Preparing to unpack .../0-chromium-browser_55.0.2883.87-0ubuntu1.16.10.1330_amd64.deb ...
Unpacking chromium-browser (55.0.2883.87-0ubuntu1.16.10.1330) ...
Selecting previously unselected package chromium-browser-l10n.
Preparing to unpack .../1-chromium-browser-l10n_55.0.2883.87-0ubuntu1.16.10.1330_all.deb ...
Unpacking chromium-browser-l10n (55.0.2883.87-0ubuntu1.16.10.1330) ...
Setting up chromium-browser (55.0.2883.87-0ubuntu1.16.10.1330) ...
Processing triggers for mime-support (3.60ubuntu1) ...
Processing triggers for desktop-file-utils (0.23-1ubuntu1) ...
Processing triggers for man-db (2.7.5-1) ...
Processing triggers for gnome-menus (3.13.3-6ubuntu4) ...
Processing triggers for hicolor-icon-theme (0.15-1) ...
dpkg: error processing package libavformat57:amd64 (--configure):
 package is in a very bad inconsistent state; you should
 reinstall it before attempting configuration
Setting up chromium-browser-l10n (55.0.2883.87-0ubuntu1.16.10.1330) ...