M4A is a filename extension for AAC container format and is developed by Apple Inc. M4A music is bought on the iTunes Store and does not come with DRM protection. In terms of quality, M4A is better than MP3 because it is lossless but still compressed. This means that it occupies less storage space and doesn’t lose quality over time.
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MPEG-2 is a digital video coding format introduced in 1995 and later revised in 2013. It uses lossy video and audio data compressions and is very popular among video hardware, thanks to its low computational complexity. It is also widely used in cable and satellite broadcasting as well as writing DVDs.
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