The stream is not restored when the shared window page is minimized and then zoomed in on the NW.js

[zesun96]

Describe the bug

expect: the stream track unmute and re-publish;

Reproduction

A share a window page;
B view it good;
then the window of A is minimized;
B look black picture;
then the window of A is zoomed in;

Logs

I add some logs at client-sdk-js:

  private handleTrackMuteEvent = () =>
    this.debouncedTrackMuteHandler().catch(() =>
      this.log.debug('track mute bounce got cancelled by an unmute event', this.logContext),
    );

  private debouncedTrackMuteHandler = debounce(async () => {
    this.log.debug('track mute event', this.logContext),
    await this.pauseUpstream();
  }, 5000);

  private handleTrackUnmuteEvent = async () => {
    this.log.debug('track unmute event', this.logContext),
    this.debouncedTrackMuteHandler.cancel('unmute');
    await this.resumeUpstream();
  };


but only recived "track mute event" on window  is minimized;

System Info

OS: Windows 10
NWjs version: 0.82.0
livekit client-sdk-js version: v1.15.13

Severity

annoyance

Additional Information

No response

[zesun96]

I found that the following code was affected track unmute event:
room/track/LovalTrack.ts

async pauseUpstream() {
    const unlock = await this.pauseUpstreamLock.lock();
    try {
      ...
      **await this.sender.replaceTrack(null);**
    } finally {
      unlock();
    }
  }

When I skip this code and run it again, it's fine.

[lukasIO]

Can you confirm that you don't receive a unmute event when maximising the window again?

Which browser are you on? Does the same behaviour reproduce with other browsers?

[zesun96]

I didn't receive unmute event.
It is ok on google browser.

[zesun96]

this is google logs when share window is minimized.
google version: 126.0.6478.127

[zesun96]

When I commented out the following code in nwjs:
await this.sender.replaceTrack(null);
I can receive unmute event.

[lukasIO]

are you able to reproduce this in the sample app using pnpm sample in this repo?

[zesun96]

no, adaptation is required to used sample in nwjs env.

[lukasIO]

I see. I'm not very familiar with NW.js, but then probably this should be reported to NW.js as a bug as it seems to be not emitting the unmute event on the track when a window is restored.

[zesun96]

I only use nwjs run webrtc sample, the unmute event is emitted.

[aimin-git]

I see. I'm not very familiar with NW.js, but then probably this should be reported to NW.js as a bug as it seems to be not emitting the unmute event on the track when a window is restored.
@lukasIO I thought the unmute event is emitted by webrtc, isn't it?

[lukasIO]

I'm guessing NW.js needs to wrap get display media APIs, similar to how electron has to. That could potentially explain why it works as expected in Chrome, but doesn't in NW.js.