FFmpeg: convert video to animated .gif (PowerShell script)

ffmpeg_vid2gif.ps1

# convert video to animated .gif

# requires FFmpeg 2.6 or higher
# http://blog.pkh.me/p/21-high-quality-gif-with-ffmpeg.html

param(
  [Parameter(Mandatory=$true)][string]$InputPath,
  [string]$OutputPath,
  [int]$Height=0 # 0 for input height
)

if(-not $OutputPath) {
  $OutputPath = [System.IO.Path]::ChangeExtension($InputPath, "gif")
}

$filters = "scale=-1:${Height}:flags=lanczos"
$palette = "palette.png"

ffmpeg -y -v warning -i $InputPath -vf "$filters, palettegen" $palette
ffmpeg -y -v warning -i $InputPath -i $palette -lavfi "$filters [x]; [x][1:v] paletteuse" $OutputPath
Remove-Item $palette

Works perfectly, thanks!