@echo off
set PATH=%PATH%;"E:\Static Programs\ffmpeg-20190416-e2f766e-win64-static\bin\"
cd C:\tmp\overlay_frames
ffmpeg -framerate 60 -start_number 0 -i %%04d.png -c:v libvpx-vp9 -b:v 1M -pix_fmt yuva420p C:\tmp\.result.webm
PAUSE