Add time code to Google Pixel or iPhone videos

add_timecode.sh

#!/bin/bash 
#
# Add time code to Google Pixel videos by extracting it from 
# the filename.

# When executing via Finder, run in the folder there it is located
cd -- "$(dirname "$BASH_SOURCE")"

pxl_filename_to_timecode() {
	# $1 = PXL_20201202_123357972.jpg
	TIME=$(cut -d'_' -f3 <<< $1)
	# $TIME = 123357972.jpg 
	HOUR=$(cut -c 1-2 <<< $TIME)
	MINUTE=$(cut -c 3-4 <<< $TIME)
	SECOND=$(cut -c 5-6 <<< $TIME)
	MS=$(cut -c 7-9 <<< $TIME)
	TC_MS=$(expr $MS \* 59 / 999)

	if [[ $TC_MS -lt 10 ]]; then 
		echo "$HOUR:$MINUTE:$SECOND:0$TC_MS"
	else
		echo "$HOUR:$MINUTE:$SECOND:$TC_MS"
	fi
}

iphone_videos_to_timecode() {
	# Only works in OSX
	# Get creation date
	# 03/31/2025 11:53:40
	TIME=$(GetFileInfo -d "$1")
	HOUR=$(cut -c 12-13 <<<$TIME)
	MINUTE=$(cut -c 15-16 <<<$TIME)
	SECOND=$(cut -c 18-19 <<<$TIME)

	echo "$HOUR:$MINUTE:$SECOND:000"
}

# For Google Pixel videos
for filename in *.mp4; do
	DELIMITER=$(echo "_tc")

	if [[ "$filename" =~ .*"$DELIMITER".* ]];then
		echo "Ignore file $filename"
	else
		TIMECODE=$(pxl_filename_to_timecode "$filename")

		FILE_EXTENSION=$(echo "$filename" | awk -F'[.]' 'NF>1 {print $NF}')
		FILE_NAME=$(echo "$filename" | cut -d. -f1)

		NEW_FILENAME=$(echo "${FILE_NAME}${DELIMITER}.${FILE_EXTENSION}")

		if ! [ -f $NEW_FILENAME ]; then
			echo "Added timecode ${TIMECODE} to ${filename} in ${NEW_FILENAME}"

			ffmpeg -i "$filename" -timecode $TIMECODE -codec copy "$NEW_FILENAME" 2> /dev/null
		else 
			echo "Timecoded file ${NEW_FILENAME} already exists!"
		fi
	fi
done

# For iPhone videos
for filename in *.MOV; do
	DELIMITER=$(echo "_tc")

	if [[ "$filename" =~ .*"$DELIMITER".* ]];then
		echo "Ignore file $filename"
	else
		TIMECODE=$(iphone_to_timecode "$filename")

		FILE_EXTENSION=$(echo "$filename" | awk -F'[.]' 'NF>1 {print $NF}')
		FILE_NAME=$(echo "$filename" | cut -d. -f1)

		NEW_FILENAME=$(echo "${FILE_NAME}${DELIMITER}.${FILE_EXTENSION}")

		if ! [ -f $NEW_FILENAME ]; then
			echo "Added timecode ${TIMECODE} to ${filename} in ${NEW_FILENAME}"

			ffmpeg -i "$filename" -timecode $TIMECODE -codec copy "$NEW_FILENAME" 2> /dev/null
		else 
			echo "Timecoded file ${NEW_FILENAME} already exists!"
		fi
	fi
done