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ajde.ts
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ajde.ts
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import * as EBML from './';
import {Decoder, Encoder, tools} from './';
import EBMLReader from './EBMLReader';
window.OurRecorder = async function (stream: string) {
const decoder = new Decoder();
const reader = new EBMLReader();
reader.logging = true;
let tasks = Promise.resolve(void 0);
let jumpStop = Promise.resolve(void 0);
let webM = new Blob([], {type: "video/webm"});
//const stream = await navigator.mediaDevices.getUserMedia({video: true, audio: true});
window.rec = new MediaRecorder(stream, { mimeType: 'video/webm; codecs="vp8, opus"'});
const ondataavailable = (ev: BlobEvent)=>{
const chunk = ev.data;
webM = new Blob([webM, chunk], {type: chunk.type});
console.log(chunk.size, webM.size);
const task = async ()=>{
const buf = await readAsArrayBuffer(chunk);
const elms = decoder.decode(buf);
elms.forEach((elm)=>{ reader.read(elm); });
};
tasks = tasks.then(()=> task() );
};
rec.addEventListener("dataavailable", ondataavailable);
// if set timeslice, bug occur on firefox: https://bugzilla.mozilla.org/show_bug.cgi?id=1272371
// rec.start(100);
rec.start();
//await sleep(10 * 1000);
let count = 0;
while(webM.size === 0){
/* if(count > 10){
alert("MediaRecorder did not record anything");
throw new Error("MediaRecorder did not record anything");
}*/
await sleep(1*1000); // wait dataavailable event
count++;
}
rec.removeEventListener("dataavailable", ondataavailable);
rec.stream.getTracks().map((track) => { track.stop(); });
await tasks; // wait data processing
reader.stop();
/*const raw_video = document.createElement("video");
raw_video.src = URL.createObjectURL(webM);
raw_video.controls = true;
put(raw_video, "media-recorder original(not seekable)");*/
// const infos = [
/* {duration: reader.duration, title: "add duration only (seekable but slow)"},
{cues: reader.cues, title: "add cues only (seekable file)"},*/
// {duration: reader.duration, cues: reader.cues, title: "add duration and cues (valid seekable file)"},
// ];
// for(const info of infos){
const info = {duration: reader.duration, cues: reader.cues, title: "add duration and cues (valid seekable file)"};
const refinedMetadataBuf = tools.putRefinedMetaData(reader.metadatas, info);
const webMBuf = await readAsArrayBuffer(webM);
const body = webMBuf.slice(reader.metadataSize);
const refinedWebM = new Blob([refinedMetadataBuf, body], {type: webM.type});
// logging
//console.group(info.title);
const refinedBuf = await readAsArrayBuffer(refinedWebM);
const _reader = new EBMLReader();
_reader.logging = true;
new Decoder().decode(refinedBuf).forEach((elm)=> _reader.read(elm) );
_reader.stop();
//console.groupEnd();
var b = URL.createObjectURL(refinedWebM);
var a = document.createElement("a");
document.body.appendChild(a);
a.style = "display: none";
a.href = b;
a.download = "screenVideo.webm";
a.click();
}
function put(elm: HTMLElement, title: string): void {
const h1 = document.createElement("h1");
h1.appendChild(document.createTextNode(title));
document.body.appendChild(h1);
document.body.appendChild(elm);
}
function readAsArrayBuffer(blob: Blob): Promise<ArrayBuffer> {
return new Promise((resolve, reject)=>{
const reader = new FileReader();
reader.readAsArrayBuffer(blob);
reader.onloadend = ()=>{ resolve(reader.result); };
reader.onerror = (ev)=>{ reject(ev.error); };
});
}
function sleep(ms: number): Promise<any>{
return new Promise((resolve)=> setTimeout(resolve, ms) );
}
// MediaRecorder API
interface BlobEvent extends Event {
data: Blob;
}
declare class MediaRecorder extends EventTarget {
constructor(stream: MediaStream, opt: any);
start(timeslice?: number): void;
stop(): void;
mimeType: string;
state: "inactive"|"recording"|"paused";
stream: MediaStream;
videoBitsPerSecond: number;
audioBitsPerSecond: number;
ondataavailable?: (ev: BlobEvent)=> void;
onerror?: (ev: ErrorEvent)=> void;
addEventListener(event: "dataavailable", callback: (ev: BlobEvent)=> any);
requestData(): Blob;
}
//main();