h263_aac+_128_96_v34_10_a16_32_m.sdp
h263_aac+_128_96_v64_12_a16_44_m.sdp
h263_aac+_128_96_v152_25_a48_48_s.sdp
h263_aac+_vbr_128_96_v96_15_a24_32_s.sdp
h263_aac+_vbr_128_96_v138_20_a32_44_s.sdp