Bug 339097

Summary:	phonon-backend-gstreamer-4.8.0 causes amarok to hang
Product:	[Frameworks and Libraries] phonon-backend-gstreamer	Reporter:	Till Schäfer <till2.schaefer>
Component:	general	Assignee:	Daniel Vrátil <dvratil>
Status:	RESOLVED NOT A BUG
Severity:	normal	CC:	johu, myriam, romain.perier, sitter, tdfischer, uwelk
Priority:	NOR
Version:	4.7-git
Target Milestone:	4.8
Platform:	Gentoo Packages
OS:	Linux
URL:	https://bugs.gentoo.org/show_bug.cgi?id=522880
Latest Commit:		Version Fixed In:

Description Till Schäfer 2014-09-15 15:24:58 UTC

after upgrading to media-libs/phonon-gstreamer-4.8.0 (a requirement of kde 4.14 in gentoo) Amarok stops working, when using the gstreamer backend. The application freezes directly after initialization observable by graphical artifacts. 

this bug is reproducible on two computers, running amarok 2.8.0-r3 and amarok git (build 04.09.2014 13:00 UTC)

i have linked the gentoo bug

Reproducible: Always

Steps to Reproduce:
1. install media-libs/phonon-gstreamer-4.8.0 (this is gentoo)
2. set gstreamer backend for phonon in systemsettings
3. start amarok

Reproducible: Always

Comment 1 Daniel Vrátil 2014-09-15 22:09:36 UTC

Did you recompile your QtWebkit against GStreamer-1.0? phonon-gstreamer 4.8 uses GStreamer-1.0, so if you start Amarok with phonon-gst 4.8, but QtWebkit linked against GStreamer- 0.10, the application will try to load both sets of plugins (for both 0.10 and 1.0) and it deadlocks (well, GStreamer deadlocks).

Comment 2 Till Schäfer 2014-09-16 09:12:43 UTC

No, this seems to be indeed the case. 

However, this is a problem, since qt-4.8.x webkit does not support gstreamer-1.x afaik. (Gentoo devs seem to consider packaging qtwebkit seperatily in the future -> see downstream bug report)

Comment 3 Till Schäfer 2015-02-22 15:39:00 UTC

forgot to change status

Comment 4 Daniel Vrátil 2015-04-06 22:46:41 UTC

Marking as invalid, since this is not a phonon bug.

For the record, there are patches lying around the interwebs to make Qt 4 WebKit build with gstreamer-1.0, they are used by most distributions that decided to dump gst0.10 for good (like Fedora)

Comment 5 Till Schäfer 2015-04-06 22:55:58 UTC

can you please give a link to that patch?

Comment 6 Daniel Vrátil 2015-04-06 23:18:34 UTC

This is the one we have in Fedora (it's originally from openSUSE packages, but I don't know where their distgit is :-) )

 http://pkgs.fedoraproject.org/cgit/qtwebkit.git/commit/?id=4564ccf943eb2dea00631397e2e4d8fdca3c9b7a

Comment 7 Till Schäfer 2015-04-07 09:20:19 UTC

thx