FFmpeg 9.0 'Lei' ships, four months after the 8.1 release

The FFmpeg project has tagged version 9.0, codenamed ‘Lei,’ roughly four months after 8.1. The major-version bump lands the ubiquitous open-source multimedia framework — the libavcodec/libavformat/libavfilter stack that underpins media handling in everything from VLC and browsers to cloud transcoding pipelines and countless embedded devices. The published RELEASE_NOTES are deliberately thin: they announce the release and codename and defer the detailed rundown of new features, codecs, filters, and API/ABI changes to the project’s Changelog and git history.

Because a leading ‘9.0’ signals a new major series, downstream maintainers should expect API/ABI shifts and potential deprecations that warrant checking the Changelog before upgrading pinned builds. FFmpeg’s reach makes any release broadly consequential from a supply-chain standpoint — it sits deep in the dependency tree of a huge share of software that touches audio or video, so version transitions ripple out to packagers, distros, and any product that links its libraries.

For teams tracking dependencies, the practical takeaways are to review the full Changelog for the concrete codec/filter additions and removals, watch for behavior or ABI changes when relinking, and monitor for the point releases and security fixes that typically follow a new major line.