_encrypted = f.bool_child ("Encrypted");
_audio_channels = f.number_child<int> ("AudioChannels");
_sequence_video = f.bool_child ("SequenceVideo");
_three_d = f.bool_child ("ThreeD");
_interop = f.bool_child ("Interop");
_key = libdcp::Key (f.string_child ("Key"));
_encrypted = f.bool_child ("Encrypted");
_audio_channels = f.number_child<int> ("AudioChannels");
_sequence_video = f.bool_child ("SequenceVideo");
_three_d = f.bool_child ("ThreeD");
_interop = f.bool_child ("Interop");
_key = libdcp::Key (f.string_child ("Key"));