Public/System/Optimize-Gif.ps1
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function Optimize-Gif { [CmdletBinding()] [CmdLetTag()] param ( [parameter(ValueFromPipeline,Mandatory)] [System.IO.FileInfo]$Gif, [int]$frameRate=7, [int]$Scale=-1 ) begin { $PSCmdlet|Write-PSCmdLetBegin install-npmpackage gifsicle } process { $palette="$env:TEMP\palette.png" $filters="fps=$FrameRate,scale=$Scale`:-1:flags=lanczos" Invoke-Script{ffmpeg -v warning -i $Gif.FullName -vf "$filters,palettegen=stats_mode=diff" -y $palette} $ffmpegOutput="$($Gif.DirectoryName)\$($Gif.BaseName)_ffmpeg$($Gif.Extension)" Invoke-Script{ffmpeg -v warning -i $Gif.FullName -i $palette -lavfi "$filters,paletteuse=dither=bayer:bayer_scale=5:diff_mode=rectangle" -y $ffmpegOutput} $gifsicleOutput="$($Gif.DirectoryName)\$($Gif.BaseName)_optimized$($Gif.Extension)" Invoke-Script{gifsicle -O3 $ffmpegOutput -o $gifsicleOutput} Get-Item $gifsicleOutput } end { } } |