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MP3 is a Container or Codec alone
cernall
post Jul 2 2010, 09:14
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We can se files with MP# extension. Is MP3 a container also, or it is a codec alone?

If its a codec alone, then how can we play and have some meta information in the mp3 files?
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spoon
post Jul 2 2010, 20:50
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I think the definition of a container (m4a, wav, aiff, etc) is that it should be able to contain different audio formats. Mp3 (if you ignore the mp3 surround distraction), only holds mp3.


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Aleron Ives
post Jul 2 2010, 21:21
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QUOTE (spoon @ Jul 2 2010, 12:50) *
I think the definition of a container (m4a, wav, aiff, etc) is that it should be able to contain different audio formats. Mp3 (if you ignore the mp3 surround distraction), only holds mp3.

Yeah, the naming convention isn't consistant, which is rather confusing to people. MP3 is just a codec, because a file with the .mp3 extension is always MP3 audio. The successor to MP3 is AAC, and files with the .aac extension are "raw" AAC audio the same way MP3 audio is always presented. Unfortunately, AAC is often stored in MP4, which is a container, not a codec. MP4 can hold AAC audio, AVC video, or both, but MP4 itself is not content. It always has to hold something else, which is what makes it a container. (MP4 can also hold MP3 audio, XviD or DivX video, and any other number of formats. AVC/AAC are just the most common contents of MP4 containers.)
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