Javascript TypeError:无法执行';addTrack';在';MediaStream';:参数1的类型不是';MediaStreamTrack';
我正在尝试从流中添加和删除音频曲目。 removeTrack函数起作用,但addTrack函数在调用时抛出下面的错误Javascript TypeError:无法执行';addTrack';在';MediaStream';:参数1的类型不是';MediaStreamTrack';,javascript,webrtc,mediastream,Javascript,Webrtc,Mediastream,我正在尝试从流中添加和删除音频曲目。 removeTrack函数起作用,但addTrack函数在调用时抛出下面的错误 Uncaught TypeError: Failed to execute 'addTrack' on 'MediaStream': parameter 1 is not of type 'MediaStreamTrack'. at addAudio (video.jsx:22) at HTMLButtonElement.document.querySelecto
Uncaught TypeError: Failed to execute 'addTrack' on 'MediaStream': parameter 1 is not of type 'MediaStreamTrack'.
at addAudio (video.jsx:22)
at HTMLButtonElement.document.querySelector.onclick (video.jsx:32)
下面是我的代码
componentDidMount = () => {
var Mstream;
const video = document.querySelector("video")
const hasMedia = () => {
return navigator.getUserMedia = navigator.getUserMedia || navigator.mozGetUserMedia || navigator.webkitGetUserMedia
}
const fetchMedia = () => {
var constraints = { video: true, audio: true }
navigator.getUserMedia(constraints, (stream) => {
Mstream = stream
video.srcObject = stream
}, (error) => { })
}
const addAudio = () => {
console.log("Adding")
const audioTracks = Mstream.getAudioTracks()
Mstream.addTrack(audioTracks[0])
console.log('Added')
}
const removeAudio = () => {
console.log('removing')
const audioTracks = Mstream.getAudioTracks()
Mstream.removeTrack(audioTracks[0])
console.log('Removed')
}
document.querySelector("button#add").onclick = () => addAudio()
document.querySelector("button#remove").onclick = () => removeAudio()
hasMedia() && fetchMedia()
}
编辑
但它仍然返回与addTrack函数相同的错误
const addAudio = () => {
console.log("Adding")
const audioTracks = Mstream.getAudioTracks()
if(audioTracks.length <= 0){
Mstream.addTrack(audioTracks[0])
console.log("Track Added")
}
else{
console.log("Cannot Add Track")
}
}
const removeAudio = () => {
console.log('removing')
const audioTracks = Mstream.getAudioTracks()
if (audioTracks.length > 0) {
Mstream.removeTrack(audioTracks[0])
}
else {
console.log("Cannot Remove It")
}
}
const addAudio=()=>{
console.log(“添加”)
const audioTracks=Mstream.getAudioTracks()
if(audioTracks.length{
console.log('正在删除')
const audioTracks=Mstream.getAudioTracks()
如果(audioTracks.length>0){
Mstream.removeTrack(音频曲目[0])
}
否则{
console.log(“无法删除它”)
}
}
方法MediaStream.getAudioTracks()
返回一个包含MediaStreamTrack
对象的数组。但是,它不能保证数组中有任何元素。audioTracks[0]
可能是未定义的
,这将导致发生此错误。@hackingtechhome在尝试调用addtrack之前,只需检查返回的数组是否有长度
。我已编辑了问题并添加了我使用的新代码,但仍然返回相同的错误。请查看above@hackingtechhome你搞错了:我如果长度小于或等于零,则不能使用addTrack.Replace。