Trim video without re-encode

trimvideo.ps1

function Download-FFmpeg {
    # Download FFmpeg from the official website
    $url = "https://ffmpeg.org/releases/ffmpeg-latest-win64-static.zip"
    $output = "$env:TEMP\ffmpeg.zip"
    Invoke-WebRequest -Uri $url -OutFile $output
    
    # Extract the files
    Expand-Archive -Path $output -DestinationPath $env:TEMP
    
    # Add FFmpeg to the system PATH
    $env:PATH = "$env:TEMP\ffmpeg-*-static\bin;$env:PATH"
}

# Check if FFmpeg is installed
if (-not (Test-Path -Path "$env:TEMP\ffmpeg-*-static\bin\ffmpeg.exe")) {
    if(-not ([Security.Principal.WindowsPrincipal] [Security.Principal.WindowsIdentity]::GetCurrent()).IsInRole([Security.Principal.WindowsBuiltInRole] "Administrator"))
    {
        Write-Host "FFmpeg is not installed. Please re-run the script as an administrator to download and install FFmpeg."
        break
    }
    else
    {
        Download-FFmpeg
    }
}

# Get the input file
$file = Read-Host "Enter the original file name or drag and drop the file here:"

# Get the start and end times
$start = Read-Host "Enter the start time of the video in hh:mm:ss or mm:ss format"
$end = Read-Host "Enter the end time of the video in hh:mm:ss or mm:ss format"

# Create the output file name
$output = "$($file.BaseName)-trimmed$($file.Extension)"

# Trim the video
Start-Process -FilePath ffmpeg -ArgumentList "-i `"$file`" -ss $start -to $end -c copy -copyts -avoid_negative_ts 1 -progress - -y `"$output`"" -NoNewWindow -Wait

# Print the output file name
Write-Host "Video trim complete. Output file: $output"