Opus is a totally open, royalty-free, highly versatile audio codec. Developed by IETF codec working group
License: Open Source
Matroska is a versatile multimedia container format designed for video and audio, offering extensive support for various types of media, while Opus is a specialized audio codec tailored for high-efficiency audio compression and low latency. Matroska is ideal for complex media needs, whereas Opus excels in situations requiring real-time audio streaming and high-quality sound at low bit rates.