kux

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@echo off
setlocal enabledelayedexpansion
set ffmpeg="C:\Program Files (x86)\YouKu\YoukuClient\nplayer\ffmpeg.exe"
if exist %ffmpeg% (
    for /r . %%i in (*.kux) do (
        %ffmpeg% -y -i "%%i" -c:a copy -c:v copy -threads 2 "%%~dpni.mp4"
        
    )
) else echo

pause