About WebM Format
WebM is a multimedia container format designed to provide a royalty-free, high-quality open video compression format for use with HTML5 video. The project’s development is sponsored by Google. A WebM file consists of VP8 video and Vorbis audio streams, in a container based on a profile of Matroska. The project releases WebM related software under a BSD license and all users are granted a worldwide, non-exclusive, no-charge, royalty-free patent license. The purpose of the container is to hold the video and audio streams so they can be synched for playback. The container is comparable to a QuickTime or MPEG4 file.
What is the VP8 video codec?
VP8 is a highly efficient video compression technology that was developed by On2 Technologies. Google acquired On2 in February, 2010. For more information, see the “VP8 Video Codec” section below.
What is the Vorbis audio codec?
Vorbis is an open-source audio compression technology. It is an independent project of the Xiph Foundation. For more information about Vorbis, please visit www.vorbis.org.
A valid WebM file can only contain VP8 video and Vorbis audio in a .webm container.
Native WebM support by Mozilla Firefox 4, Opera 10.6, and Google Chrome was announced at the 2010 Google I/O conference. However, not every web browser natively supports WebM. Media players such as VLC, Miro, and Winamp, have announced support. MPlayer has native support for playing WebM files.
YouTube now offers WebM videos as part of its HTML5 player experiment. All uploaded files with resolutions from 720p and above are encoded to WebM in 480p and 720p, and other resolutions will follow. YouTube has committed to encode their entire portfolio of videos to WebM. Sorenson Media’s online encoding platform now supports VP8 and WebM. Skype has implemented the VP8 codec into the Skype 5.0 software. Logitech is planning to use WebM as part of a video calling service. NVIDIA announced 3D video support for WebM through HTML5 and their NVIDIA 3D Vision technology.
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