powershell check for ffmpeg then list all vid files in directory then prompt user to compress video

compress-video.ps1

# Check if FFmpeg is installed
$ffmpegInstalled = Get-Command ffmpeg -ErrorAction SilentlyContinue

if (-not $ffmpegInstalled) {
    Write-Host "FFmpeg is not installed or not found in PATH. Please install it before running this script."
    exit
}

# Get all video files in the current directory
$videoFiles = Get-ChildItem -Filter *.mp4

# Check if video files exist
if ($videoFiles.Count -eq 0) {
    Write-Host "No video files found in the current directory."
    exit
}

# Display video files to user
Write-Host "Select a video file to compress:"
for ($i = 0; $i -lt $videoFiles.Count; $i++) {
    Write-Host "$($i+1). $($videoFiles[$i].Name)"
}

# Get user selection
$selection = Read-Host "Enter the number of the file"
$selectedFile = $videoFiles[$selection - 1].FullName
$originalFileName = $videoFiles[$selection - 1].Name

# Prompt for compression percentage
$percentages = @("10", "25", "50")
Write-Host "Select a compression percentage:"
for ($i = 0; $i -lt $percentages.Count; $i++) {
    Write-Host "$($i+1). $($percentages[$i])%"
}

$compressionChoice = Read-Host "Enter the number of the percentage"
$compressionPercentage = [int]$percentages[$compressionChoice - 1]

# Define output file with prepended compression percentage
# Replace spaces with underscores in filename
$cleanFileName = $originalFileName -replace ' ', '_'
$outputFile = "$compressionPercentage`_$cleanFileName"

# Run FFmpeg compression command
$compressionFactor = (100 - $compressionPercentage) / 100.0
$ffmpegCommand = "ffmpeg -i `"$selectedFile`" -vcodec libx264 -crf $(30 * $compressionFactor) `"$outputFile`""

Invoke-Expression $ffmpegCommand

Write-Host "Compression completed! Output file saved as $outputFile"