Flash Video. Flash Video is currently the de facto standard for web-based streaming video (over RTMP).
Notable users of it include YouTube, Hulu, VEVO, Yahoo! Video, metacafe, Reuters.com, and many other news providers. The standards documentation for BBC Online states that the BBC now preferentially accepts Flash videos for submission, to the disadvantage of other formats previously in use on its sites[3] such as RealVideo or WMV. Flash Video FLV files usually contain material encoded with codecs following the Sorenson Spark or VP6 video compression formats.
The most recent public releases of Flash Player (collaboration between Adobe Systems and MainConcept) also support H.264 video and HE-AAC audio.[4] All of these compression formats are currently restricted by patents. History[edit] Support for video in SWF file format was added in Flash Player 6, released in 2002. Initial format since 2002 is Flash Video, file suffix is .flv with a MIME derived Internet media type of video/x-flv. Encoding[edit] Adobe Flash. Flash manipulates vector and raster graphics to provide animation of text, drawings, and still images.
It allows bidirectional streaming of audio and video, and it can capture user input via mouse, keyboard, microphone and camera. Flash applications and animations can be programmed using the object-oriented language called ActionScript. Adobe Flash Professional is the most popular and user-friendly authoring tool for creating the Flash content, which also allows automation via the JavaScript Flash language (JSFL). History[edit] Open Screen Project[edit] As of February 2009[update], the specifications removing the restrictions on the use of SWF and FLV/F4V specs have been published.[6] The Flash Cast protocol—now known as the Mobile Content Delivery Protocol—and AMF protocols have also been made available,[6] with AMF available as an open source implementation, BlazeDS.
As of 2012[update], the Open Screen Project is no longer accepting new applications according to partner BSQuare. Flash Website: Advantages and Disadvantages « Boutros AbiChedid. Are you considering a Flash Website?
If so, it is important to understand the advantages and disadvantages of Flash Websites. Flash is a multimedia platform used to add animation, video, and interactivity. Flash is a powerful authoring tool, but like any tool some things are best solved with Flash, while others are not. Advantages: Reasons to Use Flash Flash use in advertising and online games is increasingly common. 1. Flash is browser independent. 2. Flash can be used to replace text elements on HTML Web pages with Flash equivalents. 3.
Flash supports audio, animation, and advanced video handling and interactivity. 4. Flash is vector based and hence a lightweight option for animation with smaller file size as opposed to real movie files that are raster based with much larger file size. Disadvantages: Reasons NOT to Use Flash Flash is a powerful tool for delivering animation, games, shopping carts, vector graphics, and sound effects. Building an All-Flash Website is wrong. Jobs: Why Apple banned Flash from the iPhone. In a rare open letter published Thursday , Apple Chief Executive Steve Jobs has detailed the technological reasons behind his company's refusal to let Adobe Systems' Flash Player onto the iPhone : he thinks it's a relic, not the future.
"Flash was created during the PC era--for PCs and mice," Jobs said in the letter. "New open standards created in the mobile era, such as HTML5, will win on mobile devices (and PCs too). Perhaps Adobe should focus more on creating great HTML5 tools for the future, and less on criticizing Apple for leaving the past behind. " Jobs also knocked Flash for being proprietary, sapping battery power, not supporting multitouch interfaces, posing security risks, and being unstable. "Flash is the No. 1 reason Macs crash," Jobs said.
Overall, his message is this: Flash is flawed, Apple doesn't need it, and the company is using its considerable power and influence to make it obsolete. Jobs' open letters are unusual but not unknown. --Apple CEO Steve Jobs. Flash Video Technology and Optimizations. Video Technology Center.