#!/bin/bash

echo -n $1

ffmpeg -i $1 -sameq -vframes 1 /tmp/v%d.jpeg 2> /tmp/ffmpeg.out

if grep -q 'invalid mb type' /tmp/ffmpeg.out
then
  echo " BAD"
  rm /tmp/v1.jpeg
  exit
fi

echo " OK"
mv /tmp/v1.jpeg jpegs/$1.jpeg