New version of FFmpeg codenamed "Works with HTML5" is released. It is first version that supports Google's newly released libvpx library for the VP8 codec and the Matroska demuxer was extended to support to WebM container.
WebM is an open, royalty-free, media file format designed for the web. WebM defines the file container structure, video and audio formats. WebM files consist of video streams compressed with the VP8 video codec and audio streams compressed with the Vorbis audio codec. The WebM file structure is based on the Matroska container.