2015-10-20 11:28:28,177 | ERROR | (MediaInspector:162) - Unable to find mimetype for /srv/opencast-karaf-dist-allinone-2.1.0-beta1/data/opencast/workspace/collection/composer/1674.mkv
@Edmore: Afaik, you fixed this already for 1.x.
Can you have a look at the problem for 2.x as well?