Opus Interactive Audio Codec Overview. Opus is a totally open, royalty-free, highly versatile audio codec. Opus is unmatched for interactive speech and music transmission over the Internet, but is also intended for storage and streaming applications.

Apr 12, 2024 · Opus-tools provides command-line utilities to encode, inspect, and decode .opus files. Opus 1.5.2 fixes several build issues that were discovered since the 1.5 release. It also fixes a misalignment issue in the AVX2 code that could cause crashes under Windows.

Opus supports constant and variable bitrate encoding from 6 kbit /s to 510 kbit/s (or up to 256 kbit/s per channel for multi-channel tracks), frame sizes from 2.5 ms to 60 ms, and five sampling rates from 8 kHz (with 4 kHz bandwidth) to 48 kHz (with …

May 17, 2012 · Perform a CTL function on an Opus encoder. Generally the request and subsequent arguments are generated by a convenience macro. See also: Encoder related CTLs

In Opus 1.5, we added a deep learning based redundancy encoder that enhances audio in lossy networks by embedding one second of recovery data in the padding data of each packet. The underlying algorithm behind encoding and decoding the recovery data is called the deep redundancy (DRED) algorithm.

You should be able to just pass the audio buffer directly to / from opus and reinterpret its pointer to the needed type inline, without having to manually do bit manipulations to convert and copy between different buffers.

Dec 8, 2012 · The Opus audio codec looks like the best codec so far for compressing audio. It has recently become supported in the latest ffmpeg and VLC players. However, there is no documentation I can find on how to actually encode media with it.

A javascript library to encode and decode Opus (with/without Ogg container) using pure JavaScript and/or WebAssembly. Main differences to chris-rudmin/opus-recorder: make examples/ work out-of-the-box again (work-around: copy recorder.js, decoderWorker.js and encoderWorker.js to dist/ and/or modified <script src="..." tags in exmple HTML files)

Jan 9, 2024 · Execute a CTL function to an Opus encoder. This section describes the procedures and functions used to encode Opus. Since Opus is a stateful codec, the encoding process begins by creating an encoder state, which is done as follows: Copy the code. From this point, ENC can be used to encode audio streams.

encoderBitRate - (optional) Target bitrate in bits/sec. The encoder selects an application-specific default when this is not specified. encoderComplexity - (optional) Value between 0 and 10 which determines latency and processing for encoding. 0 is fastest with lowest complexity. 10 is slowest with highest complexity.