# Delayed Caption in Zoom when using Closed Captioning API

**URL:** <https://devforum.zoom.us/t/delayed-caption-in-zoom-when-using-closed-captioning-api/30373>\
**Category:** API and Webhooks\
**Created:** [September 16, 2020, 3:22am UTC](https://devforum.zoom.us/t/delayed-caption-in-zoom-when-using-closed-captioning-api/30373 "2020-09-16T03:22:16Z")\
**Posts on this page:** 1\
**Showing post:** 5

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**Author:** ![skinner.cheng](https://sea2.discourse-cdn.com/flex016/user_avatar/devforum.zoom.us/skinner.cheng/32/15398_2.png) [@skinner.cheng](https://devforum.zoom.us/u/skinner.cheng)\
**Post date:** [September 16, 2020, 8:36pm UTC](https://devforum.zoom.us/t/delayed-caption-in-zoom-when-using-closed-captioning-api/30373/5 "2020-09-16T20:36:35Z")

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I just submitted the request in Zoom Support.

I also found there’re some posts before:

> [@Closed caption endpoint (/closedcaption) lags sometimes](https://devforum.zoom.us/t/closed-caption-endpoint-closedcaption-lags-sometimes/22085):
>
> I’m using the [/closedcaption](https://support.zoom.us/hc/en-us/articles/115002212983-Integrating-a-third-party-closed-captioning-service) endpoint for a 3rd closed captioning integration. I sometimes experience big lag in between subtitles - After I call the endpoint, It could take a few minutes before the corresponding subtitle response is returned to my zoom screen. When it dose return, all subtitle responses of calls in this period are returned all together to my zoom screen. I did remember to increase the ‘seq’ val by 1 each time I called the endpoint with new text.

> [@Unpredictable delay before first CC message is displayed](https://devforum.zoom.us/t/unpredictable-delay-before-first-cc-message-is-displayed/21663):
>
> I read the page: [https://support.zoom.us/hc/en-us/articles/115002212983-Integrating-a-third-party-closed-captioning-service](https://support.zoom.us/hc/en-us/articles/115002212983-Integrating-a-third-party-closed-captioning-service) Description Zoom replies to my initial Closed Caption POST with a timestamp and no error code, but the message is not displayed in the user interface, nor does it give the “Closed captioning available message” . Only after an unpredictable delay of between 15 seconds and several minutes does the user interface respond to subsequent CC messages. After that messages ar…

Hopefully there’s any update, though.

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