![]() ![]() Now, this might seem redundant at first, but the reason for this is so that if the file is uploaded to the web, audio players will know the length of the MP3 before it is finished downloading, meaning the media player knows what percentage of the song has downloaded, and can show an accurately long seek bar while the file is still streaming you can know the song's length before you have the entire song and can check the length yourself. This is what you were seeing when you used Mp3Tag. ![]() Not all MP3s have this, but most do, and the ID3 Tags are created by the software which created the MP3. For example, if I have a song one minute long, there is a bit of text, usually at the very beginning of the file, which says its length is a minute long. Why does it happen? Often, audio or video files will have an ID3 Tag containing their length.
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