Twilio Video - 切换媒体设备选项不起作用

Question

我使用twilio与twilio-videovbeta-2上的主分支计数这个回购https://github.com/twilio/video-quickstart-js
我显示选择介质和设备推入，但是当我试图updateVideoDevice我一个错误

updateVideoDevice error TypeError: track must be a LocalAudioTrack, LocalVideoTrack, LocalDataTrack, or MediaStreamTrack
at Object.INVALID_TYPE (index.js:30952)
at Object.validateLocalTrack (index.js:31469)
at LocalParticipant.unpublishTrack (index.js:17047)
at index.js:17096
at Array.reduce (<anonymous>)
at LocalParticipant.unpublishTracks (index.js:17095)
at index.js:36056

我的updateVideoDevice功能如下

function updateVideoDevice(event) {
const select = event.target;
const localParticipant = room.localParticipant;
if (select.value !== '') {
    Video.createLocalVideoTrack({
        deviceId: { exact: select.value }
    }).then(function(localVideoTrack) {
        const tracks = Array.from(localParticipant.videoTracks.values());
        localParticipant.unpublishTracks(tracks);
        log(localParticipant.identity + " removed track: " + tracks[0].kind);
        detachTracks(tracks);

        localParticipant.publishTrack(localVideoTrack);
        log(localParticipant.identity + " added track: " + localVideoTrack.kind);
        const previewContainer = document.getElementById('local-media');
        attachTracks([localVideoTrack], previewContainer);
    })
    .catch(error => {
        console.error('updateVideoDevice error' ,error);
    });
}
}

任何人都可以解释我做错了什么吗？

Answer 1

Twilio 开发人员布道者在这里。

这看起来是 Twilio Video JS v1 和 v2 之间的重大变化。在 v2 文档中，调用localParticipant.videoTracks返回 a Mapof <Track.SID, LocalVideoTrackPublication>。调用.values()该映射返回LocalVideoTrackPublications的迭代器，然后使用 将其转换为数组Array.from。

问题是，然后您将LocalVideoTrackPublications数组传递给localParticipant.unpublishTracks(tracks);导致错误unpublishTracks的数组，因为需要LocalTracks数组而不是LocalVideoTrackPublications。

您可以通过映射发布并返回track属性来解决此问题：

const tracks = Array.from(localParticipant.videoTracks.values())
                 .map(publication => publication.track);

如果这有帮助，请告诉我。