[Bug 36725] can't play .flac files with Thythmbox in Ubuntu Dapper

[Guillaume Le Bars]

Public bug reported:
https://launchpad.net/malone/bugs/36725

Affects: rhythmbox (Ubuntu)
       Severity: Normal
       Priority: (none set)
         Status: Unconfirmed

Description:
I installed Rhythmbox along side with gstreamer0.10 and with all the
necessary libs (good, bad, ugly and else...) I added gstreamer0.8-flac,
libgstreamer-plugins0.8-0, libgstreamer0.8-0. Each time I play a .flac
song rhythmbox skips to the next "playable" one and usually starts
playing the first .mp3 or .wav file available. I have searched several
forums without success. I only found #29959 bug which looks like mine
but concerns .mp3 files.

I think the problem comes from gstreamer0.10: if I do:
gst-launch-0.10 gnomevfssrc location=/media/hdc6/gui/Playlist/Musiques/Stranglers.flac ! alsasink
I get: 
Setting pipeline to PAUSED ...
Pipeline is PREROLLING ...
ERROR: from element /pipeline0/alsasink0: No standard error message for domain gst-stream-error-quark and code 11.
Additional debug info:
gstbaseaudiosink.c(427): gst_base_audio_sink_preroll (): /pipeline0/alsasink0:
sink not negotiated.
ERROR: pipeline doesn't want to preroll.
Setting pipeline to NULL ...
FREEING pipeline ...

I run gdb rhythmbox
It gave:
(gdb) run
Starting program: /usr/bin/rhythmbox
(no debugging symbols found)
(no debugging symbols found)
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---Type <return> to continue, or q <return> to quit---
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[Thread debugging using libthread_db enabled]
[New Thread -1226557760 (LWP 7506)]
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
---Type <return> to continue, or q <return> to quit---
(no debugging symbols found)
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---Type <return> to continue, or q <return> to quit---
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---Type <return> to continue, or q <return> to quit---
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---Type <return> to continue, or q <return> to quit---
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---Type <return> to continue, or q <return> to quit---
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---Type <return> to continue, or q <return> to quit---
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---Type <return> to continue, or q <return> to quit---
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[New Thread -1236653136 (LWP 7527)]
[New Thread -1245045840 (LWP 7528)]
(no debugging symbols found)
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[New Thread -1245606992 (LWP 7529)]
[Thread -1245606992 (LWP 7529) exited]
[New Thread -1245606992 (LWP 7530)]

