[Bug 861670] [NEW] Audio corruption of m4a files with phonon gstreamer backend

Mark Greenwood fatgerman at googlemail.com
Wed Sep 28 18:32:33 UTC 2011

Public bug reported:

I'm using Amarok to play my music, and very nice it is too  until it encounters some m4a files. I bought these files through iTunes on my Mac, though I'm not sure if that's relevant.
What happens is that initially the files play OK but after about 10 minutes or so the sound becomes distorted (it sounds like a ring modualtor effect). It always happens with this particular album after 2 tracks, no matter where I start. I don't have any other albums in this format to try.
Quitting and restarting Amarok clears the problem for another 2 tracks.
I haven't noticed the same behaviour when playing mp3 files
I switched to phonon-backend-mplayer and two things happened: (1) The sound corruption goes away (2) The sound quality generally improves overall. So I'm happy with mplayer thanks, but I thought I'd log this seeing as I found it. What were you thinking giving us KDE fans a gnome-based audio engine? ;-)

ProblemType: Bug
DistroRelease: Ubuntu 11.04
Package: phonon-backend-gstreamer 4:4.7.0really4.5.0-0ubuntu2.1
ProcVersionSignature: Ubuntu 2.6.38-11.51~ppa1~loms~natty-generic
Uname: Linux 2.6.38-11-generic x86_64
NonfreeKernelModules: nvidia
Architecture: amd64
Date: Wed Sep 28 19:24:06 2011
InstallationMedia: Kubuntu 10.10 "Maverick Meerkat" - Release amd64 (20101007)
 PATH=(custom, user)
SourcePackage: phonon-backend-gstreamer
UpgradeStatus: Upgraded to natty on 2011-08-26 (32 days ago)

** Affects: phonon-backend-gstreamer (Ubuntu)
     Importance: Undecided
         Status: New

** Tags: amd64 apport-bug natty

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  Audio corruption of m4a files with phonon gstreamer backend

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