FSF: Getting started with Ogg and installing Ogg plugins

"...Ogg is professional-grade media format. Ogg Vorbis encodes audio and Ogg Theora encodes video. [...] The companies that control the software design it to restrict the users and spy on them. If you choose Ogg Vorbis and Ogg Theora, you can listen to audio and stream video using many different media players, including free software that respects your freedom..."

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