Javascript MediaSource:Uncaught InvalidStateError:无法执行';追加缓冲区';在';SourceBuffer';:此SourceBuffer已被删除
我正在尝试第一个演示MediaSource试用版,但我无法播放视频。我使用的是一个webm视频“big-buck-bunny_trailer.webm”。我不断收到“Uncaught InvalidStateError:未能在“MediaSource”上执行“endOfStream”:此MediaSource的一个或多个源缓冲区上的“Update”属性为true。“”。我也处理了sourcebuffer更新标志,但它似乎仍然不起作用Javascript MediaSource:Uncaught InvalidStateError:无法执行';追加缓冲区';在';SourceBuffer';:此SourceBuffer已被删除,javascript,html,media-source,mediastreamsource,mpeg-dash,Javascript,Html,Media Source,Mediastreamsource,Mpeg Dash,我正在尝试第一个演示MediaSource试用版,但我无法播放视频。我使用的是一个webm视频“big-buck-bunny_trailer.webm”。我不断收到“Uncaught InvalidStateError:未能在“MediaSource”上执行“endOfStream”:此MediaSource的一个或多个源缓冲区上的“Update”属性为true。“”。我也处理了sourcebuffer更新标志,但它似乎仍然不起作用 window.URL = window.URL || wind
window.URL = window.URL || window.webkitURL;
window.MediaSource = window.MediaSource || window.WebKitMediaSource;
if (!!!window.MediaSource) {
//handle fallback
alert('MediaSource API is not available');
}
var mediaSource = new MediaSource();
var sourceBuffer;
var audio;
var playRange = 0;
var queue = [];
var playing = false;
var contentLength = undefined;
function ajaxMediaGET(url, range, async, callback) {
var xhr = new XMLHttpRequest();
xhr.open("GET", url);
xhr.responseType = "arraybuffer";
xhr.setRequestHeader("Range", range);
xhr.addEventListener('load', onLoad, false);
xhr.send();
function onLoad() {
playRange += Number(xhr.getResponseHeader("Content-Length"));
if(!contentLength) {
var contentLengthString = xhr.getResponseHeader("Content-Range").split("/");
contentLength = Number(contentLengthString[1]);
}
//callback(new Uint8Array(xhr.response));
sourceBuffer.addEventListener("update", function() {
if(!sourceBuffer.updating && queue.length > 0) {// && mediaSource.readyState == "open"
sourceBuffer.appendBuffer(queue.shift());
sourceBuffer.removeEventListener("update");
}
}, false);
if (!sourceBuffer.updating) {
sourceBuffer.appendBuffer(new Uint8Array(xhr.response));
} else {
queue.push(new Uint8Array(xhr.response));
}
if(playRange < contentLength - 1) {
ajaxMediaGET("path-to-server", loadNextRange(playRange), true, undefined);
} else {
mediaSource.endOfStream();
}
}
}
function mediaSourceOpen(e) {
sourceBuffer = e.target.addSourceBuffer('video/webm;codecs="vp8,vorbis"');
ajaxMediaGET("path-to-server", loadNextRange(playRange), true, undefined);
/*if(!playing) {
audio.play();
playing = true;
}*/
}
function initPlayer() {
audio = document.querySelector('video');
audio.src = window.URL.createObjectURL(mediaSource);
mediaSource.addEventListener('sourceopen', mediaSourceOpen, false);
mediaSource.addEventListener('webkitsourceopen', mediaSourceOpen, false);
}
initPlayer();
window.URL=window.URL | | window.webkitURL;
window.MediaSource=window.MediaSource | | window.WebKitMediaSource;
如果(!!!window.MediaSource){
//处理回退
警报(“MediaSource API不可用”);
}
var mediaSource=新的mediaSource();
var源缓冲区;
var音频;
var playRange=0;
变量队列=[];
var=false;
var contentLength=未定义;
函数ajaxMediaGET(url、范围、异步、回调){
var xhr=new XMLHttpRequest();
xhr.open(“GET”,url);
xhr.responseType=“arraybuffer”;
setRequestHeader(“范围”,范围);
xhr.addEventListener('load',onLoad,false);
xhr.send();
函数onLoad(){
playRange+=数字(xhr.getResponseHeader(“内容长度”);
如果(!contentLength){
var contentLengthString=xhr.getResponseHeader(“内容范围”).split(“/”);
contentLength=Number(contentLengthString[1]);
}
//回调(新的Uint8Array(xhr.response));
addEventListener(“更新”,函数(){
如果(!sourceBuffer.updateing&&queue.length>0){/&&mediaSource.readyState==“打开”
appendBuffer(queue.shift());
sourceBuffer.removeEventListener(“更新”);
}
},假);
如果(!sourceBuffer.update){
appendBuffer(新的Uint8Array(xhr.response));
}否则{
push(新的Uint8Array(xhr.response));
}
如果(播放范围<内容长度-1){
ajaxMediaGET(“服务器路径”,loadNextRange(playRange),true,未定义);
}否则{
mediaSource.endOfStream();
}
}
}
函数mediaSourceOpen(e){
sourceBuffer=e.target.addSourceBuffer('video/webm;codecs=“vp8,vorbis”);
ajaxMediaGET(“服务器路径”,loadNextRange(playRange),true,未定义);
/*如果(!玩){
音频播放();
玩=真;
}*/
}
函数initPlayer(){
音频=document.querySelector(“视频”);
audio.src=window.URL.createObjectURL(mediaSource);
addEventListener('sourceopen',mediaSourceOpen,false);
addEventListener('webkitsourceopen',mediaSourceOpen,false);
}
initPlayer();
您需要等待sourceBuffer完成更新。替换mediaSource.endOfStream();与
if(播放范围
请看一下文档和示例代码
chrome://media-internals/ 获取错误,意外的元素ID 0x45df 00:00:05 667错误媒体::源状态::追加:流解析失败。数据大小=61441 append_window_start=0 append_window_end=1.#INF.任何我不知道的想法.webm,但是如果您想在
mp4
容器中使用MSE和h264
,则必须给出视频的sourceBuffer
特定部分(即带有moov
框的初始化段和带有moof+mdat
框的视频段)。当然,您需要遵循.webm内容的特殊格式才能正确使用MSE。
if(playRange < contentLength - 1) {
ajaxMediaGET("path-to-server", loadNextRange(playRange), true, undefined);
} else {
sourceBuffer.addEventListener('updateend', function(){
mediaSource.endOfStream();
});
}