Video not being rendered

Video SDK Web
,
1

Description
This is observed couple of times during past 6 months. What happens is when both participants connect, let’s say them Alice & Bob. So now Alice is able to see self video & Bob video, but Bob is not able to see Alice video, although Bob is able to see self video.

Browser Console Error
{“type”:“INVALID_PARAMETERS”,“reason”:“user is not send video”,“errorCode”:6001}

Which Web Video SDK version?
2.1.10

Device (please complete the following information):

  • Device: Dell laptop, Macbook
  • OS: Windows 10, Windows 11, MacOS
  • Browser: Chrome, Edge

Additional context
Roughly saying this happens like once in a 100/200 calls, and one/two times earlier it happened frequently.

Zoom session ID - kA4/hSqvTWSXcGInIgocOg==

User 1 info:

{

    "userId": 16781312,

    "displayName": "Alice",

    "isHost": false,

    "audio": "",

    "bVideoOn": false,

    "userGuid": "4A\*\*\*F6-A\*\*E-B\*\*0-B\*\*4-\*\*\*\*\*\*\*2442A2",

    "isPhoneUser": false,

    "isInFailover": false,

    "isManager": false,

    "isAllowIndividualRecording": false,

    "isVideoConnect": true,

    "subsessionId": ""

}

User 2 info:
{

    "userId": 16778240,

    "displayName": "Bob",

    "isHost": false,

    "audio": "computer",

    "muted": false,

    "bVideoOn": true,

    "userGuid": "6F2\*\*\*18-6\*\*3-0\*\*2-A\*\*1-\*\*\*\*\*\*\*B834",

    "isPhoneUser": false,

    "isInFailover": false,

    "isManager": false,

    "isAllowIndividualRecording": false,

    "isVideoConnect": true,

    "subsessionId": ""

}

We have same data for other calls, there we don’t have this video call not rendering issue.

2

Hey @meet-jeavio

Thanks for your feedback.

kA4/hSqvTWSXcGInIgocOg==

After analyzing the logs, we found that UserID: 16781312 did not call stream.startVideo to start their self video. As a result, when UserID: 16778240 attempted to call stream.attachVideo(16781312), it returned the error “user is not sending video.”

You mentioned that UserID: 16781312 could see their self-view. How was the video captured? Was it using the localVideoTrack.start method? If so, this is not correct. Methods on localVideoTrack are only for self-preview and will not send video to remote users.

Below is the detailed sequence of user actions:

UserID: 16781312

2025-09-08 10:37:36 Join session

10:37:40:818 attachVideo(16778240)

10:37:40:823 detachVideo(16778240)

10:37:40:824 attachVideo(16778240)

10:39:23:048 detachVideo(16778240)

10:39:24:061 attachVideo(16778240)

10:39:25:997 detachVideo(16778240)

UserID: 16778240

2025-09-08 10:37:35 Join session

10:37:40.355 attachVideo(16781312) error :cross_mark:

10:37:40:127 StartVideo

10:37:40:302 attachVideo(16778240)

10:37:41.267 attachVideo(16781312) error :cross_mark:

Thanks
Vic