@seydx/rtsp

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@seydx/rtsp / BackchannelSource

Interface: BackchannelSource ​

Defined in: types.ts:222

A source that can accept talkback audio back upstream.

Implemented by sources whose upstream supports a backchannel, such as an RTSP camera with an ONVIF backchannel. When a viewer sends audio, the relay forwards it through this capability so it reaches the upstream device. Use supportsBackchannel to detect whether a given source implements it.

Example ​

typescript
import { supportsBackchannel } from '@seydx/rtsp';

if (supportsBackchannel(source)) {
  source.sendBackchannel(rtpPacket);
}

See ​

Properties ​

backchannel? ​

readonly optional backchannel?: BackchannelInfo

Defined in: types.ts:229

The negotiated backchannel format, once known.

Present only after the upstream is open and has advertised a backchannel; remains undefined while closed or when the upstream offers no talkback.

Methods ​

sendBackchannel() ​

sendBackchannel(rtp): void

Defined in: types.ts:245

Send one RTP packet upstream over the backchannel.

The packet must already be encoded in the backchannel codec and packetized as RTP matching BackchannelInfo; the source forwards it verbatim to the upstream.

Parameters ​

rtp ​

Buffer

A single RTP packet, already in the backchannel codec

Returns ​

void

Example ​

typescript
source.sendBackchannel(rtpPacket);