@echo off
chcp 65001 >nul
rem 批处理保存为utf-8编码格式
rem https://blog.csdn.net/sinat_29957455/article/details/95811180

set ms=500
for /f "delims=" %%a in ('powershell -c "%ms%/1000"') do (
	for /f "delims=" %%i in ('dir /b /a-d *.mp4') do (
		md "%%~ni" 2>nul
		ffmpeg -i "%%i" -vf "select=(gte(t\,%%a))*(isnan(prev_selected_t)+gte(t-prev_selected_t\,%%a))" -vsync 0 "%%~ni\image_%%05d.jpg"
	)
)
pause
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