Audio Codecs
A number of API functions take encoding as an argument. The table below lists the supprted values of the argument and the associated codecs.
| Value | Associated Codec |
|---|---|
| 0 | G.711 uLaw, 64 kBit/s, 1 frame(s) per packet by default (audio: 8 kHz/Mono/16 Bit, frame: 10 ms/80 bytes) |
| 1 | G.711 uLaw, 64 kBit/s, 2 frame(s) per packet by default (audio: 8 kHz/Mono/16 Bit, frame: 10 ms/80 bytes) |
| 2 | G.711 uLaw, 64 kBit/s, 4 frame(s) per packet by default (audio: 8 kHz/Mono/16 Bit, frame: 10 ms/80 bytes) |
| 3 | G.711 aLaw, 64 kBit/s, 1 frame(s) per packet by default (audio: 8 kHz/Mono/16 Bit, frame: 10 ms/80 bytes) |
| 4 | G.711 aLaw, 64 kBit/s, 2 frame(s) per packet by default (audio: 8 kHz/Mono/16 Bit, frame: 10 ms/80 bytes) |
| 5 | G.711 aLaw, 64 kBit/s, 4 frame(s) per packet by default (audio: 8 kHz/Mono/16 Bit, frame: 10 ms/80 bytes) |
| 6 | G.723.1, 6.3 kBit/s, 1 frame(s) per packet by default (audio: 8 kHz/Mono/16 Bit, frame: 30 ms/24 bytes) |
| 7 | G.723.1, 6.3 kBit/s, 2 frame(s) per packet by default (audio: 8 kHz/Mono/16 Bit, frame: 30 ms/24 bytes) |
| 8 | G.723.1, 6.3 kBit/s, 3 frame(s) per packet by default (audio: 8 kHz/Mono/16 Bit, frame: 30 ms/24 bytes) |
| 9 | G.723.1, 5.3 kBit/s, 1 frame(s) per packet by default (audio: 8 kHz/Mono/16 Bit, frame: 30 ms/20 bytes) |
| 10 | G.723.1, 5.3 kBit/s, 2 frame(s) per packet by default (audio: 8 kHz/Mono/16 Bit, frame: 30 ms/20 bytes) |
| 11 | G.723.1, 5.3 kBit/s, 3 frame(s) per packet by default (audio: 8 kHz/Mono/16 Bit, frame: 30 ms/20 bytes) |
| 12 | GSM 06.10, 13 kBit/s, 1 frame(s) per packet by default (audio: 8 kHz/Mono/16 Bit, frame: 20 ms/33 bytes, RPE/LTP, aka GSM-FR) |
| 13 | LPC-10, 2.4 kBit/s, 1 frame(s) per packet by default (audio: 8 kHz/Mono/16 Bit, frame: 22.5 ms/8 bytes) |
| 14 | G.729a, 8 kBit/s, 1 frame(s) per packet by default (audio: 8 kHz/Mono/16 Bit, frame: 10 ms/10 bytes) |
| 15 | G.729a, 8 kBit/s, 2 frame(s) per packet by default (audio: 8 kHz/Mono/16 Bit, frame: 10 ms/10 bytes) |
| 16 | G.729a, 8 kBit/s, 3 frame(s) per packet by default (audio: 8 kHz/Mono/16 Bit, frame: 10 ms/10 bytes) |
| 17 | G.729a, 8 kBit/s, 4 frame(s) per packet by default (audio: 8 kHz/Mono/16 Bit, frame: 10 ms/10 bytes) |
| 18 | AMR, 4.75 kBit/s, octet-aligned, 1 frame(s) per packet by default (audio: 8 kHz/Mono/16 Bit, frame: 20 ms/14 bytes) |
| 19 | AMR, 5.15 kBit/s, octet-aligned, 1 frame(s) per packet by default (audio: 8 kHz/Mono/16 Bit, frame: 20 ms/15 bytes) |
| 20 | AMR, 5.90 kBit/s, octet-aligned, 1 frame(s) per packet by default (audio: 8 kHz/Mono/16 Bit, frame: 20 ms/17 bytes) |
| 21 | AMR, 6.70 kBit/s, octet-aligned, 1 frame(s) per packet by default (audio: 8 kHz/Mono/16 Bit, frame: 20 ms/19 bytes, aka PDC-EFR) |
| 22 | AMR, 7.40 kBit/s, octet-aligned, 1 frame(s) per packet by default (audio: 8 kHz/Mono/16 Bit, frame: 20 ms/21 bytes, aka TDMA-EFR) |
| 23 | AMR, 7.95 kBit/s, octet-aligned, 1 frame(s) per packet by default (audio: 8 kHz/Mono/16 Bit, frame: 20 ms/22 bytes) |
