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# sdk-rust

steep-balloon-41261

08/07/2023, 1:12 PM

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enough-zebra-80131

08/07/2023, 1:12 PM

publishing like this:

Copy code

let video_track = new LocalVideoTrack(mediaStreamTrack, undefined, true);
video_track.source = Track.Source.ScreenShare;
this.screenshareVideoTrack = video_track;
this.room.localParticipant.publishTrack(video_track, {
    name: this.screenshareStreamUUID,
    videoCodec: "vp9"
});

enough-zebra-80131

08/07/2023, 1:14 PM

the video stream isn't received by other participants

enough-zebra-80131

08/07/2023, 1:20 PM

using

livekit-client

1.12.3

enough-zebra-80131

08/07/2023, 1:21 PM

(webcam streams work fine)

enough-zebra-80131

08/07/2023, 1:22 PM

webcam stream published like this:

Copy code

await this.room.localParticipant.setCameraEnabled(true, undefined, {
    name: this.webcamStreamUUID,
});

enough-zebra-80131

08/07/2023, 1:24 PM

it also works if I use

vp8

h264

enough-zebra-80131

08/07/2023, 1:28 PM

also doesn't work if I publish like this:

Copy code

this.room.localParticipant.setScreenShareEnabled(true, undefined, {
    name: this.screenshareStreamUUID,
    videoCodec: "vp9"
});

enough-zebra-80131

08/07/2023, 2:09 PM

the

setCameraEnabled

call doesn't specify a codec because it's specified in the room settings:

Copy code

this.room = new Room({
    adaptiveStream: false,
    dynacast: true,
    videoCaptureDefaults: {
        resolution: VideoPresets.h1080.resolution,
    },
    publishDefaults: {
        videoCodec: "vp9",
        videoEncoding: {
            maxBitrate: 10_000_000,
            maxFramerate: 30,
        },
        backupCodec: {
            codec: "vp9",
            encoding: {
                maxBitrate: 10_000_000,
                maxFramerate: 30,
            },
        },
    },
});

boundless-energy-78552

08/08/2023, 6:51 PM

VP9 is not supported by the Rust SDK PR are accepted! Some tips: 1. Make sure

rtc_libvpx_build_vp9=true

is enabled inside the libwebrtc build scripts 2. We use custom encoders/decoders implementation, so you will need to add the default VP9 impl inside it With 1 & 2, simulcast VP9 should directly work. If you want SVC support, you can take a look at how the client-sdk-js is doing it (requires to edit the Rust LiveKit implementation)

enough-zebra-80131

08/08/2023, 6:56 PM

sorry, it was my mistake to post it on the #C04G4GE0RGX channel, the issue is browser to browser, no rust in the loop

👍 1

enough-zebra-80131

08/08/2023, 6:57 PM

but thank you for the notes on the vp9 support on the rust side!

enough-zebra-80131

08/08/2023, 6:58 PM

I'll work on it once the browser-to-browser thing works

🙌 1

boundless-energy-78552

08/08/2023, 8:38 PM

Cc @dry-elephant-14928 (browser issue) VP9 should work

👍 1

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