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Another option is to use external or internal TURN server or publish a stream via RTMP or RTSP.
Redundancy support while publishing audio
Since build 5.2.1969 a redundancy is supported while publishing audio data (RED, RFC2198). This allows to reduce audio packet loss when using opus codec. The feature may be enabled with the following parameter
| Code Block | ||
|---|---|---|
| ||
codecs=red,opus,alaw,ulaw,g729,speex16,g722,mpeg4-generic,telephone-event,h264,vp8,flv,mpv |
Note that red codec should be set before opus codec. In this case a browser supporting RED will send a redundancy data in audio packets. Note that audio publishing bitrate will be raised.
RED should be excluded for the cases when it cannot be applied:
| Code Block | ||
|---|---|---|
| ||
codecs_exclude_sip=red,mpeg4-generic,flv,mpv
codecs_exclude_sip_rtmp=red,opus,g729,g722,mpeg4-generic,vp8,mpv |
Getting an additional information about publisher configuration
Since WebSDK 2.0.246 build shipped with WCS build 5.2.2015 and later an additional information about publisher configuration will be sent to server. The data may help to debug and solve a stream publishing issues.
The data are sent in REST hooks.
System and browser information
System and browser information is sent in /connect REST hook
| Code Block | ||||
|---|---|---|---|---|
| ||||
{
"nodeId" : "VuQnlozpitGdVKzoIZg3f2JmJdMldzPV@192.168.0.40",
"appKey" : "defaultApp",
"sessionId" : "/192.168.0.231:11641/192.168.0.40:8443-b7efee23-45ac-4591-9aec-37f896ef10f1",
...,
"clientInfo" : {
"architecture" : "x86",
"bitness" : "64",
"brands" : [ {
"brand" : "Not/A)Brand",
"version" : "8"
}, {
"brand" : "Chromium",
"version" : "126"
}, {
"brand" : "Google Chrome",
"version" : "126"
} ],
"fullVersionList" : [ {
"brand" : "Not/A)Brand",
"version" : "8.0.0.0"
}, {
"brand" : "Chromium",
"version" : "126.0.6478.127"
}, {
"brand" : "Google Chrome",
"version" : "126.0.6478.127"
} ],
"mobile" : false,
"model" : "",
"platform" : "Windows",
"platformVersion" : "10.0.0"
}
} |
| Warning |
|---|
An architecture, OS version and full browser build number are available only in Chromium based browsers |
System and browser information is available at server side in response to /connection/find and /connection/find_all REST queries.
Publisher media devices information
Publisher media devices information is sent in /publishStream REST hook
| Code Block | ||||
|---|---|---|---|---|
| ||||
{
"nodeId" : "d2hxbqNPE04vGeZ51NPhDuId6k3hUrBB@192.168.0.39",
"appKey" : "defaultApp",
"sessionId" : "/192.168.0.83:42172/192.168.0.39:8443-325c8258-81a6-43de-8c74-1bf582fb436a",
"mediaSessionId" : "bb237f90-39be-11ef-81b8-bda3bf19742b",
"name" : "test",
"published" : true,
...,
"localMediaInfo" : {
"devices" : {
"video" : [ {
"id" : "bc18c5c2510d338d7b2c26bce4e37967feea3172f54ba2077558775d51839419",
"label" : "HD Webcam C615 (046d:082c)",
"type" : "camera"
}, {
"id" : "1f78289ccdbf27d67d605a35d6288acbdefe257275d4b5403525fb5cb1e1822e",
"label" : "HP HD Camera (0408:5347)",
"type" : "camera"
} ],
"audio" : [ {
"id" : "de988681c02901db0bfe012cd393eb2db5245fc2fb34709a26686ae6ca85b3ba",
"label" : "HD Webcam C615 Mono",
"type" : "mic"
}, {
"id" : "default",
"label" : "Default",
"type" : "mic"
}, {
"id" : "e7f4beddb0d71ea1f618cf3bab0f7e94053b622ddaf312c403824caa006f5889",
"label" : "Quantum 600 Mono",
"type" : "mic"
}, {
"id" : "fc6ac664dec546102d3f83b7fb5981afe3f0e88f8b76ffbe660ecfdd989bcf96",
"label" : "Family 17h (Models 10h-1fh) HD Audio Controller Analog Stereo",
"type" : "mic"
} ]
},
"tracks" : {
"video" : [ {
"trackId" : "1922f1d0-3a3f-4fa5-bd6e-e91ac84c666c",
"device" : "HD Webcam C615 (046d:082c)"
} ],
"audio" : [ {
"trackId" : "44187ea1-b756-4feb-80f0-ac57934c2200",
"device" : "MediaStreamAudioDestinationNode"
} ]
}
}
} |
Where:
- devices - a media devices list available to the browser
- tracks - what devices audio and video tracks of the stream published are capturing from
Publisher media devices information is available at server side in response to /stream/find and /stream/find_all REST queries.
Known issues
1. If the web app is inside an iframe element, publishing of the video stream may fail.
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