| 24 | AMR, 10.2 kBit/s, octet-aligned, 1 frame(s) per packet by default (audio: 8 kHz/Mono/16 Bit, frame: 20 ms/28 bytes) |
| 25 | AMR, 12.2 kBit/s, octet-aligned, 1 frame(s) per packet by default (audio: 8 kHz/Mono/16 Bit, frame: 20 ms/33 bytes, aka GSM-EFR) |
| 26 | AMR, 4.75 kBit/s, bandwidth-efficient, 1 frame(s) per packet by default (audio: 8 kHz/Mono/16 Bit, frame: 20 ms/14 bytes) |
| 27 | AMR, 5.15 kBit/s, bandwidth-efficient, 1 frame(s) per packet by default (audio: 8 kHz/Mono/16 Bit, frame: 20 ms/15 bytes) |
| 28 | AMR, 5.90 kBit/s, bandwidth-efficient, 1 frame(s) per packet by default (audio: 8 kHz/Mono/16 Bit, frame: 20 ms/16 bytes) |
| 29 | AMR, 6.70 kBit/s, bandwidth-efficient, 1 frame(s) per packet by default (audio: 8 kHz/Mono/16 Bit, frame: 20 ms/18 bytes, aka PDC-EFR) |
| 30 | AMR, 7.40 kBit/s, bandwidth-efficient, 1 frame(s) per packet by default (audio: 8 kHz/Mono/16 Bit, frame: 20 ms/20 bytes, aka TDMA-EFR) |
| 31 | AMR, 7.95 kBit/s, bandwidth-efficient, 1 frame(s) per packet by default (audio: 8 kHz/Mono/16 Bit, frame: 20 ms/22 bytes) |
| 32 | AMR, 10.2 kBit/s, bandwidth-efficient, 1 frame(s) per packet by default (audio: 8 kHz/Mono/16 Bit, frame: 20 ms/27 bytes) |
| 33 | AMR, 12.2 kBit/s, bandwidth-efficient, 1 frame(s) per packet by default (audio: 8 kHz/Mono/16 Bit, frame: 20 ms/32 bytes, aka GSM-EFR) |
| 34 | AMR-WB, 6.60 kBit/s, octet-aligned, 1 frame(s) per packet by default (audio: 16 kHz/Mono/16 Bit, frame: 20 ms/19 bytes) |
| 35 | AMR-WB, 8.85 kBit/s, octet-aligned, 1 frame(s) per packet by default (audio: 16 kHz/Mono/16 Bit, frame: 20 ms/25 bytes) |
| 36 | AMR-WB, 12.65 kBit/s, octet-aligned, 1 frame(s) per packet by default (audio: 16 kHz/Mono/16 Bit, frame: 20 ms/34 bytes) |
| 37 | AMR-WB, 14.25 kBit/s, octet-aligned, 1 frame(s) per packet by default (audio: 16 kHz/Mono/16 Bit, frame: 20 ms/38 bytes) |
| 38 | AMR-WB, 15.85 kBit/s, octet-aligned, 1 frame(s) per packet by default (audio: 16 kHz/Mono/16 Bit, frame: 20 ms/42 bytes) |
| 39 | AMR-WB, 18.25 kBit/s, octet-aligned, 1 frame(s) per packet by default (audio: 16 kHz/Mono/16 Bit, frame: 20 ms/48 bytes) |
| 40 | AMR-WB, 19.85 kBit/s, octet-aligned, 1 frame(s) per packet by default (audio: 16 kHz/Mono/16 Bit, frame: 20 ms/52 bytes) |
| 41 | AMR-WB, 23.05 kBit/s, octet-aligned, 1 frame(s) per packet by default (audio: 16 kHz/Mono/16 Bit, frame: 20 ms/60 bytes) |
| 42 | AMR-WB, 23.85 kBit/s, octet-aligned, 1 frame(s) per packet by default (audio: 16 kHz/Mono/16 Bit, frame: 20 ms/62 bytes) |
| 43 | AMR-WB, 6.60 kBit/s, bandwidth-efficient, 1 frame(s) per packet by default (audio: 16 kHz/Mono/16 Bit, frame: 20 ms/18 bytes) |
| 44 | AMR-WB, 8.85 kBit/s, bandwidth-efficient, 1 frame(s) per packet by default (audio: 16 kHz/Mono/16 Bit, frame: 20 ms/24 bytes) |
| 45 | AMR-WB, 12.65 kBit/s, bandwidth-efficient, 1 frame(s) per packet by default (audio: 16 kHz/Mono/16 Bit, frame: 20 ms/33 bytes) |
| 46 | GAMR-WB, 14.25 kBit/s, bandwidth-efficient, 1 frame(s) per packet by default (audio: 16 kHz/Mono/16 Bit, frame: 20 ms/37 bytes) |
