如何阅读Id3v2标签

Question

static void Main(string[] args)
{
    FileStream fs = File.Open(@"C:\Skrillex - Rock n' Roll (Will Take You to the Mountain).mp3", FileMode.Open);
    BinaryReader br = new BinaryReader(fs);

    byte[] tag = new byte[3];
    byte[] version = new byte[2];
    byte[] flags = new byte[1];
    byte[] size = new byte[4];
    byte[] frameId = new byte[4];
    byte[] frameSize = new byte[4];
    byte[] frameFlags = new byte[2];

    br.Read(tag, 0, tag.Length);
    br.Read(version, 0, version.Length);
    br.Read(flags, 0, flags.Length);
    br.Read(size, 0, size.Length);
    br.Read(frameId, 0, frameId.Length);
    br.Read(frameSize, 0, frameSize.Length);
    br.Read(frameFlags, 0, frameFlags.Length);

    ulong iSize = (ulong)frameSize[0] << 21 | (ulong)frameSize[1] << 14 | (ulong)frameSize[2] << 7 | (ulong)frameSize[3];
    Console.WriteLine("Frame Data Size : " + iSize.ToString());

    byte[] body = new byte[iSize];
    br.Read(body, 0, body.Length);
    Console.WriteLine(BitConverter.ToString(body));
    Console.WriteLine(ConvertHexToString(BitConverter.ToString(body)));

    br.Close();
}

public string ConvertHexToString(string HexValue)
{
    string StrValue = "";
    HexValue = HexValue.Replace("-", "");
    while (HexValue.Length > 0)
    {
        StrValue += Convert.ToChar(Convert.ToUInt32(HexValue.Substring(0, 2), 16)).ToString();
        HexValue = HexValue.Substring(2, HexValue.Length - 2);
    }
    return StrValue;
}

我正在编写用于读取没有外部库或Shell32的ID3v2.3标签的代码.

上面的代码是代码,但它似乎无法正常工作.

以下是我运行代码时的结果:

帧数据大小:91

01-FF-FE-52-00-6F-00-63-00-6B-00-20-00-6E-00-27-00-20-00-52-00-6F-00-6C-00- 6C-00-20-00-28-> 00-57-00-69-00-6C-00-6C-00-20-00-54-00-61-00-6B-00-65-00-20 -00-59-00-6F-00-75-00-20-00-74-> 00-6F-00-20-00-74-00-68-00-65-00-20-00-4D- 00-6F-00-75-00-6E-00-74-00-61-00-69-00-6E-00-29-00

ÿþR

它没有返回标签中记录的歌曲名称"Rock n'Roll(Will Take You to the Mountain)".

有什么问题？

Answer 1

开头的01表示它被编码为UTF-16(每个字符2个字节).接下来的两个字节FF FE是字节顺序标记,因此您可以判断是否将字节对解释为最重要的第一个或最不重要的第一个.之后,您将获得实际的文本数据.

0052 - R
006F - o
0063 - c
006B - k

等等