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You'll need to publish the track by

const tracks = await createLocalTracks({
  audio: true,
  video: true,
});
for (let i = 0; i < tracks.length; i++) {
	const track = tracks[i];
	await room.localParticipant.publishTrack(track);
}

cheers for the links, ok so we do have to manage our own localStream it looks like, livekit don’t seem to keep anything pre-publish

@straight-river-10244 what are you trying to do? are you trying to read the video data directly?

i need to kill the last stream once the user change device before publish

I don’t understand what you mean 😅 what’s the user flow you’re trying to handle? I can’t tell whether you’re describing a case where the user is already publishing or not

ok we have a preconnect device settings menu, which allow users to switch what mic/cam they wanna use, thats pre-publish, what i see so far is if we use the switchActiveDevice, the last mic/cam is kept opened, so i need to close those tracks