Audio Codecs
OPUS
The OPUS codec is supported when streaming in RTSP(S), SRT, and Multicast UDP protocols. If you will be viewing the stream in a web browser via WebRTC, use this codec for the best quality.
AAC
AAC is supported in all streaming protocols. If you will be viewing the stream in a web browser make sure to view it via HLS. HLS supports AAC audio while WebRTC does not.
G711
The G711 codec is locked to a sample rate of 8000hz and mono audio. Both RTSP(S) and RTMP(S) support G711 while SRT does not.
Compatibility Matrix
| OPUS | AAC | G711 | |
|---|---|---|---|
| RTSP(S) | Yes | Yes | Yes |
| RTMP(S) | No | Yes | Yes |
| SRT | Yes | Yes | No |
| Multicast UDP | Yes | Yes | No |