31.4.0

Features

• Support partial-lossless rendering for H.264, HEVC, and VP9. Complete GOPs are copied without re-encoding, while fragments touching edit points are re-encoded. Use --no-partial-lossless to opt-out.
• Add support for WebCodecs-based H.264, HEVC, AV1, VP8, VP9, and AAC encoding for WebAssembly builds.
• Add --webcodecs to enable browser WebCodecs decoding in WebAssembly builds.
• Support the -- end-of-options separator in all subcommands.

Performance

• Speed up scaled video rendering by reusing a persistent scaling context.
• Reduce allocations and reuse media resources during rendering.

Fixes

• Fix first-time URL downloads failing when no cached download exists.
• Fix several minor decoder, container, and rendering resource leaks.
• Fix motion and audio analysis for media whose decoded frames lack presentation timestamps.
• Fix edit-expression token handling for apostrophes and missing values.

Misc.

• Unlicensed single-source rendering is supported through 3200×1800; higher resolutions require a license key.
• Unlicensed multi-source media can render up to SD instead of being rejected; multi-source timeline exports still require a license key.

Full Changelog: 31.3.2...31.4.0