+ shared_ptr<DCPDecoder> decoder;
+ try {
+ decoder.reset (new DCPDecoder (shared_from_this(), film()->log()));
+ } catch (dcp::DCPReadError) {
+ /* We couldn't read the DCP, so it's probably missing */
+ return false;
+ }
+
+ BOOST_FOREACH (shared_ptr<dcp::Reel> i, decoder->reels()) {
+ if (!i->main_subtitle()) {
+ why_not.push_back (_("The DCP does not have subtitles in all reels."));
+ return false;
+ }
+ }
+
+ return can_reference (bind (&Content::subtitle, _1), _("There is other subtitle content overlapping this DCP; remove it."), why_not);