使用ffmpeg的频谱图生成功能，对指定目录下的指定类型文件批量生成的Powershell脚本

spectrumpic.ps1

$scan_types = @('.mp3', '.flac')
$scan_path = '.'
$pic_save_path = '.\spectrumpic'

[Console]::OutputEncoding = [System.Text.Encoding]::UTF8
[Console]::InputEncoding = [System.Text.Encoding]::UTF8
$OutputEncoding = [System.Text.Encoding]::UTF8

function Get-FilesOfType {
    param (
        [string]$path,
        [string[]]$types
    )
    Get-ChildItem -Path $path -File -Depth 0 |
    Where-Object { $_.Extension -in $types } |
    ForEach-Object { $_.FullName }
}

function Main {
    # 检查 pic_save_path 是否存在，不存在则新建对应目录
    if (-not (Test-Path -Path $pic_save_path)) {
        New-Item -Path $pic_save_path -ItemType Directory | Out-Null
    }

    $log_file = Join-Path -Path $pic_save_path -ChildPath 'process.log' # 日志
    $files = Get-FilesOfType -path $scan_path -types $scan_types
    foreach ($file_path in $files) {
        $file_name = Split-Path -Leaf $file_path
        Write-Host "Processing: $file_name"

        # 调用外部命令
        Invoke-Expression "ffmpeg -y -i `"$file_path`" -lavfi showspectrumpic=s=1200x600:mode=combined:color=intensity `"$pic_save_path\$file_name.png`" 2>&1 | Tee-Object -FilePath $log_file -Append"
    }
}

Main