Zoom meeting WebSDK video slows down and freezes

Our concern is that when some of the cameras are on, the videos will sometimes freeze and delayed for a 1-5 seconds. Specialy on MacOS Chrome browser


Windows (Chrome) = Sometimes video slows down
MacOS (Chrome) = Sometimes video freezes and slows down
MacOS (Safari) = currently not used as there where still some issues with it with the lower versions

Can anyone help us with this?

#of attendees on testing
even 2 videos/camera (1 host 1 attendee) = will still slow down and freezes

Which Web Meeting SDK version?

Meeting SDK Code Snippets

<script src="https://source.zoom.us/1.9.9/lib/vendor/react.min.js"></script>
<script src="https://source.zoom.us/1.9.9/lib/vendor/react-dom.min.js"></script>
<script src="https://source.zoom.us/1.9.9/lib/vendor/redux.min.js"></script>
<script src="https://source.zoom.us/1.9.9/lib/vendor/redux-thunk.min.js"></script>
<script src="https://source.zoom.us/1.9.9/lib/vendor/lodash.min.js"></script>
<script src="https://source.zoom.us/zoom-meeting-1.9.9.min.js"></script>
var ZoomPhp = {
    signature: '',
var meetingConfig = {
    apiKey: '',
    userEmail: '',
    passWord: '',
    webEndpoint: '',
    lang: '',
    meetingNumber: '',
    userName: '',
function beginJoin(signature) {
        leaveUrl: ZoomPhp.prevUrl,
        webEndpoint: meetingConfig.webEndpoint,
        success: function () {
                meetingNumber: meetingConfig.meetingNumber,
                userName: meetingConfig.userName,
                signature: signature,
                apiKey: meetingConfig.apiKey,
                userEmail: meetingConfig.userEmail,
                passWord: meetingConfig.passWord,
                success: function (res_join) {
                error: function (res) {
                    // console.log(['DEBUG', res]);
        error: function (res) {
            // console.log(['DEBUG', res]);

Device (please complete the following information):

Device name DESKTOP-J84RJL2
Processor Intel(R) Core™ i5-4460 CPU @ 3.20GHz 3.20 GHz
Installed RAM 8.00 GB (7.88 GB usable)
Device ID 78052811-7F89-4AF9-9893-0796A5DAF248
Product ID 00330-80000-00000-AA899
System type 64-bit operating system, x64-based processor
Pen and touch No pen or touch input is available for this display

Model Name: MacBook Air
Model Identifier: MacBookAir7,1
Processor Name: Intel Core i5
Processor Speed: 1.6 GHz
Number of Processors: 1
Total Number of Cores: 2
L2 Cache (per Core): 256 KB
L3 Cache: 3 MB
Memory: 4 GB
Boot ROM Version:

Note: where not really concern about what device we are using cause we also tested on higher ends devices with much more processing capability but still the video freezes and slows down.

Hey @dannyJack,

Thank you for reaching out to the Zoom Developer Forum. I’ve followed up with you in our other post:

I’ll close this post and follow up with you there.