Video podcast (sometimes shortened to vodcast) is a term used for the online delivery of video on demand video clip content via Atom or RSS enclosures. The term is used to distinguish between podcasts which most commonly contain audio files and those referring to the distribution of video where the RSS feed is used as a non-linear TV channel to which consumers can subscribe using a PC, TV, set-top box, media center or mobile multimedia device. Web television series are often distributed as video podcasts.
However, the term podcast has from its inception described the distribution of digital media files, including video and audio via RSS enclosures and hence the terms video podcast, vodcast, and less commonly vidcast, are redundant.
Technology and history
From a web server, a video podcast can be distributed as a file or as a stream. Both methods have their advantages and disadvantages. Downloading complete video podcasts in advance gives the user the ability to play the video podcasts offline on, for example, a portable media player. A downloaded version can be watched many times with only one download, reducing bandwidth costs in this case. Streaming allows seeking (skipping portions of the file) without downloading the full video podcast, better statistics and lower bandwidth costs for the servers; however, users may have to face pauses in playback caused by slow transfer speeds.A podcast client may work with a separate, or integrated player. One such example of the latter is iTunes, which is an unusual case of a web feed aggregator being added to a media player rather than vice versa.
Timeline
- On 1 January 2004 Steve Garfield launches his video blog and declares that 2004 would be the year of the video blog.[1][2]
- On 1 November 2004 Steve Garfield launches Steve Garfield's VideoPodcast to test distribution of RSS video enclosures with a video blog. RSS Feed iTunes feed
- On October 1, 2005 Terra: The Nature of Our World launched making it the first Natural History video podcast. It is produced in conjunction with the MFA program in Science & Natural History Filmmaking at Montana State University, Filmmakers for Conservation, and PBS.[3]
- On October 14, 2005 Steve Jobs introduced the new "iPod with video" at the Keynote speech of Macworld 2005. The Video podcasts Tiki Bar TV and Rocketboom are mentioned, and Jobs shows a brief clip of Tiki Bar TV to the audience. The image of Kevin Gamble, one of the co-creators of Tiki Bar TV, is featured on Apple's homepage for a month next to U2's Bono.
- On June 8, 2006, the German chancellor, Angela Merkel, launched her video podcast via the Chancellor's website, making her the first head of government to issue a regular video podcast.[4]
- On December 16, 2006, Time magazine named its Person of the Year as "You", referring to independent content creators on the web and video podcasters in particular. Crash Test Kitchen, a video podcast begun in April 2005 by home cooks Waz and Lenny, was featured in the magazine as an example of this phenomenon. The magazine itself was a distinctive issue that featured a flexible mirror on the cover.
- On April 13, 2007, the British panel game Have I Got News for You started to broadcast a vodcast called Have I Got News for You: The Inevitable Internet Spin-off. The first HIGNFY vodcast was presented by Jeremy Clarkson.
- May 10, 2007, Feed Me Bubbe featured in The Wall Street Journal by Jessica E. Vascellaro who wrote an article, discussing "Feed Me Bubbe" that was distributed by The AP Datastream ("Using Youtube for posterity," May 10, 2007)
- Another British panel game, QI, also announced that it would create a vodcast, starting in Series E. However, this was changed into a set of "Quickies", not downloadable and only viewable from the BBC website.[5]
- On November 25, 2007, Neil Fairbrother was featured in the Sunday Observer's Courvoisier Future 500 for creating pod3.tv, a web TV channel that creates and distributes TV shows as video podcasts.
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PODCAST
A podcast (or non-streamed webcast) is a series of digital media files (either audio or video) that are released episodically and often downloaded through web syndication. The word usurped webcast in common vernacular, due to rising popularity of the iPod and the innovation of web feeds.
The mode of delivery differentiates podcasting from other means of accessing media files over the Internet, such as direct download, or streamed webcasting. A list of all the audio or video files currently associated with a given series is maintained centrally on the distributor's server as a web feed, and the listener or viewer employs special client application software known as a podcatcher that can access this web feed, check it for updates, and download any new files in the series. This process can be automated so that new files are downloaded automatically. Files are stored locally on the user's computer or other device ready for offline use, giving simple and convenient access to episodic content.[1][2] Commonly used audio file formats are Ogg Vorbis and MP3. In many respects, this is closer to traditional publishing models associated with books and magazines (as opposed to radio, which uses a live stream).
SCREENCAST
A screencast is a digital recording of computer screen output, also known as a video screen capture, often containing audio narration. Although the term screencast dates from 2004, products such as Lotus ScreenCam were used as early as 1994.[1][2] Early products produced large files and had limited editing features. More recent products support more compact file formats such as Adobe Flash and have more sophisticated editing features, allowing relatively easy changes in sequence, mouse movement, audio, etc.
A screenshot is a picture of a computer screen; a screencast is essentially a movie of the changes over time that a user sees on a computer screen, enhanced with audio narration.
WEB TELEVISION
Web television, also commonly referred to as Web TV, not to be confused with Internet television or Catch up TV, is an emerging genre of digital entertainment that is distinct from traditional broadcast television. Delivered originally online via broadband and mobile networks, Web television shows, or Web series, are short-form in nature (2–9 minutes per episode), episodic, and produced in seasons. Some notable series include Dr. Horrible's Sing-Along Blog, The Guild, Prom Queen, Homestar Runner, Roommates and others. Major web television networks include The WB.com, Hulu, MySpace, YouTube, Newgrounds, Blip.tv, and Crackle. Major web television production companies include Next New Networks, Vuguru, Revision3, Deca, Generate LA-NY, and Take180.
In 2008, the International Academy of Web Television was founded with the mission to organize and support the community of web television creators, actors, producers and executives. It administers the selection of winners for the Streamy Awards.
TRICASTER
TriCaster is a product from NewTek that merges broadcast video, graphics and presentations. TriCaster was launched at NAB 2005, where it won several industry awards, including NAB's AIM (Award for Innovation in Media) award and garnered an Emmy Nomination.
TriCaster uses Video Toaster [VT] hardware installed in a custom Shuttle PC case containing all the necessary video and audio inputs/outputs for a small live presentation. The Standard Definition TriCaster software runs atop Windows XP Service Pack 2. [1] The High Definition TriCaster software runs atop Windows Vista. [2]
1 comment:
vodcast is a new concept of data transfer. we already known about podcast and screencast. but there are many other things i.e. tricaster and videocast. videocast is the full name of vodcast. the main data transferred through this channel is video data. there is many hope to transfer data to many operational project at any field. library is also includes in this list. because library can collect and transfer huge data of video format through proper channel. and it will be help the user and scholer and others.
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