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Convert VTT files to SRT format
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| <# | |
| .SYNOPSIS | |
| Fast conversion of Microsoft Stream VTT subtitle file to SRT format. | |
| .DESCRIPTION | |
| Uses select-string instead of get-content to improve speed 2 magnitudes. | |
| .PARAMETER Path | |
| Specifies the path to the VTT text file (mandatory). | |
| .PARAMETER OutFile | |
| Specifies the path to the output SRT text file (defaults to input file with .srt). | |
| .EXAMPLE | |
| ConvertTo-SRT -Path .\caption.vtt | |
| .EXAMPLE | |
| ConvertTo-SRT -Path .\caption.vtt -OutFile .\SRT\caption.srt | |
| .EXAMPLE | |
| Get-Item caption*.vtt | ConvertTo-SRT | |
| .EXAMPLE | |
| ConvertTo-SRT -Path ('.\caption.vtt','.\caption.vtt','.\caption3.vtt') | |
| .EXAMPLE | |
| ('.\caption.vtt','.\caption2.vtt','.\caption3.vtt') | ConvertTo-SRT | |
| .NOTES | |
| Inspiration from: https://gist.github.com/brianonn/455bce106bd86c9587d223acfbbe9751/ | |
| Takes a 3.5 minute process for 17K row VTT to 3.5 seconds | |
| https://github.com/joegasper | |
| https://gist.github.com/joegasper/e862f71b5a2658fae21fd36f7231b33c | |
| #> | |
| function ConvertTo-SRT { | |
| [CmdletBinding()] | |
| param ( | |
| [Parameter(Mandatory = $true, | |
| Position = 0, | |
| ValueFromPipeline, | |
| ValueFromPipelineByPropertyName = $true, | |
| HelpMessage = "Path to VTT file.")] | |
| [Alias("PSPath")] | |
| [ValidateNotNullOrEmpty()] | |
| [Object[]]$Path, | |
| [Parameter(Mandatory = $false, | |
| Position = 1, | |
| ValueFromPipelineByPropertyName = $true, | |
| HelpMessage = "Path to output SRT file.")] | |
| [string]$OutFile | |
| ) | |
| process { | |
| foreach ($File in $Path) { | |
| $Lines = @() | |
| if ( $File.FullName ) { | |
| $VTTFile = $File.FullName | |
| } | |
| else { | |
| $VTTFile = $File | |
| } | |
| if ( -not($PSBoundParameters.ContainsKey('OutFile')) ) { | |
| $OutFile = $VTTFile -replace '(\.vtt$|\.txt$)', '.srt' | |
| if ( $OutFile.split('.')[-1] -ne 'srt' ) { | |
| $OutFile = $OutFile + '.srt' | |
| } | |
| } | |
| New-Item -Path $OutFile -ItemType File -Force | Out-Null | |
| $Subtitles = Select-String -Path $VTTFile -Pattern '(^|\s)(\d\d):(\d\d):(\d\d)\.(\d{1,3})' -Context 0, 2 | |
| for ($i = 0; $i -lt $Subtitles.count; $i++) { | |
| $Lines += $i + 1 | |
| $Lines += $Subtitles[$i].line -replace '\.', ',' | |
| $Lines += $Subtitles[$i].Context.DisplayPostContext | |
| $Lines += '' | |
| } | |
| $Lines | Out-File -FilePath $OutFile -Append -Force | |
| } | |
| } | |
| } |
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Awesome! I whipped that up one night for a single effort I needed and glad to see you could take it to the next step.