mp4_aac+_176_144_v34_10_a16_32_m.sdp
mp4_aac+_176_144_v106_15_a24_44_s.sdp
mp4_aac+_176_144_v148_15_a32_44_m.sdp
mp4_aac+_176_144_v218_25_a32_48_s.sdp
mp4_aac+_vbr_176_144_v46_12_a24_32_s.sdp
mp4_aac+_vbr_176_144_v168_20_a32_48_m.sdp
mp4_aac+_vbr_176_144_v252_30_a48_48_s.sdp