What is Podcasting?
Podcasting is delivering audio content to iPod's and other portable media players on demand, so that it can be listened to at the user's convenience. The main benefit of podcasting is that listeners can sync content to their media player and take it with them to listen whenever they want to. Because podcasts are typically saved in MP3 format, they can also be listened to on nearly any computer.
The term podcasting was popularized by media entrepreneur and former MTV VJ Adam Curry. Curry created an Apple script application that automated the process of downloading and syncing audio files to iPod's.
Podcasting in 4 Steps
- Publishers create audio content, and post it to a web server, typically in MP3 format.
- They publish an RSS file (news feed) that contains RSS news items that reference the audio content. Each RSS item provides meta information about an audio file, such as the file's name and description, and contains an RSS enclosure with the URL of the audio file.
- End-users regularly check for new versions of the news feed, using an application like iPodder. When a new version is found, iPodder reads through it, identifies the audio file URL's, downloads them and syncs them to a media player.
- Users listen to the "podcasts" audio file when it is convenient.
Podcasting has been described as TiVo for Internet audio, because it lets users save content digitally, and replay it at their convenience. This comparison, though, only addresses the idea of time-shifting, and not the idea that podcasting lowers barriers to entry, creates an alternate distribution model for audio content or that it lets publishers extend the reach of Internet content to times when people aren't even connected.
Podcasting can be used for publishing any type of audio, and some developers are exploring the idea of using the same techniques to publish video and other types of content.
Podcasting is spreading quickly because of the rapid adoption of MP3 players, and the desire of owners to have fresh content.
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Think of your iPod as having a set of subscriptions that are checked regularly
for updates. Today there are a limited number of programs available this way.
The format used is RSS 2.0 with enclosures.