bugfix

Signed-off-by: Tomas Neme <lacrymology@gmail.com>
bugfix

Signed-off-by: Tomas Neme <lacrymology@gmail.com>
create a blank clip when a file is not found instead of just dropping it

Signed-off-by: Tomas Neme <lacrymology@gmail.com>
replace broken medias for an equivalent amount of blank medias

(split the broken clip's duration)

Signed-off-by: Tomas Neme <lacrymology@gmail.com>