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# helpdesks
steep-balloon-41261
09/27/2023, 8:35 AMThis message was deleted.
e
enough-zebra-80131
09/27/2023, 8:36 AMcreating and publishing a track like this doesn't work when using vp9, but works when using h264:
Copy code
let video_track = new LocalVideoTrack(mediaStreamTrack, undefined, true);
video_track.source = Track.Source.ScreenShare;
this.room.localParticipant.publishTrack(video_track, {
name: this.screenshareStreamUUID,
videoCodec: "vp9",
});enough-zebra-80131
09/27/2023, 9:36 AMit shows as vp8 on
<chrome://webrtc-internals/>d
dry-elephant-14928
09/27/2023, 11:12 PMoh that's strange.. which version of the client SDK are you using? it's possible (likely) it's a bug
dry-elephant-14928
09/28/2023, 4:18 AM@enough-zebra-80131 confirmed this is a bug. we'll have a look on our side
👍 1
e
enough-zebra-80131
09/28/2023, 8:21 AMI used the latest version of livekit-client (1.13.4)
enough-zebra-80131
09/28/2023, 8:21 AMthank you for having a look!
d
dry-elephant-14928
09/28/2023, 5:20 PMWe found the issue, for some reasons Chrome is rejecting VP9 with S3T3 scalability, have a PR out to force it to use S1T3
🙌 1
dry-elephant-14928
09/28/2023, 5:21 PMe
enough-zebra-80131
09/28/2023, 5:21 PMthat's awesome! this should unblock me!