# Delay in Video/Audio while using Zoom Video SDK in an Angular SPA

**URL:** <https://devforum.zoom.us/t/delay-in-video-audio-while-using-zoom-video-sdk-in-an-angular-spa/99064>\
**Category:** Web\
**Tags:** video-sdk\
**Created:** [November 27, 2023, 12:37pm UTC](https://devforum.zoom.us/t/delay-in-video-audio-while-using-zoom-video-sdk-in-an-angular-spa/99064 "2023-11-27T12:37:00Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![ink](https://avatars.discourse-cdn.com/v4/letter/i/898d66/32.png) [@ink](https://devforum.zoom.us/u/ink)\
**Post date:** [November 27, 2023, 12:37pm UTC](https://devforum.zoom.us/t/delay-in-video-audio-while-using-zoom-video-sdk-in-an-angular-spa/99064/1 "2023-11-27T12:37:00Z")

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**Description**  
We use Zoom Video SDK in an Angular SPA (Angular v10.x)  
Recently we received multiple reports from our users that they started to experience delays in Video and Audio after a while (normally after 25 mins).

We tried to reproduce the issue but in our tests, it works fine.

We noticed for almost all problematic video calls there was a huge delay in the “Device from Web Client” and “Device to Web Client” parameters in the Zoom reports.

**What is the difference between these 4 items?**

- Device from Web Client
- Web Client from MMR
- Device to Web Client
- Web Client to MMR

**Can “Host Data Center” affect the video call quality/latency?**  
For some of the video calls the “Host Data Center” is “US” while we know both participants live in Europe and they don’t use a VPN connection.

In the Zoom dashboard, the client IP address of the participant who had such a huge delay belongs to Zoom itself.  
for example:  
[159.124.21.117](https://who.is/whois-ip/ip-address/159.124.21.117)

**Notes**

- Video calls always have only two participants
- We enable/start Zoom Live transcription for one of the participants

**Which Web Video SDK version?**  
1.9.0

**Troubleshooting Routes**

- We already implemented the Angular specific suggestions mentioned [here](https://developers.zoom.us/docs/video-sdk/web/sessions/#using-angular).

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**Author:** ![rehema.zoom](https://sea2.discourse-cdn.com/flex016/user_avatar/devforum.zoom.us/rehema.zoom/32/40323_2.png) [@rehema.zoom](https://devforum.zoom.us/u/rehema.zoom)\
**Post date:** [December 14, 2023, 4:40pm UTC](https://devforum.zoom.us/t/delay-in-video-audio-while-using-zoom-video-sdk-in-an-angular-spa/99064/2 "2023-12-14T16:40:50Z")

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Hi @ink ,

Thank you for your question! Our engineers have spent some time investigating this issue, and have decided to open a support ticket on your behalf. Look forward to a follow-up soon.

Thank you,  
Rehema

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**Author:** ![system](https://us1.discourse-cdn.com/flex016/uploads/zoomdeveloper/original/3X/6/1/614bdd549b610bbaa46ff934617683a02bdaa03c.png) [@system](https://devforum.zoom.us/u/system)\
**Post date:** [January 14, 2024, 2:40am UTC](https://devforum.zoom.us/t/delay-in-video-audio-while-using-zoom-video-sdk-in-an-angular-spa/99064/3 "2024-01-14T02:40:57Z")

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Closed on January 14, 2024, 2:40am UTC

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