mp4_amr_vbr_128_96_v48_10_a12.3gp
mp4_amr_vbr_128_96_v78_15_a12.3gp
mp4_amr_vbr_128_96_v118_15_a12.3gp
mp4_amr_vbr_128_96_v148_20_a12.3gp
mp4_amr_vbr_128_96_v168_25_a12.3gp