.. MediaGoblin Documentation Written in 2011, 2012, 2013, 2020, 2021 by MediaGoblin contributors To the extent possible under law, the author(s) have dedicated all copyright and related and neighboring rights to this software to the public domain worldwide. This software is distributed without any warranty. You should have received a copy of the CC0 Public Domain Dedication along with this software. If not, see . .. _troubleshooting-chapter: =============== Troubleshooting =============== Sometimes it doesn't all go to plan! This page describes some of the problems that community members have reported and how to fix them. TypeError: object() takes no parameters --------------------------------------- Backtrace:: 2021-04-04 06:04:55,244 WARNING [mediagoblin.processing] No idea what happened here, but it failed: TypeError('object() takes no parameters',) 2021-04-04 06:04:55,262 ERROR [waitress] Exception while serving /submit/ ... File "/opt/mediagoblin/mediagoblin/media_types/video/transcoders.py", line 338, in __setup_videoscale_capsfilter caps_struct.set_value('pixel-aspect-ratio', Gst.Fraction(1, 1)) TypeError: object() takes no parameters This is caused by not having the package python3-gst-1.0 on Debian: http://gstreamer-devel.966125.n4.nabble.com/How-to-use-Gst-Fraction-in-python-td4679228.html alembic.util.exc.CommandError: Can't locate revision identified by 'e9212d3a12d3' --------------------------------------------------------------------------------- This is caused when you've enabled a plugin, run dbupdate and then disabled the plugin again. Currently we recommend reinstalling the plugin, but we understand this is not ideal. See the outstanding issue raised here: https://issues.mediagoblin.org/ticket/5447 It's possible that manually manipulating the ``alembic_version`` table may help you, but that approach is only recommended for experienced developers.