--- webm2mp4.bat (WhatsApp) ---
@echo off
ffmpeg -i "%~f1" -vf "pad=ceil(iw/2)*2:ceil(ih/2)*2" -c:v libx264 -c:a aac -strict experimental -loglevel error -max_muxing_queue_size 1024"%~n1.mp4"
---

&

--- mp42webm.bat (4chan) ---
@echo off
ffmpeg -i "%~f1" -vf "pad=ceil(iw/2)*2:ceil(ih/2)*2" -c:v libvpx-vp9 -b:v 1M -c:a libopus "%~n1.webm"
---

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