concat_mp4_v2.sh

#!/bin/bash -e

FFMPEG=./ffmpeg

rm -f *.mp4 *.ts

$FFMPEG -f lavfi -i testsrc,hflip -t 5 -x264opts stitchable=1 -vcodec libx264 -y 1.mp4
$FFMPEG -f lavfi -i testsrc,vflip -t 5 -x264opts stitchable=1 -vcodec libx264 -y 2.mp4

for x in mp4
do
	for y in mp4
	do
		CONCAT_FILENAME="concat_${x}_and_${y}"
		echo "ffconcat version 1.0
		file 1.$x
		file 2.$y
		" > $CONCAT_FILENAME

		z=mp4
		$FFMPEG -safe 0 -auto_convert 1 -i $CONCAT_FILENAME -c copy -y ${CONCAT_FILENAME}.$z
	done
done