I have a problem with passing parameters to variables in BAT file:
@setlocal enableextensions enabledelayedexpansion
if "%5" NEQ "" (
echo [%5][%6] //it displays normal parameters like 10 and 30
set /a sstart=%~5 // was testing without /a, without ~, with $, in all combinations
set /a sstop=%~6
echo [%sstart%][%sstop%] // parameters are empty
set sekstart=--start-at duration:%sstart%
set /a sekstopr=%sstop% - %sstart%
set sekstop=--stop-at duration:%sekstopr%
echo Start: %sstart% Stop: %sekstop%
)
This is for encoding in Handbrake: https://trac.handbrake.fr/wiki/CLIGuide