activeTab permissions issue in tabCapture

[Nitesh Gupta]

Basically this is my use case :

• According to particular tabId using the chrome.tabCapture.getMediaStreamId I want to get streamId out of it.
• Then send this streamId in the offscreen doc
• Now using the navigator.mediaDevices.getUserMedia I want to get the media streams

Following the above while using the chrome.tabCapture getting the below error :
Unchecked runtime.lastError: Extension has not been invoked for the current page (see activeTab permission). Chrome pages cannot be captured.

I have tried removing and attaching the activeTab permission but ending up with the same error.
However I have other permissions in-place like tabCapture, tabs.

[Oliver Dunk]

Hi Nitesh,

For calling tabCapture.capture, there are two important requirements:

• It needs to be called in response to a user gesture, for example `.addEventListener("click")` in a content script or `action.onClicked` in the background. There are some additional examples here.
• It needs to be done synchronously - you can't do so inside an async function, or in a callback.

Is it possible you are not meeting one of these? If you can share more about how you triggered the call, that might help to provide more specific suggestions.

We also have a sample which shows how to do this from start to finish which you might want to look at: https://github.com/GoogleChrome/chrome-extensions-samples/tree/main/functional-samples/sample.tabcapture-recorder

Oliver Dunk | DevRel, Chrome Extensions | https://developer.chrome.com/ | London, GB

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[Nitesh Gupta]

Actually I want to get the streamId from a particular tabId that I am passing into a function not from the chrome action. So is there any way to use chrome.tabCapture.getMediaStreamId that fulfils the above scenario.

Particular steps are as follows of my use case :

•  Inside the service worker according to particular tabId using the chrome.tabCapture.getMediaStreamId I want to get streamId out of it.

• Then send this streamId in the offscreen doc
• Now using the navigator.mediaDevices.getUserMedia I want to get the media streams

[Oliver Dunk]

Hi Nitesh,

It isn't possible to do this without a user gesture unfortunately. You can use the getDisplayMedia web API, but that requires the user to explicitly select a tab.

Oliver Dunk | DevRel, Chrome Extensions | https://developer.chrome.com/ | London, GB

[b t]

Has it finally been achieved

r：

[Oliver Dunk]

Hi,

There isn't anything new here - we continue to support passing streams to an offscreen document, but there is a user gesture requirement for getMediaStreamId().

I hope this helps.

Oliver Dunk | DevRel, Chrome Extensions | https://developer.chrome.com/ | London, GB

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