@echo off &setlocal enabledelayedexpansion
set path=.\;%path%
set "video=test.vob"
ffmpeg -i %video% 2>info.txt

for /f "tokens=2,3,4 delims=.:, " %%a in ('type info.txt ^|find "Duration"') do (
    echo %%a:%%b:%%c
    set /a hour=%%a, min=%%b, sec=%%c, len=%%a*3600+%%b*60+%%c, last=len-15-10
)

set palette=palette.png
:: gen palette
ffmpeg -i %video% -vf palettegen -y %palette%

:: now convert
for /l %%a in (10, 10, %last%) do (
    ffmpeg -y -i "%video%" -i %palette% -lavfi paletteuse -y -ss %%a -t 10 -r 10  "%video%_%%a.gif"
)
pause
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