Extension/DrawSubtitle.RoughDraft.Extension.ps1
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<# .Synopsis Draw subtitles on top of input video .Description Draw subtitles on top of input video using the libass library .EXAMPLE Convert-Media .Link https://ffmpeg.org/ffmpeg-filters.html#subtitles-1 .Link https://ffmpeg.org/ffmpeg-filters.html#ass #> [Management.Automation.Cmdlet("Convert","Media")] # It's an extension for Convert/Edit-Media [Management.Automation.Cmdlet("Edit","Media")] param( # Set the filename of the subtitle file to read. It must be specified. [Parameter(Mandatory)] [string] $SubtitleFile, # Specify the size of the original video, the video for which the ASS file was composed. [string] $OriginalVideoSize, # Set a directory path containing fonts that can be used by the filter. # These fonts will be used in addition to whatever the font provider uses. [string] $SubtitleFontDirectory, # Process alpha channel, by default alpha channel is untouched. [string] $SubtitleAlpha, # Set subtitles input character encoding. subtitles filter only. Only useful if not UTF-8. [string] $SubtitleCharacterEncoding, # Set subtitles stream index. subtitles filter only. [int] $SubtitleStreamIndex, # Override default style or script info parameters of the subtitles. # It accepts a string containing ASS style format KEY=VALUE couples separated by ",". [string] $SubtitleStyle ) $filterArgs =@( if ($SubtitleFile) { $resolvedSubtitleFile = $ExecutionContext.SessionState.Path.GetResolvedPSPathFromPSPath($SubtitleFile) "filename='$("$resolvedSubtitleFile".Replace('\', "'\\\\'").Replace("'","'\''").Replace(":", "'\\:'"))'" } if ($SubtitleFontDirectory) { "fontsdir='$($SubtitleFontDirectory.Replace('\', "'\\\\'").Replace("'","'\''").Replace(":", "'\\:'"))'" } if ($SubtitleAlpha) { "alpha=$SubtitleAlpha" } if ($SubtitleCharacterEncoding) { "charenc=$SubtitleCharacterEncoding" } if ($SubtitleStreamIndex) { "stream_index=$SubtitleStreamIndex" } if ($SubtitleStyle) { "force_style='$($subtitleStyle.Replace('\', "'\\\\'").Replace("'","'\''").Replace(":", "'\\:'"))'" } ) if ($SubtitleFile -like '*.ass') { $filterArgs = @($filterArgs -notlike 'charenc=*' -notlike 'stream_index=*') -join ':' "-vf" "ass=$filterArgs" } else { "-vf" "subtitles=$($filterArgs -join ':')" } |