KeyError u'ALBUM_GAIN'

[petwri]

I'm on Ubuntu 15.10, python 2.7.10, beets 1.3.16. When running the replaygain plugin, I occasionally get this error (depending on the album I am analyzing):

Traceback (most recent call last):
  File "/usr/local/bin/beet", line 9, in <module>
    load_entry_point('beets==1.3.16', 'console_scripts', 'beet')()
  File "/usr/local/lib/python2.7/dist-packages/beets/ui/__init__.py", line 1207, in main
    _raw_main(args)
  File "/usr/local/lib/python2.7/dist-packages/beets/ui/__init__.py", line 1197, in _raw_main
    subcommand.func(lib, suboptions, subargs)
  File "/usr/local/lib/python2.7/dist-packages/beetsplug/replaygain.py", line 932, in func
    self.handle_album(album, write)
  File "/usr/local/lib/python2.7/dist-packages/beetsplug/replaygain.py", line 864, in handle_album
    album_gain = self.backend_instance.compute_album_gain(album)
  File "/usr/local/lib/python2.7/dist-packages/beetsplug/replaygain.py", line 505, in compute_album_gain
    return AlbumGain(Gain(last_tags["ALBUM_GAIN"],
KeyError: u'ALBUM_GAIN'

Can provide more information if required.

[sampsyo]

Can you please provide instructions for reproducing this? Specifically, how is your RG plugin configured, and what files trigger the problem?

[petwri]

Ok, here's the excerpt from my config.yaml

replaygain: auto: no backend: gstreamer overwrite: no

Running 'beet replaygain -a' produces the error. I just realized that every once in a while, #1841 happens. So I assume this is also due to a gstreamer problem.

[petwri]

Ok, I just found that simply re-running the command solves the issue. After every start of 'beet replaygain -a', gstreamer complains about a different file. At some point, it then just finishes.

[sampsyo]

That's incredibly weird!

In any case, I just added some error handling for this case. If you can, please try that out and see if the crash goes away.

[petwri]

I assume the fix you just added is only for the latest version on github. I am still on beets 1.3.16, installed via pip. I guess an upgrade would be required.

[petwri]

Just found out, that when the gstreamer error always keeps coming up with the same file, running 'beet replaygain' without the -a flag works:

beet replaygain -a
replaygain: ReplayGain error: Error GLib.Error('GStreamer encountered a general stream error.', 'gst-stream-error-quark', 1) - 'gstbaseparse.c(3457): gst_base_parse_loop (): /GstPipeline:pipeline0/GstDecodeBin:decbin/GstMpegAudioParse:mpegaudioparse1:\nstreaming stopped, reason error' on file '/media/Music/Cage the Elephant/Cage the Elephant/01-02 James Brown.mp3'

while

beet replaygain
replaygain: analyzing Cage the Elephant - Cage the Elephant - James Brown

finished with no errors.

[sampsyo]

The FAQ has instructions for running the latest source.

Thanks for the extra info.

[petwri]

Just updated to the latest version from github. So far, the files that failed before, seem to work now. I will watch this whole issue, if the error mentioned above occurs again, I will post the output here.

[petwri]

For some files, the gstreamer error keeps coming up, I filed a bug report on their bugzilla page (https://bugzilla.gnome.org/show_bug.cgi?id=761540)

[sampsyo]

Good call. Here's hoping something comes out of the gstreamer bug.