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Development of Multimedia WebApp on Tizen Platform 1. HTML Multimedia 2. Multimedia Playing with HTML5 Tags (1) HTML5 Video (2) HTML5 Audio (3) HTML Pulg-ins (4) HTML YouTube (5) Accessing Media Streams and Playing (6) Multimedia Contents Mgmt (7) Capturing Images 3. Multimedia Processing Web Device API Multimedia WepApp on Tizen - 1 - 1. HTML Multimedia • What is Multimedia ? − Multimedia comes in many different formats. It can be almost anything you can hear or see. − Examples : Pictures, music, sound, videos, records, films, animations, and more. − Web pages often contain multimedia elements of different types and formats. • Multimedia Formats − Multimedia elements (like sounds or videos) are stored in media files. − The most common way to discover the type of a file, is to look at the file extension. ⇔ When a browser sees the file extension .htm or .html, it will treat the file as an HTML file. ⇔ The .xml extension indicates an XML file, and the .css extension indicates a style sheet file. ⇔ Pictures are recognized by extensions like .gif, .png and .jpg. − Multimedia files also have their own formats and different extensions like: .swf, .wav, .mp3, .mp4, .mpg, .wmv, and .avi. Multimedia WepApp on Tizen - 2 - 2. Multimedia Playing with HTML5 Tags (1) HTML5 Video • Some of the popular video container formats include the following: Audio Video Interleave (.avi) Flash Video (.flv) MPEG 4 (.mp4) Matroska (.mkv) Ogg (.ogv) • Browser Support Multimedia WepApp on Tizen - 3 - • Common Video Format Format File Description .mpg MPEG. Developed by the Moving Pictures Expert Group. The first popular video format on the MPEG .mpeg web. Used to be supported by all browsers, but it is not supported in HTML5 (See MP4). AVI (Audio Video Interleave). Developed by Microsoft. Commonly used in video cameras and AVI .avi TV hardware. Plays well on Windows computers, but not in web browsers. WMV (Windows Media Video). Developed by Microsoft. Commonly used in video cameras and WMV .wmv TV hardware. Plays well on Windows computers, but not in web browsers. QuickTime. Developed by Apple. Commonly used in video cameras and TV hardware. Plays QuickTime .mov well on Apple computers, but not in web browsers. (See MP4) .rm RealVideo. Developed by Real Media to allow video streaming with low bandwidths. It is still RealVideo .ram used for online video and Internet TV, but does not play in web browsers. .swf Flash. Developed by Macromedia. Often requires an extra component (plug-in) to play in web Flash .flv browsers. Ogg .ogg Theora Ogg. Developed by the Xiph.Org Foundation. Supported by HTML5. .web WebM. Developed by the web giants, Mozilla, Opera, Adobe, and Google. Supported by WebM m HTML5. MP4. Developed by the Moving Pictures Expert Group. Based on QuickTime. Commonly used MPEG-4 .mp4 in newer video cameras and TV hardware. Supported by all HTML5 browsers. Recommended or MP4 by YouTube. − Only MP4, WebM , and Ogg video are supported by the newest HTML5 standard. Multimedia WepApp on Tizen - 4 - • Video Tag − Until now, there has not been a standard for showing a video/movie on a web page. − Today, most videos are shown through a plug-in (like flash ). However, different browsers may have different plug-ins. − HTML5 defines a new element which specifies a standard way to embed a video/movie on a web page: the <video> element. ⇔ The control attribute adds video controls, like play, pause, and volume. − Text between the <video> and </video> tags will only display in browsers that do not support the <video> element. − The <video> element allows multiple <source> elements. ⇔ <source> elements can link to different video files. ⇔ The browser will use the first recognized format . <video width="320" height="240" controls="controls"> <source src="movie.mp4" type="video/mp4" /> <source src="movie.ogg" type="video/ogg" /> Your browser does not support the video tag. </video > http://www.w3schools.com/html/tryit.asp?filename=tryhtml5_video_all − To start a video automatically use the autoplay attribute: ⇔ <video width="320" height="240" autoplay > Multimedia WepApp on Tizen - 5 - − Example http://www.w3schools.com/html/tryit.asp?filename=tryhtml5_video_js_prop <!DOCTYPE html> <html> <body> <div style="text-align:center"> <button onclick ="playPause()">Play/Pause</button> <button onclick ="makeBig()">Big</button> <button onclick ="makeSmall()">Small</button> <button onclick ="makeNormal()">Normal</button> <br /> <video id="video1" width="420"> <source src="mov_bbb.mp4" type="video/mp4" /> <source src="mov_bbb.ogg" type="video/ogg" /> Your browser does not support HTML5 video. </video> </div> <script type="text/javascript"> var myVideo=document.getElementById("video1"); function playPause() { if (myVideo.paused) myVideo.play(); else myVideo.pause(); } function makeBig() { myVideo.width=560; } function makeSmall() { myVideo.width=320; } function makeNormal() { myVideo.width=420; } </script> <p>Video courtesy of <a href="http://www.bigbuckbunny.org/" target="_blank">Big Buck Bunny</a>.