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# helpdesks
steep-balloon-41261
05/20/2023, 1:52 PMThis message was deleted.
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dry-farmer-50272
05/20/2023, 1:56 PMHi,
if you just want to get local preview you dont need to use sdk just simply use js web apis
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strong-kite-90563
05/20/2023, 1:58 PMHi thanks for the quick reply.
What if I want to switch camera/audio device before connecting? can I do this with the component-react?
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dry-farmer-50272
05/20/2023, 2:05 PMI didnt use react component till now but in js sdk you can do that so you should be able to do that in react component too and if you couldnt do that , again you can do that with js native functions too :)
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strong-kite-90563
05/20/2023, 2:23 PMAh I see, thank you, I will play around with the libs 🙂
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magnificent-art-43333
05/20/2023, 3:26 PMHere’s an example invocation of the Prejoin component:
https://github.com/livekit-examples/meet/blob/main/pages/rooms/%5Bname%5D.tsx
And here’s the component itself:
https://github.com/livekit/components-js/blob/main/packages/react/src/prefabs/PreJoin.tsx
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strong-kite-90563
05/20/2023, 3:43 PMThanks @magnificent-art-43333, any chance
usePreviewDevicem
magnificent-art-43333
05/20/2023, 3:44 PMwdyt @polite-kilobyte-67570 @eager-zoo-16408 ?
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eager-zoo-16408
05/20/2023, 4:12 PMHi @strong-kite-90563, it looks like this was an oversight on our part. The function is marked
@publics
strong-kite-90563
05/20/2023, 4:21 PMthank you
strong-kite-90563
05/21/2023, 9:43 AMHi @eager-zoo-16408, any chance
useStartAudiop
polite-kilobyte-67570
05/22/2023, 7:44 AMjust to understand your usecase better (and potentially improve how the components work today), why wouldn’t you want to use the
StartAudios
strong-kite-90563
05/22/2023, 7:47 AMHi @polite-kilobyte-67570, I want to make the startAudio hidden in the mute button, so initially after connecting, the audio icon will be muted, and the user unmutes (which sets volume to 100 and handles any startAudio related stuff)
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polite-kilobyte-67570
05/22/2023, 7:57 AMah, but that way the user might not be able to hear everyone else until they unmute themselves, would this be intended?
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strong-kite-90563
05/22/2023, 7:58 AMyes 🙂
👌 1
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polite-kilobyte-67570
05/24/2023, 2:20 PMhttps://github.com/livekit/components-js/releases/tag/%40livekit%2Fcomponents-react%401.0.3 exposes
useAudioPlaybackusePreviewDevices
strong-kite-90563
05/27/2023, 11:00 AMthank you