┌─ FILE ANALYSIS ──────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────── ┐
│ DEVELOPER : IETF (Internet Engineering Task Force)
│ CATEGORY : Audio
│ MIME TYPE : audio/opus
│ MAGIC BYTES : 4F676753
└ ──────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────── ┘
What is an Opus file?
Opus is an open, royalty-free audio codec standardized by the IETF as RFC 6716. It is designed for interactive speech and music transmission over the Internet, delivering superior quality at low bitrates. Opus is the default codec for WebRTC voice and video calls, Discord, and many VoIP applications.
How to open Opus files
- VLC Media Player (Windows, macOS, Linux) — Free, open-source
- foobar2000 (Windows) — Audiophile player
- MPV (Windows, macOS, Linux) — Lightweight
- Web browsers — Native playback via HTML5 audio
Technical specifications
| Property | Value |
|---|---|
| Codec | Opus (RFC 6716) |
| Container | Ogg (.opus) or WebM |
| Sample Rates | 8-48 kHz |
| Bit Rate | 6-510 kbps |
| Channels | Up to 255 |
| Latency | 5-66.5 ms |
Common use cases
- VoIP: Discord, WhatsApp, Signal voice calls.
- WebRTC: Real-time browser communication.
- Streaming: Low-latency audio streaming.
- Audiobooks: Efficient compression for spoken word.