According to Wikipedia, a codec is a program that encodes and decodes a digital data stream. … If a codec is not installed, your video player won’t play the audio or the video. The default Android video player supports limited codecs, so many users get this warning while playing an unsupported file such as MKV.

What does an audio codec do?

An audio codec is a device or computer program capable of encoding or decoding a digital data stream (a codec) that encodes or decodes audio. … In hardware, audio codec refers to a single device that encodes analog audio as digital signals and decodes digital back into analog.

What is the function of audio codec in mobile?

An audio codec converts analog audio signals into digital signals for transmission or encodes them for storage. A receiving device converts the digital signals back to analog form using an audio decoder for playback.