朋友由于抠门 SD 卡买小了，结果音乐太多放不下，又不舍得再买新卡，不得已决定重新转码，把音乐码率压低一点，牺牲点音质来换空间（用某些人的话说，反正不是搞音乐的，听不出差别）…
结果千千静听（百度音乐）转码后会把音乐 ID3 信息里的标题当文件名…（PS:怀念当年的 千千静听…）
结果成了这个模样：
由于数量较多，收工改会死人的..
所以只好想办法用程序来批量改
找到了园友的老文章：http://www.cnblogs.com/TianFang/archive/2009/09/27/1574722.html
于是决定用 Windows API Code Pack
不过 MS 网站已经木有 Windows API Code Pack 的链接了
不过找起来也不麻烦
找到后新建工程，添加引用这两个 dll 就可以了
然后在工程里新建类 MediaTags，写入内容如下 ：
class="alt"> class MediaTags
{
#region Mp3文件属性
/// <summary>
/// 标题
/// </summary>
[MediaProperty("Title")]
public string Title { get; set; }
/// <summary>
/// 子标题
/// </summary>
[MediaProperty("Media.SubTitle")]
public string SubTitle { get; set; }
/// <summary>
/// 星级
/// </summary>
[MediaProperty("Rating")]
public uint? Rating { get; set; }
/// <summary>
/// 备注
/// </summary>
[MediaProperty("Comment")]
public string Comment { get; set; }
/// <summary>
/// 艺术家
/// </summary>
[MediaProperty("Author")]
public string Author { get; set; }
/// <summary>
/// 唱片集
/// </summary>
[MediaProperty("Music.AlbumTitle")]
public string AlbumTitle { get; set; }
/// <summary>
/// 唱片集艺术家
/// </summary>
[MediaProperty("Music.AlbumArtist")]
public string AlbumArtist { get; set; }
/// <summary>
/// 年
/// </summary>
[MediaProperty("Media.Year")]
public uint? Year { get; set; }
/// <summary>
/// 流派
/// </summary>
[MediaProperty("Music.Genre")]
public string Genre { get; set; }
/// <summary>
/// #
/// </summary>
[MediaProperty("Music.TrackNumber")]
public uint? TrackNumber { get; set; }
/// <summary>
/// 播放时间
/// </summary>
[MediaProperty("Media.Duration")]
public string Duration { get; private set; }
/// <summary>
/// 比特率
/// </summary>
[MediaProperty("Audio.EncodingBitrate")]
public string BitRate { get; private set; }
#endregion
public MediaTags(string mediaPath)
{
//var obj = ShellObject.FromParsingName(mp3Path); //缩略图，只读
//obj.Thumbnail.Bitmap.Save(@"R:\2.jpg");
Init(mediaPath);
}
void Init(string mediaPath)
{
using (var obj = ShellObject.FromParsingName(mediaPath))
{
var mediaInfo = obj.Properties;
foreach (var properItem in this.GetType().GetProperties())
{
var mp3Att = properItem.GetCustomAttributes(typeof(MediaPropertyAttribute), false).FirstOrDefault();
var shellProper = mediaInfo.GetProperty("System." + mp3Att);
var value = shellProper == null ? null : shellProper.ValueAsObject;
if (value == null)
{
continue;
}
if (shellProper.ValueType == typeof(string[])) //艺术家，流派等多值属性
{
properItem.SetValue(this, string.Join(";", value as string[]), null);
}
else if (properItem.PropertyType != shellProper.ValueType) //一些只读属性，类型不是string，但作为string输出，避免转换 如播放时间，比特率等
{
properItem.SetValue(this, value == null ? "" : shellProper.FormatForDisplay(PropertyDescriptionFormatOptions.None), null);
}
else
{
properItem.SetValue(this, value, null);
}
}
}
}
public void Commit(string mp3Path)
{
var old = new MediaTags(mp3Path);
using (var obj = ShellObject.FromParsingName(mp3Path))
{
var mediaInfo = obj.Properties;
foreach (var proper in this.GetType().GetProperties())
{
var oldValue = proper.GetValue(old, null);
var newValue = proper.GetValue(this, null);
if (oldValue == null && newValue == null)
{
continue;
}
if (oldValue == null || !oldValue.Equals(newValue))
{
var mp3Att = proper.GetCustomAttributes(typeof(MediaPropertyAttribute), false).FirstOrDefault();
var shellProper = mediaInfo.GetProperty("System." + mp3Att);
Console.WriteLine(mp3Att);
SetPropertyValue(shellProper, newValue);
}
}
}
}
#region SetPropertyValue
static void SetPropertyValue(IShellProperty prop, object value)
{
if (prop.ValueType == typeof(string[])) //只读属性不会改变，故与实际类型不符的只有string[]这一种
{
string[] values = (value as string).Split(new char[] { ';' }, StringSplitOptions.RemoveEmptyEntries);
(prop as ShellProperty<string[]>).Value = values;
}
if (prop.ValueType == typeof(string))
{
(prop as ShellProperty<string>).Value = value as string;
}
else if (prop.ValueType == typeof(ushort?))
{
(prop as ShellProperty<ushort?>).Value = value as ushort?;
}
else if (prop.ValueType == typeof(short?))
{
(prop as ShellProperty<short?>).Value = value as short?;
}
else if (prop.ValueType == typeof(uint?))
{
(prop as ShellProperty<uint?>).Value = value as uint?;
}
else if (prop.ValueType == typeof(int?))
{
(prop as ShellProperty<int?>).Value = value as int?;
}
else if (prop.ValueType == typeof(ulong?))
{
(prop as ShellProperty<ulong?>).Value = value as ulong?;
}
else if (prop.ValueType == typeof(long?))
{
(prop as ShellProperty<long?>).Value = value as long?;
}
else if (prop.ValueType == typeof(DateTime?))
{
(prop as ShellProperty<DateTime?>).Value = value as DateTime?;
}
else if (prop.ValueType == typeof(double?))
{
(prop as ShellProperty<double?>).Value = value as double?;
}
}
#endregion
#region MediaPropertyAttribute
[AttributeUsage(AttributeTargets.Property, Inherited = false, AllowMultiple = true)]
sealed class MediaPropertyAttribute : Attribute
{
public string PropertyKey { get; private set; }
public MediaPropertyAttribute(string propertyKey)
{
this.PropertyKey = propertyKey;
}
public override string ToString()
{
return PropertyKey;
}
}
#endregion
}
剩下的就很简单了
读取当前文件夹下的所有mp3，批量替换标题
static void Main(string[] args) { string fileDirectory = System.IO.Directory.GetCurrentDirectory(); DirectoryInfo folder = new DirectoryInfo(fileDirectory); foreach (FileInfo file in folder.GetFiles("*.mp3")) { MediaTags mt = new MediaTags(file.FullName); mt.Title = file.FullName.Replace(fileDirectory + "\\", "").Replace(".mp3", ""); mt.Commit(file.FullName); } }
完成效果，剩下批量转换就可以了
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