This uses ffmpeg to recompose video after running UVR, just drop files and it will find the right audio tracks to recompose

uvr-rebuild-no-music-cmd

@echo off
setlocal enabledelayedexpansion
chcp 65001 > nul

echo =======================================================
echo     RESTAURADOR DE AUDIO PARA CLIPS DE VIDEO (FFmpeg)
echo =======================================================
echo.

if "%~1"=="" (
    call :analizar_directorio "%CD%"
    goto fin
)

:loop_argumentos
if "%~1"=="" goto fin

if exist "%~1\" (
    echo [CARPETA DETECTADA] "%~1"
    call :analizar_directorio "%~1"
) else (
    call :evaluar_y_procesar "%~1"
)

shift
goto loop_argumentos


:analizar_directorio
for /R "%~1" %%F in ("*.mp4") do (
    call :evaluar_y_procesar "%%~fF"
)
exit /b


:evaluar_y_procesar
set "VIDEO_PATH=%~1"
set "DIR=%~dp1"
set "NAME=%~n1"
set "EXT=%~x1"

:: Ignorar si es un video ya generado anteriormente
echo "%NAME%" | findstr /I "_sin_musica" >nul
if not errorlevel 1 exit /b

set "AUDIO_LIMPIO="

:: 1. Busqueda exacta respetando el prefijo de UVR (ej: 1_export-123_(Vocals).wav)
for /f "delims=" %%A in ('dir /b /a-d "%DIR%*_%NAME%_(Vocals).wav" 2^>nul') do (
    set "AUDIO_LIMPIO=%DIR%%%A"
)

:: 2. Busqueda directa si se elimino el numero de prefijo (ej: export-123_(Vocals).wav)
if not defined AUDIO_LIMPIO (
    if exist "%DIR%%NAME%_(Vocals).wav" set "AUDIO_LIMPIO=%DIR%%NAME%_(Vocals).wav"
)

if defined AUDIO_LIMPIO (
    echo [PROCESANDO] "%NAME%%EXT%"
    echo [AUDIO APLICADO] "!AUDIO_LIMPIO!"
    
    ffmpeg -hide_banner -y -i "%VIDEO_PATH%" -i "!AUDIO_LIMPIO!" -c:v copy -map 0:v:0 -map 1:a:0 "%DIR%%NAME%_sin_musica%EXT%"
    
    if !errorlevel! equ 0 (
        echo [OK] Generado: "%NAME%_sin_musica%EXT%"
    ) else (
        echo [ERROR] Fall?? el procesado de "%NAME%%EXT%"
    )
    echo -------------------------------------------------------
) else (
    echo [AVISO] No se encontr?? pista de audio vocal asociada para "%NAME%%EXT%"
)
exit /b


:fin
echo.
echo Proceso finalizado.