… for Codecs & Media

Tip #453: What is WebM?

WebM is supported by Mozilla, Firefox, Opera and Google Chrome.

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Developed and owned by Google, WebM is an audiovisual media file format. It is primarily intended to offer a royalty-free alternative to use in the HTML5 video and the HTML5 audio elements. It has a sister project WebP for images. The development of the format is sponsored by Google, and the corresponding software is distributed under a BSD license. There is some dispute, however, if WebM is truly royalty-free.

According to Wikipedia, native WebM support by Mozilla Firefox, Opera, and Google Chrome was announced at the 2010 Google I/O conference. Internet Explorer 9 requires third-party WebM software. Safari for macOS which relied on QuickTime to play web media until Safari 12, still does not have native support for WebM.

VLC media player, MPlayer, K-Multimedia Player and JRiver Media Center have native support for playing WebM files Android also supports WebM.

Here’s a link to learn more.


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