v1.52.0

amirivojdan/shekarv1.52.0Jul 30, 2026by Vanilagy

AI Summary

A major feature release introducing quantizer support for encoders and expanding the Quality class, while deprecating the bitrate API.

Key Highlights

Added quantizer support for constant-quality encoding
Expanded Quality class with bitrate and quantizer levels
Deprecated 'bitrate' fields across the API in favor of 'quality'

Breaking Changes

Deprecated 'bitrate' fields all across the API; use the new 'quality' field instead

New Features

Quantizer support for encoders
Expanded Quality class
Improved encoder error handling

Full Release Notes

- Added quantizer support for encoders, enabling constant-quality encoding. Quantizer mode is used automatically if you use subjective qualities; no code changes needed. (#448)
- Expanded the `Quality` class: Can now take in an arbitrary quality level, specify bitrate and bitrate mode, and specify a concrete per-codec quantizer level
- Adjusted `@mediabunny/server` to properly forward quantizer settings to libavcodec
- Deprecated `bitrate` fields all across the API; use the new `quality` field instead
- Fixed video/audio decoders not being closed in certain error situations (#446)
- Fixed promises hanging indefinitely sometimes when calling Input.dispose()
- Improved encoder error handling to reduce "Sample wasn't closed" warnings
- Fixed ISOBMFF muxer not labeling video tracks as containing an alpha track (for example, with ProRes 4444) (#450)