What does ID3V2 mean?

In simple terms, ID3Tags refers to the label of an MP3 track. Specifically, ID3Tags can be explained simply by “ID3”. “ID3” means "and is usually located in the beginning or end of a mp3 file within a few bytes, with information about the mp3 singer, title, album name, age, style, etc., the information is called ID3 information, ID3 information is divided into two versions, v1 and v2. ” Where: v1 version of ID3 is 128 bytes at the end of the mp3 file, starting with three characters of TAG, followed by song information. The v2 version is generally located at the beginning of mp3 and can store large amounts of information such as lyrics, pictures of the album, and so on. And “Tag” in English, the meaning of a noun is "label”, so “ID3Tags” is the meaning of "MP3 file track label". Some places use the abbreviation “ID3”” to mean “ID3Tags”, which is essentially the same.

If there is no ID3, then one can only judge based on the file name of a song what it is, not to mention even hear what the song is, it's artist, album name you may not be back Get it down, so adding a built-in tag to an MP3 file is a matter of course. Interestingly, the MP3 tag does not have an ISO international standard. The various versions of ID3 are currently only a near-de facto standard, and no one has forced the player or encoding program to support it.

Contents and Differences of ID3v1 and ID3v2 ID3v1 & ID3v1.1 The MP3 format standard does not specifically define the structure for saving track-related information. So in 1996, a solution was proposed, that is, at the end of the mp3 file. Add some extra data (128 bytes) to save the title, singer, album name and other information, this is ID3 (v1). The field name of ID3v1 and the size of each field are fixed as shown below. Song title?D?D30 characters Artist?D?D30 characters Album?D?D30 characters Year?D?D4 characters Comment?D? D30 characters Genre?D?D byte ID3v1.1 and ID3v1 The only difference is that there is an additional Album track field. In fact, two bytes are extracted from the end of the Comment field to store the Album track information. ID3v1 (v1.1) everyone must be very familiar, because MP3 has been widely used ID3, and even many people mistakenly believe that this is the standard that comes with mp3 (in fact, mp3 format standard does not contain ID3). Although widely used, ID3v1 and ID3v1.1 have obvious defects. Field names and field lengths are fixed, non-extensible, and inflexible. And 30 characters are very limited, I think many people have encountered the title or the artist is too long to be cut off. So someone proposed a new ID3v2 format, trying to solve these problems and extending the functionality of ID3. ID3v2 Although ID3v2 seems to be just an upgrade of ID3v1 from the name, ID3v2 and ID3v1 are completely different in the format definition, and ID3v2 should be considered a brand new tag system. If you have used WINAMP's ID3 tag editor, you know that the most intuitive difference between ID3v2 and ID3v1 is the addition of some text fields, such as composer, conductor, media type, copyright message, and so on. But this is not the point. Compared to ID3v1, ID3v2's biggest improvement should be greatly enhanced flexibility and scalability, not only the length of each field is extensible (again, it is not necessary to limit the ID3v1 30 characters) And troubles), and users can easily add custom fields.