Automate conversion of .mp4 rom snaps to .jpg screenshots.

snap2screenshot.bat

@echo off
for /D %%i in (./roms_snaps/*) DO (
	echo %%i
	if not exist "roms_snapschreenshots\%%i\screenshot" (
		echo No %%i/screenshot Folder
		mkdir roms_snapschreenshots\%%i\screenshot
	)
	for %%r in (./roms_snaps/%%i/snap/*.mp4) DO (
		if not exist "roms_snapschreenshots/%%i/screenshot/%%~nr.jpg" (
			echo No screenshot... Grabbing one...
			ffmpeg -i "roms_snaps/%%i/snap/%%r" -ss 00:00:01.500 -vframes 1 -vf "scale=min(iw*400/ih\,400):min(400\,ih*400/iw),pad=400:400:(400-iw)/2:(400-ih)/2" -t 1 -f image2 "roms_snapschreenshots/%%i/screenshot/%%~nr.jpg" -hide_banner
rem	-vf "scale=min(iw*TARGET_HEIGHT/ih\,TARGET_WIDTH):min(TARGET_HEIGHT\,ih*TARGET_WIDTH/iw),
rem	     pad=TARGET_WIDTH:TARGET_HEIGHT:(TARGET_WIDTH-iw)/2:(TARGET_HEIGHT-ih)/2"
		)
	)
)

Had a need to create a bunch of image screenshots for the roms in my collection. Here is a small windows bat file that will go through a roms folder and for each of the snap .mp4 files, create a screenshot .jpg file. Make sure you drop a copy of the ffmpeg.exe file (https://www.ffmpeg.org/download.html#build-windows) into the same folder as the .bat file. I used a latest static build.