+ _audio_length += (*i)->main_sound()->duration();
+ }
+
+ if ((*i)->main_subtitle ()) {
+ _has_subtitles = true;
+ }
+ }
+
+ _encrypted = dcp.encrypted ();
+ _kdm_valid = true;
+
+ /* Check that we can read the first picture frame */
+ try {
+ if (!dcp.cpls().empty () && !dcp.cpls().front()->reels().empty ()) {
+ shared_ptr<dcp::PictureAsset> asset = dcp.cpls().front()->reels().front()->main_picture()->asset ();
+ shared_ptr<dcp::MonoPictureAsset> mono = dynamic_pointer_cast<dcp::MonoPictureAsset> (asset);
+ shared_ptr<dcp::StereoPictureAsset> stereo = dynamic_pointer_cast<dcp::StereoPictureAsset> (asset);
+
+ if (mono) {
+ mono->get_frame(0)->xyz_image ();
+ } else {
+ stereo->get_frame(0)->xyz_image (dcp::EYE_LEFT);
+ }
+
+ }
+ } catch (dcp::DCPReadError& e) {
+ _kdm_valid = false;
+ if (_encrypted && content->kdm ()) {
+ /* XXX: maybe don't use an exception for this */
+ throw StringError (_("The KDM does not decrypt the DCP. Perhaps it is targeted at the wrong CPL"));