This format was created for online broadcasting. Opus is an audio codec for compression used on the Internet in real-time mode. Employed by programs such as Skype and Mozilla. Mostly used in interactive applications. The advantages of Opus are high audio quality and good compression. It works only on devices powered by Windows. Opus files can be converted to similar extensions.

ogg

Ogg: the main file and streaming multimedia format

An open standardized format of the multimedia container type. Ogg is in the public domain and has no patent and license restrictions. Allows for playing and editing high-quality digital multimedia files. This format is not supported by devices powered by any Apple platform. An Ogg file can contain audio information and metadata. After compression, you can get files of different quality: medium or high. The compression process entails minimal loss.