Patent Issues
As an implementation of MPEG-4 Part 2, Xvid uses many patented technologies. For this reason, Xvid 0.9.x versions were not licensed in countries where these software patents are recognized. With the 1.0.x releases, a GNU GPL v2 license is used with no explicit geographical restriction. However, the legal usage of Xvid may still be restricted by local laws.
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—Henry David Thoreau (1817–1862)
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—Virginia Woolf (1882–1941)