#!/bin/bash

create_file() {
  dd if=/dev/urandom iflag=fullblock of="testdata/$1" bs=1M count=1 status=none
}

rm -rf testdata
mkdir testdata
ffmpeg -f lavfi -i testsrc -t 30 -pix_fmt yuv420p testdata/a.mp4
create_file "a.gif"
create_file "b.gif"
create_file "b.jpeg"
ffmpeg -f lavfi -i testsrc -t 30 -pix_fmt yuv420p testdata/b.mp4