(rhythmbox:7506): Rhythmbox-WARNING **: Unable to start mDNS browsing
[Thread -1245606992 (LWP 7530) exited]
[New Thread -1253999696 (LWP 7532)]
[Thread -1253999696 (LWP 7532) exited]
(no debugging symbols found)
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[New Thread -1253999696 (LWP 7533)]
[Thread -1253999696 (LWP 7533) exited]
[New Thread -1253999696 (LWP 7538)]
[New Thread -1245606992 (LWP 7539)]
[New Thread -1263666256 (LWP 7540)]
[New Thread -1272058960 (LWP 7541)]
[Thread -1263666256 (LWP 7540) exited]
[Thread -1272058960 (LWP 7541) exited]
[Thread -1245606992 (LWP 7539) exited]
(no debugging symbols found)
[New Thread -1263666256 (LWP 7542)]
[New Thread -1272058960 (LWP 7543)]
[New Thread -1245606992 (LWP 7544)]
[Thread -1245606992 (LWP 7544) exited]
[Thread -1263666256 (LWP 7542) exited]
[Thread -1272058960 (LWP 7543) exited]
[New Thread -1272058960 (LWP 7549)]
[Thread -1272058960 (LWP 7549) exited]
[New Thread -1272058960 (LWP 7550)]
[Thread -1272058960 (LWP 7550) exited]
[New Thread -1272058960 (LWP 7551)]
[Thread -1272058960 (LWP 7551) exited]
[New Thread -1272058960 (LWP 7552)]
[Thread -1272058960 (LWP 7552) exited]
[New Thread -1272058960 (LWP 7553)]
[New Thread -1263666256 (LWP 7554)]
[New Thread -1245606992 (LWP 7555)]
[New Thread -1280472144 (LWP 7556)]
[New Thread -1288864848 (LWP 7557)]
[Thread -1288864848 (LWP 7557) exited]
[New Thread -1288864848 (LWP 7558)]
[Thread -1288864848 (LWP 7558) exited]
[New Thread -1288864848 (LWP 7559)]
[Thread -1288864848 (LWP 7559) exited]
[New Thread -1288864848 (LWP 7560)]
[Thread -1288864848 (LWP 7560) exited]
[New Thread -1288864848 (LWP 7561)]
[Thread -1288864848 (LWP 7561) exited]
[New Thread -1288864848 (LWP 7562)]
[New Thread -1297257552 (LWP 7563)]
[Thread -1280472144 (LWP 7556) exited]
[New Thread -1280472144 (LWP 7564)]
[Thread -1272058960 (LWP 7553) exited]
[Thread -1297257552 (LWP 7563) exited]
[New Thread -1297257552 (LWP 7565)]
[Thread -1297257552 (LWP 7565) exited]
[New Thread -1297257552 (LWP 7566)]
[Thread -1297257552 (LWP 7566) exited]
[New Thread -1297257552 (LWP 7567)]
[Thread -1297257552 (LWP 7567) exited]
[New Thread -1297257552 (LWP 7568)]
[Thread -1297257552 (LWP 7568) exited]
[New Thread -1297257552 (LWP 7569)]
[New Thread -1272058960 (LWP 7570)]
[Thread -1280472144 (LWP 7564) exited]
[New Thread -1280472144 (LWP 7571)]
[Thread -1288864848 (LWP 7562) exited]
[Thread -1272058960 (LWP 7570) exited]
[New Thread -1272058960 (LWP 7572)]
[Thread -1272058960 (LWP 7572) exited]
[New Thread -1272058960 (LWP 7573)]
[Thread -1272058960 (LWP 7573) exited]
[New Thread -1272058960 (LWP 7574)]
[Thread -1272058960 (LWP 7574) exited]
[New Thread -1272058960 (LWP 7575)]
[Thread -1272058960 (LWP 7575) exited]
[New Thread -1272058960 (LWP 7576)]
[New Thread -1288864848 (LWP 7577)]
[New Thread -1305650256 (LWP 7578)]
[Thread -1280472144 (LWP 7571) exited]
[Thread -1305650256 (LWP 7578) exited]
[New Thread -1305650256 (LWP 7579)]
[Thread -1297257552 (LWP 7569) exited]
[Thread -1288864848 (LWP 7577) exited]
[New Thread -1288864848 (LWP 7580)]
[Thread -1288864848 (LWP 7580) exited]
[New Thread -1288864848 (LWP 7583)]
[Thread -1288864848 (LWP 7583) exited]
[New Thread -1288864848 (LWP 7584)]
[Thread -1288864848 (LWP 7584) exited]
[New Thread -1288864848 (LWP 7585)]
[Thread -1288864848 (LWP 7585) exited]
[New Thread -1288864848 (LWP 7586)]
[New Thread -1297257552 (LWP 7587)]
[Thread -1305650256 (LWP 7579) exited]
[New Thread -1305650256 (LWP 7588)]
[Thread -1272058960 (LWP 7576) exited]
[Thread -1297257552 (LWP 7587) exited]
(no debugging symbols found)
(no debugging symbols found)
[New Thread -1297257552 (LWP 7589)]
[Thread -1297257552 (LWP 7589) exited]
[New Thread -1297257552 (LWP 7590)]
[Thread -1297257552 (LWP 7590) exited]
[New Thread -1297257552 (LWP 7591)]
[Thread -1297257552 (LWP 7591) exited]
[New Thread -1297257552 (LWP 7592)]
[Thread -1297257552 (LWP 7592) exited]
[New Thread -1297257552 (LWP 7593)]
[New Thread -1272058960 (LWP 7594)]
[Thread -1288864848 (LWP 7586) exited]
[Thread -1305650256 (LWP 7588) exited]
[New Thread -1305650256 (LWP 7597)]
[New Thread -1288864848 (LWP 7598)]
[Thread -1305650256 (LWP 7597) exited]
[Thread -1288864848 (LWP 7598) exited]
[Thread -1272058960 (LWP 7594) exited]
[Thread -1253999696 (LWP 7538) exited]
[Thread -1245606992 (LWP 7555) exited]
[Thread -1263666256 (LWP 7554) exited]
[Thread -1236653136 (LWP 7527) exited]
[Thread -1297257552 (LWP 7593) exited]

Program exited normally.

I don't understand.
I tried Quodlibet with gstreamer0.8 and it worked perfectly.
I hope I have been clear enouth for english is not my native language. As a matter of fact I live on the other side of the channel.
Thanks.