27.0.0

Major

• Deprecate --keep-tracks-separate, it's behavior is now the default. Use --mix-audio-streams for the old behavior.
• Remove deprecated "copy" codec (auto-editor never does remuxing).
• Require NumPy >= 2.
• Switch from PyAV to BasswoodAV

Features

• Make video rendering 11% faster, rendering should be 19% faster overall.

Full Changelog: 26.3.3...27.0.0