| 47 | AMR-WB, 15.85 kBit/s, bandwidth-efficient, 1 frame(s) per packet by default (audio: 16 kHz/Mono/16 Bit, frame: 20 ms/41 bytes) |
| 48 | AMR-WB, 18.25 kBit/s, bandwidth-efficient, 1 frame(s) per packet by default (audio: 16 kHz/Mono/16 Bit, frame: 20 ms/47 bytes) |
| 49 | AMR-WB, 19.85 kBit/s, bandwidth-efficient, 1 frame(s) per packet by default (audio: 16 kHz/Mono/16 Bit, frame: 20 ms/51 bytes) |
| 50 | AMR-WB, 23.05 kBit/s, bandwidth-efficient, 1 frame(s) per packet by default (audio: 16 kHz/Mono/16 Bit, frame: 20 ms/59 bytes) |
| 51 | AMR-WB, 23.85 kBit/s, bandwidth-efficient, 1 frame(s) per packet by default (audio: 16 kHz/Mono/16 Bit, frame: 20 ms/61 bytes) |
| 52 | G.722, 64 kBit/s, 2 frame(s) per packet by default (audio: 16 kHz/Mono/16 Bit, frame: 10 ms/80 bytes) |
| 53 | G.722, 56 kBit/s, 2 frame(s) per packet by default (audio: 16 kHz/Mono/16 Bit, frame: 10 ms/80 bytes) |
| 54 | G.722, 48 kBit/s, 2 frame(s) per packet by default (audio: 16 kHz/Mono/16 Bit, frame: 10 ms/80 bytes) |
| 55 | AMR, 4.75 kBit/s, over IuUP, 1 frame(s) per packet by default (audio: 8 kHz/Mono/16 Bit, frame: 20 ms/14 bytes) |
| 56 | AMR, 5.15 kBit/s, over IuUP, 1 frame(s) per packet by default (audio: 8 kHz/Mono/16 Bit, frame: 20 ms/15 bytes) |
| 57 | AMR, 5.90 kBit/s, over IuUP, 1 frame(s) per packet by default (audio: 8 kHz/Mono/16 Bit, frame: 20 ms/17 bytes) |
| 58 | AMR, 6.70 kBit/s, over IuUP, 1 frame(s) per packet by default (audio: 8 kHz/Mono/16 Bit, frame: 20 ms/19 bytes) |
| 59 | AMR, 7.40 kBit/s, over IuUP, 1 frame(s) per packet by default (audio: 8 kHz/Mono/16 Bit, frame: 20 ms/21 bytes) |
| 60 | AMR, 7.95 kBit/s, over IuUP, 1 frame(s) per packet by default (audio: 8 kHz/Mono/16 Bit, frame: 20 ms/22 bytes) |
| 61 | AMR, 10.2 kBit/s, over IuUP, 1 frame(s) per packet by default (audio: 8 kHz/Mono/16 Bit, frame: 20 ms/28 bytes) |
| 62 | AMR, 12.2 kBit/s, over IuUP, 1 frame(s) per packet by default (audio: 8 kHz/Mono/16 Bit, frame: 20 ms/33 bytes) |
| 63 | AMR-WB, 6.60 kBit/s, over IuUP, 1 frame(s) per packet by default (audio: 16 kHz/Mono/16 Bit, frame: 20 ms/19 bytes) |
| 64 | AMR-WB, 8.85 kBit/s, over IuUP, 1 frame(s) per packet by default (audio: 16 kHz/Mono/16 Bit, frame: 20 ms/25 bytes) |
| 65 | AMR-WB, 12.65 kBit/s, over IuUP, 1 frame(s) per packet by default (audio: 16 kHz/Mono/16 Bit, frame: 20 ms/34 bytes) |
| 66 | AMR-WB, 14.25 kBit/s, over IuUP, 1 frame(s) per packet by default (audio: 16 kHz/Mono/16 Bit, frame: 20 ms/38 bytes) |
| 67 | AMR-WB, 15.85 kBit/s, over IuUP, 1 frame(s) per packet by default (audio: 16 kHz/Mono/16 Bit, frame: 20 ms/42 bytes) |
| 68 | AMR-WB, 18.25 kBit/s, over IuUP, 1 frame(s) per packet by default (audio: 16 kHz/Mono/16 Bit, frame: 20 ms/48 bytes) |
| 69 | AMR-WB, 19.85 kBit/s, over IuUP, 1 frame(s) per packet by default (audio: 16 kHz/Mono/16 Bit, frame: 20 ms/52 bytes) |
| 70 | AMR-WB, 23.05 kBit/s, over IuUP, 1 frame(s) per packet by default (audio: 16 kHz/Mono/16 Bit, frame: 20 ms/60 bytes) |
| 71 | AMR-WB, 23.85 kBit/s, over IuUP, 1 frame(s) per packet by default (audio: 16 kHz/Mono/16 Bit, frame: 20 ms/62 bytes) |