idpf_set_q_coalesce
err = idpf_set_q_coalesce(vport, q_coal, ec, i, false);
err = idpf_set_q_coalesce(vport, q_coal, ec, i, true);
err = idpf_set_q_coalesce(vport, q_coal, ec, q_num, false);
err = idpf_set_q_coalesce(vport, q_coal, ec, q_num, true);