Merge Episodes that are in multiple parts into one

MasterMerge.ps1

# Path to the directory containing your MKV files
$inputDirectory = "F:\MasterChichi\MasterChef3"
$outputDirectory = "F:\MasterChichi\MasterMergedCu"
$tempDirectory = "F:\MasterChichi\MasterTemp"

if (-not (Test-Path -Path $outputDirectory)) {
    New-Item -ItemType Directory -Path $outputDirectory
}
if (-not (Test-Path -Path $tempDirectory)) {
    New-Item -ItemType Directory -Path $tempDirectory
}

# Get all MKV files in the input directory
$files = Get-ChildItem -Path $inputDirectory -Filter "*.mkv"

# Group files by episode
$groupedFiles = $files | Group-Object {
    $_.BaseName -replace " - \d+⧸\d+.*$", ""
}

# Process each episode group
foreach ($group in $groupedFiles) {
    $shouldFail = $false
    $episodeName = $group.Name
    $episodeFiles = $group.Group | Sort-Object Name

    # Trim each part
    $trimmedFiles = @()
    foreach ($file in $episodeFiles) {
        $codec = ffprobe -v error -select_streams v:0 -show_entries stream=codec_name -of default=nw=1:nk=1 $file.FullName

        $trimmedFile = Join-Path $tempDirectory $file.Name

        if ($codec -eq "av1") {
            ffmpeg -ss 00:00:06.100 -i $file.FullName -c copy $trimmedFile
            $trimmedFiles += $trimmedFile
        } else {
          Write-Host "$file.FullName is not AV1 encoded, this episode will be skipped..."
          $shouldFail = $true
        }
    }

    if ($shouldFail) {
        # Clean up the temporary trimmed files
        Remove-Item -Path $trimmedFiles -Force
        Remove-Item -Path $fileListPath -Force
        continue
    }

    # Create a temporary text file for FFmpeg
    $fileListPath = Join-Path $tempDirectory "file_list.txt"
    $fileListContent = $trimmedFiles | ForEach-Object {
        "file '$($_)'`n"
    }

    $fileListContent | Set-Content -Path $fileListPath -NoNewline -Encoding utf8NoBOM

    $outputFile = Join-Path $outputDirectory "$episodeName.mkv"

    Write-Host "$outputFile"

    # Merge the files using FFmpeg
    ffmpeg -f concat -safe 0 -i $fileListPath -c copy -map_metadata 0 $outputFile

    # Clean up the temporary trimmed files
    Remove-Item -Path $trimmedFiles -Force
    Remove-Item -Path $fileListPath -Force
}

Write-Host "Merging complete. Check the output directory: $outputDirectory"
Remove-Item -Path $tempDirectory -Recurse -Force