Flash can manipulate vector and raster graphics, and supports bidirectional streaming of audio and movie. It contains a scripting language called ActionScript.
Files in the SWF format, traditionally called "ShockWave Flash" movies, "Flash movies" or "Flash games", usually have a .swf file extension and may be an object of a web page, strictly "played" in a standalone Flash Player, or incorporated into a Projector, a self-executing Flash movie (with the .exe extension in Microsoft Windows). Flash Video files have a .flv file extension and are either utilised from within .swf files or played via a flv-aware player, such as VLC, or QuickTime and Windows Media Player with external codecs added.
Video
Flash can be employed to embed video clip in internet pages, a feature available since Flash Player version 6. The technique is to create a flash file (.swf) that offers a user interface for playing the video clip file, a so called "player". This can be what many popular video clip sites do, including YouTube and Google Movie. The actual video clip file is either an FLV or F4V file; both can easily be played by generic video clip player software. Nonetheless, getting browsers to display movie has traditionally been a platform particular issue due to lack of a internet standard for video and a common movie codec. Using Flash has the advantage of Flash Player's wide distribution, but as this really is proprietary technology for which there is no real alternative, it also makes multimedia embedded in this way notoriously hard to access for non-users of the Flash Player. A similar paradox is that while Flash as a format arguably is a de facto standard, it hardly qualifies as a standard, as there is only one complete implementation, that implementation is proprietary, and a free-software partial implementation (rtmpdump) was thought to be illegal in the USA. A web standard for movie is in development for HTML 5.
Flash Player is a browser plugin, and cannot run within a usual e-mail client, such as Outlook. Instead, a link should open a browser window. A Gmail labs feature allows playback of YouTube videos linked in emails.
There is no secret in that Flash is also utilized for creating Flash templates and Flash site layouts.
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