HTML5 Visualisation Demo

html5 audio streaming

HTML5 Visualisation Demo

Descripcion del Video
HTML5 is really powerful especially with the latest browsers which can pass huge amounts of processing power to the graphics card. Here I show a demonstration of trance like visual effects created using HTML5. This is part of the user interface development for Sonic Field which is an audio synthesis and processing package. The UI is in HTML5 so I needed a way of creating audio visualisations in HTML5. The visualiser is not yet linked up to the audio stream and it only renders circles. However, this is just a few hours work! The effect was so amazing that I though I should put it up here. If you are interested, the trick to getting it to work is to use an HTML5 canvas to scale the contents of its self using the graphics card. In Chrome on my MBPR the CPUs are not loaded all that much as nearly all the processing is passed onto the video card. Here is the most important part of the Javascript: function repaint(){ var imgD1=context.getImageData(0,0,canvas.wi ­dth,canvas.height); var scale=0.05 var scaleFactor=1+scale; hContext.putImageData(imgD1,0,0); context.scale(scaleFactor,scaleFactor); var sx=canvas.width*scale/2; var sy=canvas.height*scale/2; context.translate(-sx+1.6,-sy+1.1) context.globalAlpha=0.1; context.drawImage(hCanvas,0,0); context.globalAlpha=1.0; if((Math.random()*20)>19){ context.lineWidth = 2; var c="rgb(" + Math.floor(Math.random()*255) + "," + Math.floor(Math.random()*255) + ","+ Math.floor(Math.random()*255) + ")"; context.strokeStyle = c; } var radius=Math.random()*50; context.setTransform(1,0,0,1,0,0); context.beginPath(); context.arc(canvas.width/2,canvas.height ­/2,radius,0,2*Math.PI,true); context.stroke(); requestAnimationFrame(repaint); } The music is created by myself using Sonic Field

tutor de como generar reproductor flash de streaming de audio para mi web o blog

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Pequeño video tutor de como crear un agradable reproductor flash para los clientes de mi1radio.com

How to add audio to your site with player controls

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~/ on the Range

Descripcion del Video
Kit Cambridge shows you how to handle range requests for the HTTP/1.1 spec and Node.js in this video from HTML5 Dev Conf: What do download accelerators, streaming video, and the HTML 5 audio element have in common? They all rely on range requests to transmit data efficiently. Range requests are HTTP's brilliantly simple answer to the question, "How do I download just a portion of a given file?" Although they're supported by most web frameworks, Node doesn't handle range requests out of the box. To that end, we'll be going down to the bare metal as we examine the relevant portions of the HTTP/1.1 spec, learn how to handle such requests correctly, and discuss why they're so useful. ** More educational videos on open source development at /s/

Advanced SHOUTcast Flash/HTML5 Player

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/player - Our advanced player suite for SHOUTcast users enables viral radio station sharing via Facebook. Plus solves the memory leak problem associated with conventional flash players.

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