barcode generator code in vb.net Introducing HTML5 in Java

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Introducing HTML5
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NOTE If you are using XHTML5, given that controls is an occurrence style attribute, use
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controls="controls" to be conforming
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PART I
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You should note the included content in the tag that nonsupporting browsers fall back to The following shows Internet Explorer displaying the alternative content:
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However, even if a browser supports the video element, it might still have problems displaying the video For example, Firefox 35 won t load this particular media format directly:
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HTML5 open video has, as it currently stands, brought back the madness of media codec support that Flash solved, albeit in a less than stellar way To address the media support problem, you need to add in alternative formats to use by including a number of <source> tags:
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<video width="640" height="360" controls poster="loadingpng">
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<source src="html_5mp4" type="video/mp4"> <source src="html_5ogv" type="video/ogg"> <strong>HTML5 video element not supported</strong> </video>
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Part I:
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Core Markup
Also note in the preceding snippet the use of the poster attribute, which is set to display an image in place of the linked object in case it takes a few moments to load Other video element specific attributes like autobuffer can be used to advise the browser to download media content in the background to improve playback, and autoplay, which when set, will start the media as soon as it can A complete example of the video element in action is shown here:
<!DOCTYPE html> <html> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8"> <title>HTML5 video example</title> </head> <body> <h1>Simple Video Examples</h1> <video src="http://htmlrefcom/ch2/html_5mp4" width="640" height="360" controls> <strong>HTML5 video element not supported</strong> </video> <br><br><br> <video width="640" height="360" controls poster="loadingpng"> <source src="http://htmlrefcom/ch2/html_5mp4" type="video/mp4"> <source src="http://htmlrefcom/ch2/html_5ogv" type="video/ogg"> <strong>HTML5 video element not supported</strong> </video> </body> </html>
O NLINE http://htmlrefcom/ch2/videohtml
The reference section in 3 shows the complete list of attributes for the video element supported as of late 2009 Be warned, though, that if the various media markup efforts of the late 1990s repeat themselves, it is quite likely that there will be an explosion of attributes, many of which may be specific to a particular browser or media format
<audio>
HTML5 s audio element is quite similar to the video element The element should support common sound formats such as WAV files:
<audio src="http://htmlrefcom/ch2/musicwav"></audio>
In this manner, the audio element looks pretty much the same as Internet Explorer s proprietary bgsound element Having the fallback content rely on that proprietary tag might not be a bad idea:
<audio> <bgsound src="http://htmlrefcom/ch2/musicwav"> </audio>
2:
Introducing HTML5
If you want to allow the user to control sound play, unless you have utilized JavaScript to control this, you may opt to show controls with the same named attribute Depending on the browser, these controls may look quite different, as shown next
<audio src="http://htmlrefcom/ch2/musicwav" controls></audio>
PART I
As with the video element, you also have autobuffer and autoplay attributes for the audio element Unfortunately, just like video, there are also audio format support issues, so you may want to specify different formats using <source> tags:
<audio controls autobuffer autoplay> <source src="http://htmlrefcom/ch2/musicogg" type="audio/ogg"> <source src="http://htmlrefcom/ch2/musicwav" type="audio/wav"> </audio>
A complete example is shown here:
<!DOCTYPE html> <html> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8"> <title>HTML5 audio examples</title> </head> <body> <h1>Simple Audio Examples</h1> <h2>wav Format</h2> <audio src="http://htmlrefcom/ch2/musicwav" controls></audio> <h2>ogg Format</h2> <audio src="http://htmlrefcom/ch2/musicogg" controls></audio> <h2>Multiple Formats and Fallback</h2> <audio controls autobuffer autoplay> <source src="http://htmlrefcom/ch2/musicogg" type="audio/ogg"> <source src="http://htmlrefcom/ch2/musicwav" type="audio/wav"> <!--[if IE]> <bgsound src="http://htmlrefcom/ch2/musicwav"> <![endif]--> </audio> </body> </html>
O NLINE http://htmlrefcom/ch2/audiohtml
Part I:
Core Markup
Media Considerations
An interesting concern about open media formats is whether or not they really are open As the HTML5 specification emerges, fissures are already forming in terms of how these elements are implemented, what codecs will be supported by what browser vendors, and whether HTML5 will require a particular codec to be supported by all HTML5 compliant browsers Valid concerns about so-called submarine patents surfacing and torpedoing the open media effort are real and hotly debated Unfortunately, given this media codec chaos, at the time of this edition s writing, getting an example to work in all browsers can be quite a chore and Flash and/or QuickTime support must be added to address older browsers Simply put, for all its possibilities, so far HTML5 media is a messy solution at best The following adds in a fallback within the previous video example for Flash:
<video width="640" height="360" controls poster="loadingpng"> <source src="http://htmlrefcom/ch2/html_5mp4" type="video/mp4"> <source src="http://htmlrefcom/ch2/html_5ogv" type="video/ogg"> <object data="html_5swf" type="application/x-shockwave-flash" width="640" height="360" id="player"> <param name="movie" value="html_5swf"/> <strong>Error: No video support at all</strong> </object> </video>
Given the example, I think it isn t much of a stretch to imagine a <source> tag being set to a Flash type eventually; making the direction this is going even more confusing So while the potential benefits of open media formats can be debated endlessly, there is also the pragmatic concern of how long it will take before HTML5 s open media movement becomes viable Getting to the stable media playback world provided by Flash took many years, and it seems unlikely that HTML5 solutions will move much faster
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