Intert timecode into multiple movies

insert_timecode.sh

#!/usr/local/bin/bash
for i in *.MP4; do
	frame_rate=25
	#$(ffprobe -i -show_streams 2>&1|grep fps|sed "s/.*, \([0-9]*\)   fps,.*/\1/")
	#clipname=${(basename "$i")/\.*/}
	#ffmpeg -i "$i" "${i/.MP4/_tc.mov}"

	timecode="${i:7:2}\\:${i:10:2}\\:00\\:00"
	echo $timecode
	ffmpeg -i "${i}" -copyts -vcodec libx264 -b:v 20000k -an -vf drawtext="fontfile=/usr/local/share/munin/DejaVuSansMono.ttf:rate=${frame_rate}:timecode=\\'${timecode}\\':textfile=textfile:fontsize=18:fontcolor=\\'white\\':boxcolor=0x000000AA:x=w-(tw+10):y=h-(th+10)" "${i/.MP4/_tc.mp4}"
done