</p> </body> </html> Multimedia WepApp on Tizen - 6 - • HTML Audio and Video DOM Reference − The HTML5 DOM has methods, properties, and events for the <audio> and <video> elements. − These methods, properties, and events allow you to manipulate <audio> and <video> elements using JavaScript. − HTML Audio/Video Methods Method Description addTextTrack() Adds a new text track to the audio/video canPlayType() Checks if the browser can play the specified audio/video type load() Re-loads the audio/video element play() Starts playing the audio/video pause() Pauses the currently playing audio/video Multimedia WepApp on Tizen - 7 - − HTML Audio/Video Properties Property Description audioTracks Returns an AudioTrackList object representing available audio tracks autoplay Sets or returns whether the audio/video should start playing as soon as it is loaded buffered Returns a TimeRanges object representing the buffered parts of the audio/video controller Returns the MediaController object representing the current media controller of the au dio/video controls Sets or returns whether the audio/video should display controls (like play/pause etc.) crossOrigin Sets or returns the CORS settings of the audio/video currentSrc Returns the URL of the current audio/video currentTime Sets or returns the current playback position in the audio/video (in seconds) defaultMuted Sets or returns whether the audio/video should be muted by default defaultPlaybackRate Sets or returns the default speed of the audio/video playback duration Returns the length of the current audio/video (in seconds) ended Returns whether the playback of the audio/video has ended or not Multimedia WepApp on Tizen - 8 - Property Description error Returns a MediaError object representing the error state of the audio/video loop Sets or returns whether the audio/video should start over again when finished Sets or returns the group the audio/video belongs to (used to link multiple audio/video el mediaGroup ements) muted Sets or returns whether the audio/video is muted or not networkState Returns the current network state of the audio/video paused Returns whether the audio/video is paused or not playbackRate Sets or returns the speed of the audio/video playback played Returns a TimeRanges object representing the played parts of the audio/video preload Sets or returns whether the audio/video should be loaded when the page loads readyState Returns the current ready state of the audio/video seekable Returns a TimeRanges object representing the seekable parts of the audio/video seeking Returns whether the user is currently seeking in the audio/video src Sets or returns the current source of the audio/video element startDate Returns a Date object representing the current time offset textTracks Returns a TextTrackList object representing the available text tracks videoTracks Returns a VideoTrackList object representing the available video tracks volume Sets or returns the volume of the audio/video Multimedia WepApp on Tizen - 9 - − HTML Audio/Video Events Event Description abort Fires when the loading of an audio/video is aborted canplay Fires when the browser can start playing the audio/video Fires when the browser can play through the audio/video without stopping for b canplaythrough uffering durationchange Fires when the duration of the audio/video is changed emptied Fires when the current playlist is empty ended Fires when the current playlist is ended error Fires when an error occurred during the loading of an audio/video loadeddata Fires when the browser has loaded the current frame of the audio/video loadedmetadata Fires when the browser has loaded meta data for the audio/video loadstart Fires when the browser starts looking for the audio/video pause Fires when the audio/video has been paused play Fires when the audio/video has been started or is no longer paused Fires when the audio/video is playing after having been paused or stopped for b playing uffering progress Fires when the browser is downloading the audio/video Multimedia WepApp on Tizen - 10 - Event Description ratechange Fires when the playing speed of the audio/video is changed seeked Fires when the user is finished moving/skipping to a new position in the audio/video seeking Fires when the user starts moving/skipping to a new position in the audio/video stalled Fires when the browser is trying to get media data, but data is not available suspend Fires when the browser is intentionally not getting media data timeupdate Fires when the current playback position has changed
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