Javascript appendBuffer()未追加到sourceBuffer中
我正在从API获取视频Javascript appendBuffer()未追加到sourceBuffer中,javascript,stream,fetch,buffer,media-source,Javascript,Stream,Fetch,Buffer,Media Source,我正在从API获取视频 response.body是一个可读流。所以我把它读进了阅读器 然后将所有区块(value)推入区块数组(chunks.push(value)) 然后将块数组转换为arrayBuffer(let buffer=wait blob.arrayBuffer()),因为blob不能附加到sourceBuffer 以上所有步骤都正常工作!我唯一的问题是将缓冲区追加到sourceBuffer(sourceBuffer.appendBuffer(buffer))中 控制台不会弹出任何
response.body
是一个可读流。所以我把它读进了阅读器
然后将所有区块(value
)推入区块数组(chunks.push(value)
)
然后将块数组转换为arrayBuffer(let buffer=wait blob.arrayBuffer()
),因为blob不能附加到sourceBuffer
以上所有步骤都正常工作!我唯一的问题是将缓冲区追加到sourceBuffer(sourceBuffer.appendBuffer(buffer)
)中
控制台不会弹出任何错误,但sourceBuffer不会更新。它是空的
有人有什么想法吗,发生了什么事
非常感谢
<body>
<video id="test-video-api">
</video>
<script>
const fetchUrl = "https://myserver/api/video?fuid=12345";
const videoTag = document.getElementById("test-video-api");
function getVideo(){
if (window.MediaSource) {
var mediaSource = new MediaSource();
videoTag.src = URL.createObjectURL(mediaSource);
mediaSource.addEventListener('sourceopen', sourceOpen);
} else {
console.log("The Media Source Extensions API is not supported.")
}
async function sourceOpen(e) {
URL.revokeObjectURL(videoTag.src);
const mimeCodec = 'video/mp4; codecs="avc1.4d400d,mp4a.40.2"; profiles="isom,iso2,avc1,mp41"';
var mediaSource = e.target;
var sourceBuffer = mediaSource.addSourceBuffer(mimeCodec);
let chunks = [];
let response = await fetch(fetchUrl, {method: "GET", credentials: "include"});
const reader = response.body.getReader();
while (true){
const {done, value} = await reader.read();
chunks.push(value);
if(done){
let blob = new Blob(chunks);
let buffer = await blob.arrayBuffer();
sourceBuffer.appendBuffer(buffer);
break
}
}
}
}
getVideo()
</script>
</body>
常量fetchUrl=”https://myserver/api/video?fuid=12345";
const videoTag=document.getElementById(“测试视频api”);
函数getVideo(){
if(window.MediaSource){
var mediaSource=新的mediaSource();
videoTag.src=URL.createObjectURL(mediaSource);
mediaSource.addEventListener('sourceopen',sourceopen);
}否则{
log(“不支持媒体源扩展API”)
}
异步函数sourceOpen(e){
revokeObjectURL(videoTag.src);
const mimeCodec='video/mp4;codecs=“avc1.4d400d,mp4a.40.2”;profiles=“isom,iso2,avc1,mp41”;
var mediaSource=e.target;
var sourceBuffer=mediaSource.addSourceBuffer(mimeCodec);
让chunks=[];
let response=wait fetch(fetchUrl,{method:“GET”,凭证:“include”});
const reader=response.body.getReader();
while(true){
const{done,value}=wait reader.read();
推送(值);
如果(完成){
设blob=新blob(块);
让buffer=wait blob.arrayBuffer();
sourceBuffer.appendBuffer(buffer);
打破
}
}
}
}
getVideo()
我会运行页面并检查chrome://media-internals/
查看任何可疑日志/错误