[discoverer] Files that report a duration of 0s is BUGGY !!!
@bilboed
Submitted by Edward Hervey Assigned to Edward Hervey @bilboed
Description
some files (flv files for example) report durations of 0s in the discoverer.
We should consider those files as being buggy, not use them and raise an error.
Imported from https://bugzilla.gnome.org/show_bug.cgi?id=432678