mp4_amr_176_144_v63_12_a74.sdp
mp4_amr_176_144_v180_15_a12.sdp
mp4_amr_176_144_v250_20_a12.sdp
mp4_amr_176_144_v300_25_a12.sdp
mp4_amr_176_144_v384_30_a12.sdp
mp4_amr_vbr_176_144_v45_10_a475.sdp
mp4_amr_vbr_176_144_v108_15_a12.sdp