SET START=00:02:53.356
SET DURATION=00:13.000
SET WIDTH=320
SET HEIGHT=240
SET SPEED=4.0
SET PALETTE=c:\windows\temp\palette.png
CD /d %~dp0
ffmpeg -ss %START% -t %DURATION% -i %1 -vf setpts=%SPEED%*PTS,scale=%WIDTH%:%HEIGHT%:flags=lanczos,palettegen -y %PALETTE%
ffmpeg -ss %START% -t %DURATION% -i %1 -i %PALETTE% -filter_complex "setpts=%SPEED%*PTS,scale=%WIDTH%:%HEIGHT%:flags=lanczos[x];[x][1:v]paletteuse" -y %1_output.gif
DEL %PALETTE%
PAUSE