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DoctypeHTML5 (Hyderabad) Presentation on Multimedia
DoctypeHTML5 (Hyderabad) Presentation on Multimedia
DoctypeHTML5 (Hyderabad) Presentation on Multimedia
DoctypeHTML5 (Hyderabad) Presentation on Multimedia
DoctypeHTML5 (Hyderabad) Presentation on Multimedia
DoctypeHTML5 (Hyderabad) Presentation on Multimedia
DoctypeHTML5 (Hyderabad) Presentation on Multimedia
DoctypeHTML5 (Hyderabad) Presentation on Multimedia
DoctypeHTML5 (Hyderabad) Presentation on Multimedia
DoctypeHTML5 (Hyderabad) Presentation on Multimedia
DoctypeHTML5 (Hyderabad) Presentation on Multimedia
DoctypeHTML5 (Hyderabad) Presentation on Multimedia
DoctypeHTML5 (Hyderabad) Presentation on Multimedia
DoctypeHTML5 (Hyderabad) Presentation on Multimedia
DoctypeHTML5 (Hyderabad) Presentation on Multimedia
DoctypeHTML5 (Hyderabad) Presentation on Multimedia
DoctypeHTML5 (Hyderabad) Presentation on Multimedia
DoctypeHTML5 (Hyderabad) Presentation on Multimedia
DoctypeHTML5 (Hyderabad) Presentation on Multimedia
DoctypeHTML5 (Hyderabad) Presentation on Multimedia
DoctypeHTML5 (Hyderabad) Presentation on Multimedia
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DoctypeHTML5 (Hyderabad) Presentation on Multimedia

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Slides for the session on HTML5 at DoctypeHTML5 in Hyderabad about Multimedia. …

Slides for the session on HTML5 at DoctypeHTML5 in Hyderabad about Multimedia.

Topics covered include Canvas, Audio, Video, SVG, WebGL
http://nparashuram.com

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Transcript

  • 1. HTML5 Multimedia<br />Canvas, Audio, Video and more..<br />
  • 2. Agenda<br />Canvas<br />Audio<br />Video<br />SVG<br />WebGL<br />
  • 3. whoami /r<br />Parashuram<br />Work for a company that makes browsers<br />Web Enthusiast – spends time writing code<br />Worked on IndexedDB standards and demos<br />http://nparashuram.com<br />http://blog.nparashuram.com<br />@nparashuram<br />
  • 4. Canvas<br />
  • 5. Pixel based drawing surface<br />2d context<br />The drawing API<br />Lines and Curves<br />Fille and Gradients<br />Image data, security context<br />GPU accelerated, possible trace-JITed JS code<br />Works well with Videos, WebWorkers<br />Canvas<br />
  • 6. Canvas - Code<br /><canvas id = “myCanvas” width = “100px” height = “100px” style = “width:200px;height:200px”><br />Canvasnot supported<br /></canvas><br /><script><br />varelem= document.getElementById('myCanvas');<br /></script><br />
  • 7. Canvas - Code<br />varcontext = elem.getContext('2d');<br />context.fillRect(0, 0, 150, 100);<br />context.moveTo(10, 10); <br />context.lineTo(100, 10); <br />context.stroke();<br />context.closePath();<br />context.drawImage(img_elem, dx, dy, dw, dh);<br />
  • 8. Canvas - Code<br />context.font = 'italic 30px sans-serif'; <br />context.strokeText('Hello world!', 0, 50);<br />context.fillText ('Hello world!', 0, 0);<br />context.shadowColor = 'rgba(255, 0, 0, 0.5)';<br />context.shadowBlur = 4;<br />context.shadowColor = 'rgba(255, 0, 0, 0.5)';<br />context.fillRect(20, 20, 150, 100);<br />var g= context.createLinearGradient(sx, sy, dx, dy);<br />context.fillStyle = g; <br />
  • 9. Canvas - Demos<br />http://canvaspaint.org/<br />http://nparashuram.com/seamcarving/index.html<br />http://www.canvasdemos.com/type/games/<br />http://www.benjoffe.com/code/demos/canvascape/<br />http://caniuse.com/#search=canvas<br />
  • 10. Video<br />Native support to play video in browser<br />Codecs (What data is stored)<br />H.264<br />Theora<br />VP8<br />Containers (How data is stored)<br />MPEG4<br />Flash<br />Ogg<br />WebM<br />Should be Served with correct MIME-TYPE<br />Fallback mechanism<br />
  • 11. Video - Code<br /><video <br />poster="star.png" autoplay loop preload controls ><br /><sourcesrc="movie.webm" <br /> type='video/webm; codecs="vp8, vorbis"' /><br /> <sourcesrc="movie.mp4" <br /> type='video/mp4;codecs="avc1.42E01E,mp4a.40.2"'/><br />Video tag not supported. Use Flash Tags here or<br />Download <a href="movie.webm">here</a>.<br /><video><br />
  • 12. Video - Code<br />video.play(); video.pause()<br />video.playbackRate = 0.8;<br />video.addTrack(kind, label, language) <br />onPlay, canplaythrough, progress, stalled, loadeddata, loadedmetadata, waiting, <br />
  • 13. Video - Demos<br />http://html5demos.com/video<br />http://html5demos.com/two-videos<br />http://sublimevideo.net/demo<br />http://caniuse.com/video<br />
  • 14. Audio<br />Native support for sound<br />Controls, API similar to Video<br />Play audio files, control playback<br />Audio Data API – work in progress<br />
  • 15. Audio - Code<br /><audiocontrols preload="auto" autobuffer><br />  <sourcesrc="elvis.mp3" /><br /> <sourcesrc="elvis.ogg" /><br /> <!-- now include flash fall back --><br /></audio><br />
  • 16. Audio - Demos<br />http://www.jplayer.org/latest/demo-01/#<br />http://tinyurl.com/4v8yu42<br />http://apm.ircam.fr/page/audio-tag/<br />
  • 17. SVG<br />XML Based Scalable Vector Graphics<br />Embed inline in HTML<br />Scalable Images <br />Elements scriptable on DOM<br />SVG in CSS as background images<br />SVG Filters for Video<br />
  • 18. SVG - Code<br /><svgxmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" width='300px' height='300px'><br /> <title> Small SVG example </title><br /><circle cx='120' cy='150' r='60' style='fill: gold;'><br /> <animateattributeName='r' from='2' to='80' begin='0' dur='3' repeatCount='indefinite' /><br /></circle><br /> <polyline points='120 30, 25 150, 290 150' <br /> stroke-width='4’ <br /> stroke='brown' style='fill: none;' /><br /><text x='60' y='250' fill='blue'><br />Hello, World!<br /></text><br /></svg> <br />
  • 19. SVG - Demo<br />http://svg-edit.googlecode.com/svn/branches/2.4/editor/svg-editor.html<br />http://slides.html5rocks.com/#inline-svg<br />http://caniuse.com/svg-html5<br />
  • 20. WebGL<br />3D Graphics API<br />Based on OpenGL ES 2.0<br />On Canvas element<br />Learning WebGL<br />Demos<br />http://www.ambiera.com/coppercube/webgldemos.html<br />http://www.khronos.org/webgl/wiki/Demo_Repository<br />
  • 21. Demos<br />http://www.craftymind.com/factory/html5video/CanvasVideo.html<br />https://developer.mozilla.org/samples/video/chroma-key/index.xhtml<br />http://people.mozilla.com/~prouget/demos/DynamicContentInjection/play.xhtml<br />http://media.chikuyonok.ru/ambilight/<br />http://9elements.com/io/projects/html5/canvas/<br />http://www.canvasdemos.com/<br />

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