ix Get-Frame.ps1 parameter forwarding to use preference variable splatting instead of manual array building, preventing positional binding issues, update Get-FramesRange.ps1 to add -y flag for automatic overwrite of existing PNG files, fix Create-ShortClip.ps1 to skip clearing default Frames directory when -Render is used (frames are input not output) and add null checks before Test-Path in cleanup logic, and update documentation in Create-FullSubtitle.ps1 and Create-ShortClip.ps1 to clarify existing

Create-FullSubtitle.ps1

@@ -7,6 +7,7 @@
 .DESCRIPTION
     This script creates a full subtitle file from a video file from three sources: a reference video and two SRT subtitle files.
     The output file contains all subtitles from the first and second subtitle files with proper timing and numbering.
+    An existing file at -Output is overwritten without a prompt. Its folder is created if it does not exist.
 .PARAMETER Video
     Path to the video file.
 .PARAMETER Subtitle1

Create-ShortClip.ps1

@@ -25,6 +25,10 @@
 .DESCRIPTION
     Creates a short clip video file from a 16:9 video file using the specified plan.
     See Create-ShortClip.ini for details about the INI format and supported entries for the plan file.
+    Existing files: with the default -Images (the 'Frames' folder next to the video), files directly in that folder are
+    deleted before extraction (not with -Render, where they are the input). With an explicit -Images, existing frames matching that pattern are deleted before extraction,
+    and the Frames folder is not touched. An existing output video is overwritten. The temporary extraction directory is
+    always removed. The Frames folder is removed after the video is created unless -Keep is given.
     Supports -WhatIf and -Confirm for safe execution.
 #>
 [CmdletBinding(SupportsShouldProcess)]
@@ -498,7 +502,7 @@ try {
         if ($videoDir -eq '') { $videoDir = '.' }
         $framesDir = Join-Path $videoDir 'Frames'
         if (Test-Path $framesDir) {
-            if ($PSCmdlet.ShouldProcess($framesDir, 'Clear existing frames directory')) {
+            if (-not $Render -and $PSCmdlet.ShouldProcess($framesDir, 'Clear existing frames directory')) {
                 Get-ChildItem -Path $framesDir -File | Remove-Item -Force
             }
         }
@@ -719,11 +723,11 @@ try {
     }
     
     # Clean up frames directory after video is successfully created
-    if ((-not $Keep) -and (Test-Path $framesDir) -and ($PSCmdlet.ShouldProcess($framesDir, 'Remove frames directory'))) {
+    if ((-not $Keep) -and $framesDir -and (Test-Path $framesDir) -and ($PSCmdlet.ShouldProcess($framesDir, 'Remove frames directory'))) {
         Remove-Item -Path $framesDir -Recurse -Force
         Write-Host "Frames directory removed: $framesDir"
     }
-    elseif ($Keep -and (Test-Path $framesDir)) {
+    elseif ($Keep -and $framesDir -and (Test-Path $framesDir)) {
         Write-Host "Frames directory preserved: $framesDir"
     }
 }

Get-Frame.ps1

@@ -1,7 +1,7 @@
 <#
 .SYNOPSIS
     Extracts a specific frame of a video file to a PNG image using Get-LastFrame.ps1, requiring -Video and -Frame parameters from that script.
-    The image filename used for the -Image parameter is automatically derived from the -Video filename, with a "-" followed by the "-Frame" value padded with zeros (maximum of 4 digits) inserted before the image file extension (e.g., P01.mp4 for frame 10 becomes P01-0010.png).
+    The image filename used for the -Image parameter is automatically derived from the -Video filename, with a "-" followed by the "-Frame" value padded with zeros (at least 4 digits, wider numbers are not truncated) inserted before the image file extension (e.g., P01.mp4 for frame 10 becomes P01-0010.png).
 .PARAMETER Video
     Path to the input video file. Can be absolute or relative to current directory.
 .PARAMETER Frame
@@ -73,9 +73,5 @@ $scriptDir          = Split-Path -Parent $MyInvocation.MyCommand.Path
 $getLastFrameScript = Join-Path $scriptDir 'Get-LastFrame.ps1'
 
 # Forward common parameters to Get-LastFrame.ps1
-$passThrough = @()
-if ($PSBoundParameters.ContainsKey('WhatIf'))  { $passThrough += '-WhatIf' }
-if ($PSBoundParameters.ContainsKey('Confirm')) { $passThrough += '-Confirm' }
-
-& $getLastFrameScript -Video $VideoPath -Image $imagePath -Frame $frameToExtract @passThrough
+& $getLastFrameScript -Video $VideoPath -Image $imagePath -Frame $frameToExtract -WhatIf:$WhatIfPreference -Confirm:([bool]$PSBoundParameters['Confirm'])
 exit $LASTEXITCODE

Get-FramesRange.ps1

@@ -15,6 +15,7 @@
     - all: Extract all frames (same as "0-%")
 .DESCRIPTION
     Extracts specific range of frames of a video file to PNG images using ffmpeg.
+    An existing PNG file with the same name is replaced.
     Supports -WhatIf and -Confirm for safe execution.
 #>
 [CmdletBinding(SupportsShouldProcess)]
@@ -135,6 +136,7 @@ for ($frameIndex = $startFrame; $frameIndex -le $endFrame; $frameIndex++) {
     $videoFilter = 'select=eq(n\,{0})' -f $frameIndex
 
     $ffmpegArgs = @(
+        '-y'
         '-i', $VideoPath
         '-vf', $videoFilter
         '-vsync', 'vfr'