OGG

WHAT IS OGG?

Ogg is a free, open container format maintained by the Xiph.Org Foundation. The creators of the Ogg format state that it is unrestricted by software patents and is designed to provide for efficient streaming and manipulation of high-quality digital multimedia. Its name is derived from "logging", jargon from the computer game Netrek.

WHEN HAS IT EMERGED?

The Ogg project began with a simple audio compression package as part of a larger project in 1993. The software was originally named Squish but due to an existing trademark, it was renamed to OggSquish. This name was later used for the whole Ogg project. In 1997, the Xiphophorus OggSquish was described as "an attempt both to create a flexible compressed audio format for modern audio applications as well as to provide the first audio format that is common on any and every modern computer platform”. In 2000, two projects were in active development for planned release: Ogg Vorbis format and libvorbis - the reference implementation of Vorbis. In 2001, OggSquish has renamed Ogg and it was described as "the umbrella for a group of several related multimedia and signal processing projects".Ogg has come to stand for the file format, as part of the larger Xiph.org multimedia project. Squish became just the name of one of the Ogg codecs. In May 2003, two Internet RFCs were published relating to the format. The Ogg bitstream was defined in RFC 3533 (which is classified as 'informative') and its Internet content type (application/Ogg) in RFC 3534 (which is, as of 2006, a proposed standard protocol). In September 2008, RFC 3534 was obsoleted by RFC 5334, which added content types of video/Ogg, audio/Ogg and filename extensions. ogx, .ogv, .oga, .spx.

OGM

In 2002, the lack of formal video support in Ogg resulted in the creation of the OGM file format, a hack on Ogg that allowed embedding of video from the Microsoft DirectShow framework into an Ogg-based wrapper. Later, video (and subtitle) support was formally specified for Ogg but in a manner incompatible with OGM. Independently, the Matroska container format reached maturity and provided an alternative for people interested in combining Vorbis audio and arbitrary video codecs. As a result, OGM is no longer supported or developed and is formally discouraged by Xiph.org. Today, video in Ogg is found with the .ogv file extension, which is formally specified and officially supported. Software and codecs that support .ogm files are available without charge.

2006

Although Ogg had not reached anywhere near the ubiquity of the MPEG standards(e.g., MP3/MP4), as of 2006, it was commonly used to encode free content and had started to be supported by a significant minority of players. The more popular Vorbis codec had built-in support on many software players, and extensions were available for nearly all the rest.

2007

On May 16, 2007, the Free Software Foundation started a campaign to increase the use of Vorbis "as an ethically, legally and technically superior audio alternative to the proprietary MP3 format." People were also encouraged to support the campaign by adding a web button to their website or blog.

2009

By June 30, 2009, the Ogg container, through the use of the Theora and Vorbis, was the only container format included in Firefox 3.5 web browser's implementation of the HTML5 <video> and <audio> elements. This was under the original recommendation outlined in but later removed from, the HTML5 draft specification.

2010

On March 3, 2010, technical analysis by an FFmpeg developer was critical about the general-purpose abilities of Ogg as a multimedia container format. The creator of Ogg later responded to these claims in an article of his own.

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The information is provided by Tecquisition for general informational and educational purposes only and is not a substitute for professional legal advice. If you have any feedback, comments, requests for technical support or other inquiries, please mail us at tecqusition@gmail.com.