]

I tried to encode and decode several different WAV files from CD rips with WavPack (version 4.60.1) in hybrid mode, on Arch Linux, on two different machines (Intel Core i7 and Xeon, x86_64). I always got the same result: the files are heavily distorted (groups of samples repeating themselves), and obviously non lossless. See samples.

I ran the following commands:

CODE

wavpack -b400 -c -m hybrid.wav
wvunpack -m hybrid.wv

wvunpack outputs the following:

CODE

WVUNPACK  Hybrid Lossless Audio Decompressor  Linux Version 4.60.1
Copyright (c) 1998 - 2009 Conifer Software.  All Rights Reserved.

original md5:  e180f2ec2c4c65fd214bc6c4f70c7988        
unpacked md5:  2d5edeb0d3d7ba971282428b77fd41c6        
MD5 signatures should match, but do not!

I tried the win32 binary, which worked fine (lossless result). I don't have another Linux distro installed anywhere to see if this problem is distribution-specific. I also tried three different builds (including one built from source by myself), always with the same result.

This post has been edited by skamp: Jul 5 2012, 18:59

[plus]

I can confirm this bug exists on Debian Wheezy amd64, but does NOT exist on Debian Wheezy kfreebsd_amd64.

On the Debian Wheezy amd64 (linux) machine:

CODE

plus@honoka:~$ wavpack -b400 -c -m hybrid.wav

WAVPACK  Hybrid Lossless Audio Compressor  Linux Version 4.60.1
Copyright (c) 1998 - 2009 Conifer Software.  All Rights Reserved.

original md5 signature: e180f2ec2c4c65fd214bc6c4f70c7988
created hybrid.wv (+.wvc) in 0.38 secs (lossless, 41.39%)
plus@honoka:~$ wvunpack -m hybrid.wv

WVUNPACK  Hybrid Lossless Audio Decompressor  Linux Version 4.60.1
Copyright (c) 1998 - 2009 Conifer Software.  All Rights Reserved.

overwrite hybrid.wav (yes/no/all)? yes

original md5:  e180f2ec2c4c65fd214bc6c4f70c7988
unpacked md5:  2d5edeb0d3d7ba971282428b77fd41c6
MD5 signatures should match, but do not!

On the Debian Wheezy kfreebsd_amd64 machine:

CODE

eric@nene:~$ wavpack -b400 -c -m hybrid.wav

WAVPACK  Hybrid Lossless Audio Compressor  GNU/kFreeBSD Version 4.60.1
Copyright (c) 1998 - 2009 Conifer Software.  All Rights Reserved.

original md5 signature: e180f2ec2c4c65fd214bc6c4f70c7988
created hybrid.wv (+.wvc) in 0.47 secs (lossless, 39.23%)
eric@nene:~$ wvunpack -m hybrid.wv

WVUNPACK  Hybrid Lossless Audio Decompressor  GNU/kFreeBSD Version 4.60.1
Copyright (c) 1998 - 2009 Conifer Software.  All Rights Reserved.

overwrite hybrid.wav (yes/no/all)? yes

original md5:  e180f2ec2c4c65fd214bc6c4f70c7988
unpacked md5:  e180f2ec2c4c65fd214bc6c4f70c7988
restored hybrid.wav in 0.35 secs (lossless, 39.23%)

Both computers are running the latest version of wavpack in the Debian repositories.