float speed = percent / 100.0f;
ui->speed_lock_btn->setText(QString::fromStdString(" " + to_string(percent) + "%"));
live_player->set_master_speed(speed);
float speed = percent / 100.0f;
ui->speed_lock_btn->setText(QString::fromStdString(" " + to_string(percent) + "%"));
live_player->set_master_speed(speed);