MP4 Prepwork, upscales to 720p 16:9

transform.sh

for mp4 in *.mp4
do
  echo $mp4

  ffmpeg \
  -i "$mp4" \
  -y \
  -r 15 \
  -vf "scale=1280:720:force_original_aspect_ratio=decrease,pad=1280:720:(ow-iw)/2:(oh-ih)/2,format=yuv420p" \
  -pix_fmt yuv420p \
  -c:v libx264 \
  -b:v 3000k \
  -b:a 128k \
  -c:a aac \
  -ac 2 \
  -g 50 \
  -preset ultrafast \
  -tune zerolatency \
  out/"$mp4"
done