1. Msnbc.com Video Still Not Supported In Firefox Or Safari For Mac Download
2. Msnbc.com Video Still Not Supported In Firefox Or Safari For Mac Windows 10

Audio and Video HTML In their simplest form, the and tags require only a src attribute to identify the media, although you generally want to set the controls attribute as well. Safari allocates space, provides a default controller, loads the media, and plays it when the user clicks the play button. It’s all automatic.

There are optional attributes as well, such as autoplay, loop, height, and width. Basic Syntax The attributes for the and tags are summarized in. The only difference between the and tag attributes is the option to specify a height, width, and poster image for video. Table 1-1 Attributes of the and elements Attribute Value Description preload This attribute was formerly named autobuffer, and was boolean.

None metadata auto none—Safari should not preload media data. Metadata—Safari should preload only media metadata. Automatic—Safari should preload all media data.

Autoplay Boolean—any value sets this to true If present, asks the browser to play the media automatically. Controls Boolean—any value sets this to true If present, causes the browser to display the default media controls. Height (video only) pixels The height of the video player. Loop Boolean—any value sets this to true If present, causes the media to loop indefinitely.

This attribute is supported in iOS 5.0 and later. Poster (video only) url of image file If present, shows the poster image until the first frame of video has downloaded. Src url The URL of the media. Width (video only) pixels The width of the video player.

Important: Several of the attributes are boolean. No value is required. Set the attribute true by including it; set it false by omitting it. Although boolean attributes can be set to false using JavaScript, any value in the HTML tag sets them to true. Controls='controls', for example, is the same as controls=true or simply controls. Even controls=false sets controls to true in HTML. The preload attribute is a hint to the browser, telling it your preferences.

There is no guarantee that you will get the behavior that you prefer. Safari does not support all preferences on all devices, and does not currently support the Metadata preference on any device. For more information, see. Listing 1-1 shows an HTML page that autoplays a video at a specified height and width with the built-in user controls. Listing 1-1 Creating a simple movie player.

If no height or width is specified, a default size of 150 x 300 pixels is allocated in the webpage. On iPad, the video currently plays in this default space. On iPhone or iPod touch, the video plays in fullscreen mode once the user initiates it, and the default space is allocated to a placeholder on the webpage.

In Safari on the desktop, the movie metadata is downloaded automatically whenever possible, so the native video size is used as the default. If only the height or width parameter is specified, the video is scaled up or down to that height or width while maintaining the native aspect ratio of the movie. If both height and width are specified, the video is presented at that size. If neither is specified, the video is displayed at its native size. Enabling the Controller In Safari, the default video controller is slightly translucent and is overlaid on the bottom of the video.

The controller is not normally visible when the movie is playing—it appears only when the movie is paused, when the user touches the video, or when the mouse pointer hovers over the playing movie. In cases where it is crucial that the bottom of the video never be obscured, omit the controls attribute. (You cannot set the attribute to false explicitly in HTML—you set it to false implicitly by leaving the attribute out.) If you do not set the controls attribute, you must either set the autoplay attribute, create a controller using JavaScript, or play the movie programmatically from JavaScript. Otherwise the user has no way to play the movie.

Instead of using the src attribute in the media element itself, follow the or tag with one or more elements, prior to the closing tag. Specifying Multiple Media Formats List the alternate media sources in the order of most desirable to least desirable.

Msnbc.com Video Still Not Supported In Firefox Or Safari For Mac Download

The browser chooses the first listed source that it thinks it can play. For example, if you have an AAC audio file, an Ogg Vorbis audio file, and a WAVE audio file, listed in that order, Safari plays the AAC file. A browser that cannot play AAC but can play Ogg plays the Ogg file. A browser that can play neither Ogg nor AAC might still be able to play the WAVE file. Listing 1-3 is a simple example of using multiple sources for an audio file.

Listing 1-3 Specifying multiple audio sources. Notice that you don’t have to know which browsers support what formats, and then sniff the user agent string for the browser name to decide what to do. Just list your available media, preferred format first, second choice next, and so on. The browser plays the first one it can. Currently, most browsers support low-complexity AAC and MP3 audio and basic profile MPEG-4.

Most browsers that do not support these formats support Theora video and Vorbis audio using the Ogg file format. Generally speaking, if you provide media in MPEG-4 (basic profile) and Ogg formats, your media can play in browsers that support HTML5. Note: Safari on iOS supports low-complexity AAC audio, MP3 audio, AIF audio, WAVE audio, and baseline profile MPEG-4 video. Safari on the desktop (Mac OS X and Windows) supports all media supported by the installed version of QuickTime, including any installed third-party codecs. Specifying Multiple Delivery Schemes You can also use multiple source elements to specify different delivery schemes. Let’s say you have a large real-time video streaming service that uses RTSP streaming, and you want to add support for Safari on iOS, including iPad, using HTTP Live Streaming, along with a progressive download for browsers that can’t handle either kind of streaming.

As shown in Listing 1-4, with HTML5 video it’s quite straightforward. Listing 1-4 Specifying multiple delivery schemes.

Msnbc.com Video Still Not Supported In Firefox Or Safari For Mac Windows 10

Bandwidth is not tested. To provide multiple bandwidths, you must provide a src attribute that specifies a source capable of supporting data rate selection itself. For example, if one of your sources is an HTTP Live Stream, the playlist file can specify multiple streams, and Safari selects the best stream for the current bandwidth dynamically as network bandwidth changes. For more information, see.

Similarly, if the source is a QuickTime reference movie, it can include alternate sources at different data rates, and Safari chooses the best source for the current bandwidth when the video is first requested (though it does not dynamically switch between sources if available bandwidth subsequently changes). For more information, see Specifying Fallback Behavior It’s easy to specify fallback behavior for browsers that don’t support the or elements—just put the fallback content between the opening and closing media tags, after any elements. See Listing 1-5. Listing 1-5 Adding simple fallback behavior. Note: Browsers that understand the and tags do not display fallback content, even if they cannot play any of the specified media.

To provide fallback content in case no specified media is playable, see. Fall Back to the QuickTime Plug-in There is a simple way to fall back to the QuickTime plug-in that works for nearly all browsers—download the prebuilt JavaScript file provided by Apple, acquicktime.js, from and include it in your webpage by inserting the following line of code into your HTML head.

Fall Back to Any Plug-In Since most browsers now support the and elements, you can simplify the process of coding for plug-ins by including only the version of the tag that works with Internet Explorer as your fallback for HTML5 media. Listing 1-7 uses HTTP Live Streaming for browsers that support it, MPEG-4 and Ogg Vorbis by progressive download for browsers that support those formats, and falls back to a plug-in for versions of Internet Explorer that don’t support HTML5. Listing 1-7 Falling back to a plug-in for IE.