如果你习惯从在线商城下载 FLAC（自由无损音频压缩编码）格式的音频文件，请不要使用 Windows 10 系统的资源管理器来编辑元数据。在 Windows 10 Version 2004 及更高版本中存在一个错误，如果使用资源管理器修改元数据，就有可能会损坏 FLAC 音频文件。 这个 BUG 影响Windows10 专业版、家庭版、企业版、工作站和其他 SKU 版本。根据本月早些时候发布的支持文件，Windows 10的文件资源管理器的错误将破坏某些FLAC文件，这些文件在FLAC头之前包含一个ID3框架。ID3是一个框架，它负责存储信息，如音乐标题、艺术家、专辑、曲目编号等。 在 Windows 10 系统，FLAC处理程序忽略了ID3框架，因为它认为FLAC文件在开头使用4字节的fLaC。当音乐文件被用户编辑时，ID3 框架被覆盖了，没有开始代码。因此，音乐播放器无法识别修改后的文件。如果音乐文件的标题、艺术家或其他元数据在文件资源管理器中被改变，音乐文件就不会播放或加载。 幸运的是，微软已经确定了根本原因，现在可以通过Windows Update进行修复。在KB5003214更新的更新日志中，微软确认该错误已被修复，如果你改变了他们的标题、艺术家或其他元数据，自由无损音频编解码器（FLAC）音乐文件将不再变得无法播放。 对于那些有损坏的音乐文件，微软已经发布了一个新的PowerShell脚本，你可以运行它来使文件再次播放。然而，它不能恢复存储在ID3框架中的丢失的元数据。为了避免FLAC音乐文件在未来出现问题，微软建议应用本月的可选累积更新。 解决方案 1. 打开记事本 2. 将以下脚本代码复制到记事本中 # Copyright 2021 Microsoft # This script will repair a FLAC file that has been corrupted by Media Foundation in reference to KB5003430. # Refer to KB5003430 for further information param( [parameter(Mandatory =$ true, HelpMessage = "The path to the FLAC file that has been corrupted by Media Foundation", ValueFromRemainingArguments =$ true)] [ValidateScript({ -not [String]::IsNullOrEmpty( $_) -and (Test-Path $_) })] [String] $ File ) # We need to back up the current file incase we have any errors $ FileDirectory = Split-Path -Resolve $ File $ Filename = Split-Path -Leaf -Resolve $ File $ FullPath = Join-Path -Resolve $ FileDirectory $ Filename $ Filename = [String]::Format("Backup_{0:yyyyMMdd_hhmmss}_{1}", [DateTime]::Now, $ Filename) $ BackupLocation = Join-Path $ FileDirectory $ Filename Write-Output "Microsoft FLAC Repair Tool. This tool will repair a FLAC audio file that was corrupted when editing its details." Write-Output "Affected File: $ FullPath" Write-Output "A backup of the file will be made: $ BackupLocation" Write-Output "Do you wish to continue?" $ choice =$ host.ui.PromptForChoice("Fixing FLAC Script", "Do you wish to continue", ('&Yes', '&No'), 1) function ParseStreamInfoMetADATABlock([System.IO.FileStream] $ stream) { $ blockType = $ stream.ReadByte() $ lastBlock = ($ blockType -shr 7) -ne 0 $ blockType = $ blockType -band 0x7F if ($ blockType -ne 0) { return $ false } $ blockSize = (($ stream.ReadByte() -shl 16) -bor ($ stream.ReadByte() -shl 8) -bor $ stream.ReadByte()) if ($ blockSize -lt 34) { return $ false } $ minAudioBlockSize = ($ stream.ReadByte() -shl 8) -bor $ stream.ReadByte() $ maxAudioBlockSize = ($ stream.ReadByte() -shl 8) -bor $ stream.ReadByte() if ($ minAudioBlockSize -lt 16 -or $ maxAudioBlockSize -lt 16) { return $ false } $ minFrameSize = (($ stream.ReadByte() -shl 16) -bor ($ stream.ReadByte() -shl 8) -bor $ stream.ReadByte()) $ maxFrameSize = (($ stream.ReadByte() -shl 16) -bor ($ stream.ReadByte() -shl 8) -bor $ stream.ReadByte()) $ sampleInfo = (($ stream.ReadByte() -shl 24) -bor ($ stream.ReadByte() -shl 16) -bor ($ stream.ReadByte() -shl 8) -bor $ stream.ReadByte()) $ sampleRate = $ sampleInfo -shr 12 $ channelCount = (($ sampleInfo -shr 9) -band 0x7) + 1 $ bitsPerSample = (($ sampleInfo -shr 4) -band 0x1F) + 1 [UInt64] $ sampleCount = (($ stream.ReadByte() -shl 24) -bor ($ stream.ReadByte() -shl 16) -bor ($ stream.ReadByte() -shl 8) -bor $ stream.ReadByte()) $ sampleCount = (([UInt64] $ sampleInfo -band 0xF) -shl 32) -bor $ sampleCount $ MD5HashBytes = New-Object byte[] 16 $ stream.Read( $ MD5HashBytes, 0, $ MD5HashBytes.Length) $ MD5Hash = [Guid]( $ MD5HashBytes) if ($ sampleRate -eq 0) { return $ false } # Passing these checks means that we likely have a stream info header and can rebuild the file Write-Output "File Stream Information" Write-Output "Sample Rate: $ sampleRate" Write-Output "Audio Channels: $ channelCount" Write-Output "Sample Depth: $ bitsPerSample" Write-Output "MD5 Audio Sample Hash: $ MD5Hash" return $ true } if ($ choice -eq 0) { Copy-Item $ FullPath -Destination $ BackupLocation -Force $ stream = [System.IO.File]::Open( $ FullPath, [System.IO.FileMode]::Open) $ stream.Seek(4, [System.IO.SeekOrigin]::Begin) while ($ stream.ReadByte() -eq 0) {} # We now need to figure out where a valid FLAC metadata frame begins # We are likely pointing to the last byte of the size member so we'll seek back 4 bytes and retry $ flacDataStartPosition = $ stream.Position - 4 $ stream.Seek( $ flacDataStartPosition, [System.IO.SeekOrigin]::Begin) while (-not(ParseStreamInfoMetadataBlock( $ stream))) { $ flacDataStartPosition = $ flacDataStartPosition + 1 $ stream.Seek( $ flacDataStartPosition, [System.IO.SeekOrigin]::Begin) } # Insert the start code $ stream.Seek( $ flacDataStartPosition, [System.IO.SeekOrigin]::Begin) if (Test-Path "$ FullPath.tmp") { Remove-Item "$ FullPath.tmp" } $ fixedStream = [System.IO.File]::Open(" $ FullPath.tmp", [System.IO.FileMode]::CreateNew) [byte[]] $ startCode = [char[]]('f', 'L', 'a', 'C'); $ fixedStream.Write( $ startCode, 0, $ startCode.Length) $ stream.CopyTo( $ fixedStream) $ stream.Close() $ fixedStream.Close() Move-Item -Force "$ FullPath.tmp" $ FullPath } 3. 文件菜单上，点击保存。 4. 在 "另存为 "对话框中，找到你要保存PowerShell脚本的文件夹。 5. 在文件名框中，输入FixFlacFiles.ps1，将保存类型框改为文本文档（*.txt），然后点击保存。 6. 在Windows Explorer中，找到你保存的PowerShell脚本。 7. 右键单击该脚本，然后单击用PowerShell运行。 8. 当有提示时，输入无法播放的FLAC文件的文件名，然后按回车键。
