FFmpeg batch file for trimming videos with downmix 5.1 to stereo and subtitles from source video.

ffmpeg-trim.bat

@echo off
:again

set /P start="Start: "
set /P end="End: "
set /P bit="Bitrate: "
set /P max="Maxrate: "

ffmpeg ^
    -ss %start% ^
    -to %end% ^
	-i "%~1" ^
	-c:v libx264 ^
	-b:v %bit% ^
    -maxrate %max% ^
    -threads 10 ^
    -c:a dca ^
    -strict -2 ^
    -af "volume=1.7, pan=stereo|c0=0.5*c2+0.707*c0+0.707*c4+0.5*c3|c1=0.5*c2+0.707*c1+0.707*c5+0.5*c3" ^
	"%~p1%~n1_1.mp4"
	"%~p1%~n1.srt"
if NOT ["%errorlevel%"]==["0"] goto:error
echo %~n1 Done!

shift
if "%~1" == "" goto:end
goto:again

:error

echo There was an error.
pause
exit 0

:end

cls
echo Encoding succesful. This window will close after 7 seconds.
timeout /t 5