void set_reencode_j2k (bool);
void set_marker (dcp::Marker type, dcpomatic::DCPTime time);
void unset_marker (dcp::Marker type);
void set_reencode_j2k (bool);
void set_marker (dcp::Marker type, dcpomatic::DCPTime time);
void unset_marker (dcp::Marker type);