Nice error when trying to import unsupported music codec

Right now it spew a traceback:

root@api:/app# python manage.py import_files "/music/Bossfight/**/*.m4a" --recursive --noinput --no-acoustid /usr/local/lib/python3.5/site-packages/psycopg2/__init__.py:144: UserWarning: The psycopg2 wheel package will be renamed from release 2.8; in order to keep installing from binary please use "pip install psycopg2-binary" instead. For details see: <http://initd.org/psycopg/docs/install.html#binary-install-from-pypi>. """) This will import 15 files matching this pattern: /music/Bossfight/**/*.m4a Traceback (most recent call last): File "manage.py", line 13, in <module> execute_from_command_line(sys.argv) File "/usr/local/lib/python3.5/site-packages/django/core/management/__init__.py", line 371, in execute_from_command_line utility.execute() File "/usr/local/lib/python3.5/site-packages/django/core/management/__init__.py", line 365, in execute self.fetch_command(subcommand).run_from_argv(self.argv) File "/usr/local/lib/python3.5/site-packages/django/core/management/base.py", line 288, in run_from_argv self.execute(*args, **cmd_options) File "/usr/local/lib/python3.5/site-packages/django/core/management/base.py", line 335, in execute output = self.handle(*args, **options) File "/app/funkwhale_api/providers/audiofile/management/commands/import_files.py", line 90, in handle batch = self.do_import(matching, user=user, options=options) File "/usr/local/lib/python3.5/contextlib.py", line 30, in inner return func(*args, **kwds) File "/usr/local/lib/python3.5/site-packages/django/db/transaction.py", line 256, in __exit__ connection.set_autocommit(True) File "/usr/local/lib/python3.5/site-packages/django/db/backends/base/base.py", line 409, in set_autocommit self.run_and_clear_commit_hooks() File "/usr/local/lib/python3.5/site-packages/django/db/backends/base/base.py", line 636, in run_and_clear_commit_hooks func() File "/app/funkwhale_api/common/utils.py", line 26, in <lambda> lambda: f(*args, **kwargs) File "/usr/local/lib/python3.5/site-packages/celery/local.py", line 191, in __call__ return self._get_current_object()(*a, **kw) File "/usr/local/lib/python3.5/site-packages/celery/app/task.py", line 380, in __call__ return self.run(*args, **kwargs) File "/app/funkwhale_api/taskapp/celery.py", line 41, in inner return function(*args, **kwargs) File "/app/funkwhale_api/music/tasks.py", line 93, in import_job_run self.retry(exc=exc, countdown=30, max_retries=3) File "/usr/local/lib/python3.5/site-packages/celery/app/task.py", line 653, in retry raise_with_context(exc or Retry('Task can be retried', None)) File "/app/funkwhale_api/music/tasks.py", line 89, in import_job_run return _do_import(import_job, replace, use_acoustid=use_acoustid) File "/app/funkwhale_api/music/tasks.py", line 47, in _do_import track = import_track_data_from_path(import_job.audio_file.path) File "/app/funkwhale_api/providers/audiofile/tasks.py", line 12, in import_track_data_from_path data = metadata.Metadata(path) File "/app/funkwhale_api/music/metadata.py", line 124, in __init__ self._conf = CONF[self.get_file_type(self._file)] KeyError: 'MP4' Sentry is attempting to send 1 pending error messages Waiting up to 10 seconds Press Ctrl-C to quit root@api:/app#