ACTIONSCRIPT 3 Developers Guide en

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ACTIONSCRIPT 3.0 DEVELOPER’S GUIDE Working with video About configuring FLV files for hosting on a server Flash Player 9 and later, Adobe AIR 1.0 and later When you work with FLV files, you might have to configure your server to work with the FLV file format. Multipurpose Internet Mail Extensions (MIME) is a standardized data specification that lets you send non-ASCII files over Internet connections. Web browsers and e-mail clients are configured to interpret numerous MIME types so that they can send and receive video, audio, graphics, and formatted text. To load FLV files from a web server, you might need to register the file extension and MIME type with your web server, so you should check your web server documentation. The MIME type for FLV files is video/x-flv. The full information for the FLV file type is as follows: Mime Type: video/x-flv File extension: .flv Required parameters: none Optional parameters: none Encoding considerations: FLV files are binary files; some applications might require the application/octet-stream subtype to be set Security issues: none Published specification: www.adobe.com/go/video_file_format Microsoft changed the way streaming media is handled in Microsoft Internet Information Services (IIS) 6.0 web server from earlier versions. Earlier versions of IIS do not require any modification to stream Flash Video. In IIS 6.0, the default web server that comes with Windows 2003, the server requires a MIME type to recognize that FLV files are streaming media. When SWF files that stream external FLV files are placed on Microsoft Windows Server® 2003 and are viewed in a browser, the SWF file plays correctly, but the FLV video does not stream. This issue affects all FLV files placed on Windows Server 2003, including files you make with earlier versions of the Flash authoring tool, and the Macromedia Flash Video Kit for Dreamweaver MX 2004 from Adobe. These files work correctly if you test them on other operating systems. For information about configuring Microsoft Windows 2003 and Microsoft IIS Server 6.0 to stream FLV video, see www.adobe.com/go/tn_19439. About targeting local FLV files on the Macintosh Flash Player 9 and later, Adobe AIR 1.0 and later If you attempt to play a local FLV from a non-system drive on an Apple® Macintosh® computer by using a path that uses a relative slash (/), the video will not play. Non-system drives include, but are not limited to, CD-ROMs, partitioned hard disks, removable storage media, and connected storage devices. Note: The reason for this failure is a limitation of the operating system, not a limitation in Flash Player or AIR. For an FLV file to play from a non-system drive on a Macintosh, refer to it with an absolute path using a colon-based notation (:) rather than slash-based notation (/). The following list shows the difference in the two kinds of notation: Slash-based notation: myDrive/myFolder/myFLV.flv Colon-based notation: (Mac OS®) myDrive:myFolder:myFLV.flv Last updated 6/6/2012 505
ACTIONSCRIPT 3.0 DEVELOPER’S GUIDE Working with video Video example: Video Jukebox Flash Player 9 and later, Adobe AIR 1.0 and later The following example builds a simple video jukebox which dynamically loads a list of videos to play back in a sequential order. This allows you to build an application that lets a user browse through a series of video tutorials, or perhaps specifies which advertisements should be played back before delivering the user’s requested video. This example demonstrates the following features of ActionScript 3.0: Updating a playhead based on a video file’s playback progress Listening for and parsing a video file’s metadata Handling specific codes in a net stream Loading, playing, pausing, and stopping a dynamically loaded FLV Resizing a video object on the display list based on the net stream’s metadata To get the application files for this sample, see www.adobe.com/go/learn_programmingAS3samples_flash. The Video Jukebox application files can be found in the folder Samples/VideoJukebox. The application consists of the following files: File Description VideoJukebox.fla or VideoJukebox.mxml The main application file for Flex (MXML) or Flash (FLA). VideoJukebox.as The class that provides the main functionality of the application. playlist.xml A file that lists which video files will be loaded into the video jukebox. Loading an external video playlist file Flash Player 9 and later, Adobe AIR 1.0 and later The external playlist.xml file specifies which videos to load, and the order to play them back in. In order to load the XML file, you need to use a URLLoader object and a URLRequest object, as seen in the following code: uldr = new URLLoader(); uldr.addEventListener(Event.COMPLETE, xmlCompleteHandler); uldr.load(new URLRequest(PLAYLIST_XML_URL)); This code is placed in the VideoJukebox class’s constructor so the file is loaded before any other code is run. As soon as the XML file has finished loading, the xmlCompleteHandler() method is called which parses the external file into an XML object, as seen in the following code: private function xmlCompleteHandler(event:Event):void { playlist = XML(event.target.data); videosXML = playlist.video; main(); } The playlist XML object contains the raw XML from the external file, whereas the videos XML is an XMLList object which contains just the video nodes. A sample playlist.xml file can be seen in the following snippet: Last updated 6/6/2012 506
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ACTIONSCRIPT ® 3.0 Developer’s G
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Contents Chapter 1: Working with da
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ACTIONSCRIPT 3.0 DEVELOPER’S GUID
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Chapter 2: Working with strings Fla
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Chapter 4: Handling errors Flash Pl
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Chapter 5: Using regular expression
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Chapter 13: Working with bitmaps Fl
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Chapter 15: Working with Pixel Bend
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Chapter 16: Working with movie clip
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Chapter 19: Working in three dimens
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Chapter 23: Using the Text Layout F
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Page 467 and 468: ACTIONSCRIPT 3.0 DEVELOPER’S GUID
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Chapter 31: Mouse input Flash Playe
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Chapter 32: Touch, multitouch and g
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Chapter 34: Accelerometer input Fla
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Chapter 38: Working with the file s
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Chapter 39: Storing local data Flas
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Chapter 42: Basics of networking an
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Chapter 43: Sockets Flash Player 9
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Chapter 49: Client system environme
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Chapter 53: Display screens in AIR
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Chapter 54: Printing Flash Player 9
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Chapter 55: Geolocation If a device
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