xiph/opus

Health v2 · maintenance only

Flags: no_license

Adoption not part of the score

3293 stars · 800 forks observed · 2026-08-28

What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-30, confidence not recorded

libopus is the reference implementation of the Opus audio codec, an IETF-standardized (RFC 6716) royalty-free codec for interactive speech and music over the Internet. It scales from low-bitrate narrowband speech to high-quality stereo music with very low latency, and version 1.5+ adds deep-learning-based packet loss recovery (DRED).

Use cases

• encode and decode audio for voice over IP calls
• low-latency audio for videoconferencing
• in-game voice chat compression
• streaming music over the internet
• compress audio files to opus format
• real-time audio transmission over lossy networks
• embed an audio codec in a C application

When to choose

• you need low-latency interactive speech or music transmission
• you want a royalty-free, open standard codec
• you need to scale quality from 6 kb/s speech to 510 kb/s stereo music
• you need robustness against packet loss in real-time communication

When to avoid

• you need lossless audio compression
• you only need simple file conversion without writing C code (use opus-tools instead)
• you need video compression

Facets

library · maturity stable

audio-processing compression machine-learning media speech-processing cross-platform c cpp embedded windows audio-codec voip speech rfc-6716 royalty-free low-latency streaming audio real-time linux macos

Member repositories

For agents

markdown · JSON · MCP: product_card(name="xiph/opus")