Comments (9)
jodal
commented on May 24, 2024
If the changes discussed in http://bugs.python.org/issue8713 had been available, it would solve this issue.
We use multiprocessing.Process to create subprocesses, which are done with fork() on Linux. If we could have forced multiprocessing to use exec(), then gstreamer would have access to CoreFoundation.
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jodal
commented on May 24, 2024
I'm planning on moving GStreamerProcess into a thread in the main process to solve this issue.
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jodal
commented on May 24, 2024
Work on this issue is to be found in the feature/threads-not-processes branch.
Current state of the branch:
- Everything runs in threads in a single process. Threads subclasses
multiprocessing.dummy.Processinstead ofthreading.Thread, as this makesmultiprocessing.Queueuse automatically "safe". - The GStreamer + CoreFoundation problems on OS X is gone.
- New GStreamer problems has arisen (i.e. pipeline problems), but this is probably mostly related to the GStreamer installation on the machine.
- Old segfaults when e.g. doing libspotify searches are back.
In other words this is far from done and will be merged in 0.1.1 or more probably 0.2.0.
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jodal
commented on May 24, 2024
The feature/threads-not-process branch has been merged into develop as of rev 71014be.
There are no know regressions on Ubuntu due to the merging of this branch.
The two last items in the previous comment are still valid for OS X. In other words, GStreamer pipeline errors and segfaults at libspotify search are still present at OS X, but the CoreFoundation issue has been resolved.
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jodal
commented on May 24, 2024
The segfaults when doing libspotify searches are fixed by the pyspotify patch in http://github.com/winjer/pyspotify/issues/#issue/1 in combination with 4284366.
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jodal
commented on May 24, 2024
The only remaining issue here is the GStreamer problems:
jodal@iota:~/dev/mopidy:develop$ GST_DEBUG_NO_COLOR=1 GST_DEBUG=2 python mopidy
INFO -- Starting Mopidy --
** Message: pygobject_register_sinkfunc is deprecated (GstObject)
INFO Mopidy uses SPOTIFY(R) CORE
INFO MPD server running at [::]:6600
INFO Connected to Last.fm
INFO Connected to Spotify
INFO MPD client connection from [::ffff:10.37.3.10]:57006
INFO MPD client connection from [::ffff:10.37.3.10]:57007
INFO MPD client connection from [::ffff:10.37.3.10]:57008
INFO MPD client connection from [::ffff:10.37.3.10]:57009
INFO MPD client connection from [::ffff:10.37.3.10]:57010
INFO MPD client connection from [::ffff:10.37.3.10]:57011
INFO MPD client connection from [::ffff:10.37.3.10]:57012
0:00:14.401201000 3288 0x104209980 WARN basetransform gstbasetransform.c:2073:gst_base_transform_handle_buffer:<convert> error: not negotiated
0:00:14.401236000 3288 0x104209980 WARN basetransform gstbasetransform.c:2073:gst_base_transform_handle_buffer:<convert> error: not negotiated
0:00:14.401293000 3288 0x104209980 WARN basesrc gstbasesrc.c:2550:gst_base_src_loop:<src> error: Internal data flow error.
0:00:14.401304000 3288 0x104209980 WARN basesrc gstbasesrc.c:2550:gst_base_src_loop:<src> error: streaming task paused, reason not-negotiated (-4)
ERROR Element doesn't implement handling of this stream. Please file a bug. gstbasetransform.c(2073): gst_base_transform_handle_buffer (): /GstPipeline:pipeline0/GstAudioConvert:convert:
not negotiated
Accidently, this is the exact same error as we see on Ubuntu 10.10 in issue #24. Thus, fixing this will fix Mopidy support on both Ubuntu 10.10 and OS X.
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jodal
commented on May 24, 2024
After the fix for #24 was applied, Mopidy on OS X gets a step further and fails on this when trying to play a track:
jodal@iota:~/dev/mopidy:develop$ GST_DEBUG_NO_COLOR=1 GST_DEBUG=2 python mopidy
INFO -- Starting Mopidy --
** Message: pygobject_register_sinkfunc is deprecated (GstObject)
INFO Mopidy uses SPOTIFY(R) CORE
INFO Connected to Last.fm
INFO MPD server running at [::]:6600
INFO Connected to Spotify
INFO MPD client connection from [::ffff:10.37.3.10]:48601
0:00:52.278484000 15391 0x104737370 WARN basetransform gstbasetransform.c:1065:gst_base_transform_acceptcaps_default:<volume> transform could not transform 0x10098a240 in anything we support
Segmentation fault
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jodal
commented on May 24, 2024
I'm marking this bug as resolved in the develop branch, as the original issue has been solved. I'll open a new bug report for the current issue blocking OS X support.
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jodal
commented on May 24, 2024
This is fixed in 0.2.0. Closing.
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