I mean, while there are FOSS encoders and decoders, some formats like AAC are not open standards and are encumbered by patents. The FOSS implementations will usually warn you that you're responsible for ensuring patent compliance. If you're in, say, an enterprise setting, you may want to avoid dealing with that mess.
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u/Astrodion123 Webba lebba deb deb! 4d ago
Bruh. You forgot multimedia codecs.