mp4_amr_wb_128_96_v64_12_a16.sdp
mp4_amr_wb_128_96_v130_20_a20.sdp
mp4_amr_wb_vbr_128_96_v37_10_a13.sdp
mp4_amr_wb_vbr_128_96_v104_15_a16.sdp
mp4_amr_wb_vbr_128_96_v177_25_a23.sdp