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Author: javascript-2020

blog/25-11-15/ffmpeg-in-the-browser/ex/ffmpeg-wasm/demo-tldr.js

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+
+
+
+(async()=>{
+console.clear();
+  
+        var {zip}     = await import('https://cdn.jsdelivr.net/gh/javascript-2020/libs/js/io/tiny-unzip/tiny-unzip.m.js');
+        var get       = url=>fetch(url).then(res=>res.blob());
+        var blob      = await get('https://raw.githubusercontent.com/javascript-2020/external/main/ffmpeg/ffmpeg-wasm/ffmpeg-wasm.zip');
+        var fnstr     = (fn,_,js,i1,i2)=>(js=fn+'',i1=js.indexOf('{'),i2=js.lastIndexOf('}'),js.slice(i1+1,i2));
+        
+        
+        var files     = await zip.rd(blob);
+        files.forEach(({name,blob})=>files[name]=blob);
+        files['ffmpeg-core.wasm']   = window.URL.createObjectURL(files['ffmpeg-core.wasm']);
+        var txt       = ['ffmpeg-core.js','index.js','ffmpeg.js','814.ffmpeg.js'];
+        await Promise.all(txt.map(async name=>files[name]=await files[name].text()));
+        
+        var sandbox       = {};
+        
+        sandbox.worker    = function(){
+
+              self.fetch        = url=>new Promise(async res=>res(new Response('Not Found',{status:404})));
+              self.onmessage    = ({data:{lib,file}})=>{var importScripts=()=>self.eval(lib);eval(file)}
+                                  
+        }//worker        
+        
+        sandbox.main    = function(){
+                                  
+        (()=>{
+        
+              var globalThis    = {document:{currentScript:{src:'https://null.com/'}}};
+              function Worker(url){
+                                                                                console.log('worker-sandbox',`${url}`);
+                    var js        = fnstr(sandbox.worker);
+                    var blob      = new Blob([js]);
+                    var url2      = window.URL.createObjectURL(blob);
+                    var worker    = new window.Worker(url2);
+                    var lib       = files['ffmpeg-core.js'];
+                    var name      = url.pathname.split('/').at(-1);
+                    var file      = files[name];
+                    worker.postMessage({lib,file});
+                    return worker;
+                    
+              }//worker
+  
+              eval(files['ffmpeg.js']);
+              
+        })();
+                    
+        }//main        
+        
+        eval(fnstr(sandbox.main));
+        eval(files['index.js']);        
+
+        var {fetchFile}   = FFmpegUtil;
+        var {FFmpeg}      = FFmpegWASM;
+        
+        var ffmpeg        = new FFmpeg();
+        await ffmpeg.load({coreURL:'ffmpeg-core.js',wasmURL:files['ffmpeg-core.wasm']});
+
+        ffmpeg.on('log',({message})=>console.log(message));
+        await ffmpeg.exec(['-version']);
+        
+        
+})();
+
+
+