Bug 269921

Summary:	Distortions playing mp3 with amarok using the phonon-vlc backend after some time
Product:	[Frameworks and Libraries] phonon-backend-vlc	Reporter:	Michael Seiwert <michael.seiwert>
Component:	general	Assignee:	Harald Sitter <sitter>
Status:	RESOLVED NOT A BUG
Severity:	normal	CC:	bcooksley, cespinal17, fabo, flying.stranger, jb, martin.sandsmark, myriam, valorie.zimmerman
Priority:	NOR
Version:	0.6
Target Milestone:	0.7
Platform:	openSUSE
OS:	Linux
Latest Commit:		Version Fixed In:
Sentry Crash Report:

Description Michael Seiwert 2011-04-02 08:53:45 UTC

Version:           4.5-git (using KDE 4.6.1) 
OS:                Linux

I'm getting distortions playing mp3 files with the phonon-backend (phonon-backend-vlc-0.3.2.0.60.git.1301311994-1.2.i586.rpm). Valori confirmed the distortion while chatting on irc. The distortions are not from the beginning they may appear after some time. 

Reproducible: Always

Comment 1 Michael Seiwert 2011-04-02 09:06:48 UTC

The distortions are reproducible with dragonplayer as well. Gst and Xine engine are working fine with amarok and dragonplayer.

Comment 2 Valorie Zimmerman 2011-04-02 11:22:51 UTC

5:17 into a 45-minute podcast (not downloaded), phonon-vlc stopped playing it in Amarok. There was a brief odd noise, then no sound. Output was mostly:

[0x40a4720] main audio output warning: audio drift is too big (120029), dropping buffer

And occasionally this was there too:

[0x3d31a80] mpgatofixed32 audio filter debug: libmad error: bad main_data_begin pointer
[0x40a4720] main audio output warning: output date isn't PTS date, requesting resampling (451617)

Same podcast played with phonon-gst without a problem.

Comment 3 Harald Sitter 2011-04-02 14:54:10 UTC

What exactly do you mean by distortion?
Also, what version of VLC do you have installed?

Also...
Valorie, that is VLC (or rather libmad) problem you described there.

Comment 4 Michael Seiwert 2011-04-02 17:45:11 UTC

Distortion means that there is some noise added as if the sound was overdriven.(übersteuert in german). 

vlc-noX-1.1.8-1.pm.2.3.i586
libvlc5-1.1.8-1.pm.2.3.i586
vlc-1.1.8-1.pm.2.3.i586
phonon-backend-vlc-0.3.2.0.60.git.1301311994-1.2.i586
vlc-qt-1.1.8-1.pm.2.3.i586
vlc-gnome-1.1.8-1.pm.2.3.i586
libvlccore4-1.1.8-1.pm.2.3.i586

Comment 5 Harald Sitter 2011-04-02 18:54:58 UTC

Hm, ok. Thanks.

We'll better get some debug logs:
http://techbase.kde.org/Development/Tutorials/Debugging/Phonon

Also, please make sure vlc itself does not exhibit this behavior. Should it do, please also use 
export QT_NO_GLIB=1
before fetching log output. This will essentially prevent pulseaudio from being used, mostly eliminating that as source of the problem.

Comment 6 Myriam Schweingruber 2011-04-27 21:34:15 UTC

Reassigning to the new bugzilla product for better bug tracing of the various
backends. Sorry for the noise.

Comment 7 Myriam Schweingruber 2012-02-01 12:55:48 UTC

*** Bug 293028 has been marked as a duplicate of this bug. ***

Comment 8 Myriam Schweingruber 2012-07-30 20:03:50 UTC

Closing for lack of feedback. If you still can reproduce this with version 0.5.0 or the upcoming version 0,6, to be released in a few days, please provide the information requested in comment #5

Comment 9 Soul Kim 2012-10-27 23:40:24 UTC

I have the same bug.
Kubuntu 12.10, phonon-vlc 0.6.0.
Please reopen the bug. I'm ready to provide any needed information to help to fix it.

Comment 10 Myriam Schweingruber 2012-10-31 08:31:29 UTC

(In reply to comment #9)
> I have the same bug.
> Kubuntu 12.10, phonon-vlc 0.6.0.
> Please reopen the bug. I'm ready to provide any needed information to help to fix it.

Reopening based on that comment.

Comment 11 Harald Sitter 2012-11-01 16:41:50 UTC

Information requested in comment #5 still missing.

Comment 12 Myriam Schweingruber 2013-04-13 09:25:43 UTC

Closing for lack of feedback. Please feel free to reopen if this is reproducible with version 0.6.2 or later and you can provide the feedback requested in comment #5