auto c = _parent->selected_text ();
DCPOMATIC_ASSERT (c.size() == 1);
auto decoder = decoder_factory (_parent->film(), c.front(), false, false, shared_ptr<Decoder>());
if (decoder) {
auto c = _parent->selected_text ();
DCPOMATIC_ASSERT (c.size() == 1);
auto decoder = decoder_factory (_parent->film(), c.front(), false, false, shared_ptr<Decoder>());
if (decoder) {