mp4_amr_wb_176_144_v36_10_a14.sdp
mp4_amr_wb_176_144_v110_15_a20.sdp
mp4_amr_wb_vbr_176_144_v56_12_a14.sdp
mp4_amr_wb_vbr_176_144_v176_20_a24.sdp
mp4_amr_wb_vbr_176_144_v226_25_a24.sdp