if (output == Mixer::OUTPUT_LIVE) {
global_mixer->set_transition_names_updated_callback(output, [this](const vector<string> &names){
emit transition_names_updated(names);
});
}
if (output >= Mixer::OUTPUT_INPUT0) {
if (output == Mixer::OUTPUT_LIVE) {
global_mixer->set_transition_names_updated_callback(output, [this](const vector<string> &names){
emit transition_names_updated(names);
});
}
if (output >= Mixer::OUTPUT_INPUT0) {