Common
WebM
Audiovisual media file format
WebM
WebM is an audiovisual media file format. It is primarily intended to offer a royalty-free alternative to use in HTML video and HTML audio elements. It has a sister project for images: WebP. The development of the format is sponsored by Google, and the corresponding software is distributed under a BSD license. WebM was a collaborative effort first released in 2010. The WebM container is based on a profile of Matroska. WebM initially supported VP8 video and Vorbis audio streams. In 2013, it was updated to accommodate VP9 video and Opus audio. It also supports the AV1 codec.
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