for /r %%X in ("*.gif") do (
# ffmpeg -loop 1 -i "%%X" %%X.mp4
# ffmpeg -i "%%X" -loop 1 -c:v libx264 -s 1920x1080 -preset veryfast -crf 28 -r 25 -pix_fmt yuv420p -t 00:30:00 "%%X.mp4"
# ffmpeg -i "%%X" -ignore_loop 0 -c:v libx264 -s 1920x1080 -preset veryfast -crf 28 -r 20 -pix_fmt yuv420p -t 00:00:05 -r 25 "%%X.mp4"

ffmpeg -i "%%X" "%%X.mp4"

)