Transcodable Codec Details
The following table lists the supported codecs, bit rates, RTP payload type, default ptime, and supported ptimes. See the Release Notes for which transcoding platforms support specific codecs.
| Codec | Supported Bit Rate (kbps) | RTP Payload Type | Default Ptime (ms) | Supported Ptime (ms) |
|---|---|---|---|---|
| G.711 PCMU | 64 | 0 | 20 | 10, 20, 30, 40, 50, 60 |
| G.711 PCMA | 64 | 8 | 20 | 10, 20, 30, 40, 50, 60 |
| G.722 | 48, 56, 64 | 9 | 20 | 10, 20, 30, 40 |
| G.723.1 | 5.3, 6.3 | 4 | 30 | 30, 60, 90 |
| G.726 | 16, 24, 32, 40 | 2, 96-127 | 20 | 10, 20, 30, 40, 50 |
| iLBC | 13.33 | 96-127 | 20 | 20, 30, 40, 60 |
| 15.2 | 96-127 | 30 | 20, 30, 40, 60 | |
| G.729/A/B | 8 | 18 | 20 | 10, 20, 30, 40, 50, 60, 70, 80, 90 |
| AMR | 4.75, 5.15, 5.90, 6.70, 7.40, 7.95, 10.2, 12.2 | 96-127 | 20 | 20, 40, 60, 80, 100 |
| AMR-WB (G.722.2) | 6.6, 8.85, 12.65, 14.25, 15.85, 18.25, 19.85, 23.05, 23.85 | 96-127 | 20 | 20, 40, 60, 80, 100 |
| GSM FR | 13 | 3 | 20 | 20 |
| T.38 | 4.8, 9.6, 14.4 | N/A | 10, 20, 30 | |
| Opus | 48 | 104 | 20 | 10, 20, 40, 60, 80, 100 |
| EVRC | 0.8, 4.0, 8.55 | 96-127 | 20 | 20, 40, 60 |
| EVRC0 | 0.8, 4.0, 8.55 | 96-127 | 20 | 20 |
| EVRC1 | 4.0, 8.55 | 96-127 | 20 | 20, 40, 60, 80, 100 |
| EVRCB | 0.8, 2.0, 4.0, 8.55 | 96-127 | 20 | 20 |
| EVRCB0 | 0.8, 2.0, 4.0, 8.55 | 96-127 | 20 | 20 |
| EVRCB1 | 4.0, 8.55 | 96-127 | 20 | 20, 40, 60, 80, 100 |
| SILK | 6.0 to 40 | 96-127 | 20 | 20, 40, 60, 80, 100 |
See the EVS Supported Options section for EVS information.
See theSILK Codec Transcoding Support section for SILK information.