date

Safari: ‘a.getTime’ is undefined

 in FireFox / JavaScript  tagged date / javascript / safari by

Recently, we were working with Google Charts at which we were presenting data from a timeline with some processing.
Our JavaScript code was formatted as follows to create Date objects:

$value = "2020-03-19 23:45:00";
var dateStrFormat = new Date($value);

The above code worked fine on Firefox and Chrome but it failed on Safari with the error:
a.getTime is not a function. (In 'a.getTime()', 'a.getTime' is undefined)
After some investigation we found that Safari does not support a Date() constructor that contains time as well so we had to change the code to the following block:

var dateStr = "2020-03-19";
var dateStrFormat = new Date(dateStr);
var hourStr = "23";
var minutesStr = "45";
dateStrFormat.setHours(hourStr, minutesStr);

The above works on all browsers!

Change date in GoPro media (photos/video/low quality videos/still frames) files 2

 in GNU/Linux  tagged date / EXIF / exiftool / GoPro / metadata by

Recently, we took some videos and pictures with our GoPro camera which was not used for some time and discharged. Due to that, the date and time configuration of the camera was wrong and the resulting video files had wrong metadata information in their EXIF.

To update the dates in the produced video and photo files we used the exiftool that is shipped in the perl-Image-ExifTool package.
We usually use Fedora, so we used dnf to install the application with all needed dependencies as follows:


sudo dnf install -y perl-Image-ExifTool;

After installing exiftool, we used the following script to change the dates and times of the media files using an offset between the camera date and the real date:

[download id=”4544″]

#!/bin/bash

directory="$1";
echo "Processing '$directory'";
date_change="$2";
echo "Change '$date_change'";

find "$directory" \( -iname "*.mp4" -o -iname "*.lrv" -o -iname "*.jpg" -o -iname "*.thm" \) -type f -execdir sh -c '
	image=$1;
	echo "$image ";
	old_date=`exiftool -d "%a %b %d %T %Z %Y" -CreateDate -S -s "$image"`;
	echo -e "\t$old_date";
	new_date=`date -d "$old_date $date_change"`;
	echo -e "\t$new_date";
	formated_date=`date "+%Y:%m:%d %H:%M:%S %Z" -d "$new_date"`;
	echo -e "\t$formated_date";
	exiftool "-AllDates=$formated_date" "-TrackCreateDate=$formated_date" "-TrackModifyDate=$formated_date" "-MediaCreateDate=$formated_date" "-MediaModifyDate=$formated_date" -overwrite_original "$image";
' _ '{}' \;

[download id=”4544″]

Usage Example:

After we extracted the script to a folder we were able to use it as follows:


./mediaDates.sh '/run/media/100GOPRO' '+ 3 years + 6 months + 11 days + 7 hours + 5 minutes';

Notes:

  • You need extra disk space to update the file as it creates a copy of it even if you overwrite the original
  • If you skip -overwrite_original, then a new file will be created
  • We had to update several date fields in order to be sure that we covered all of them that were visible in the EXIF data of the media

Link to an older post that handles a single video each time.

Change date in GoPro video files 1

 in Bash / GNU/Linux  tagged date / EXIF / exiftool / GoPro / metadata by

Recently, we made some time-lapses with our GoPro camera which was not used for some time and discharged. Due to that, the date and time configuration of the camera was wrong and the resulting video files had wrong metadata information in their EXIF.

To update the dates in the produced video files we used the exiftool that is shipped in the perl-Image-ExifTool package. We use Fedora, so we used dnf to install the application with all needed dependencies as follows:


sudo dnf install -y perl-Image-ExifTool;

After installing exiftool, we used the following commands to change the dates and times of the video named GOPR6426 (and its preview / thumbnail video):


$ mydate='2018:02:23 15:20:00';
$ exiftool "-AllDates=$mydate" "-TrackCreateDate=$mydate" "-TrackModifyDate=$mydate" "-MediaCreateDate=$mydate" "-MediaModifyDate=$mydate" -overwrite_original GOPR4626.*;

Notes:

  • You need extra disk space to update the file as it creates a copy of it even if you overwrite the original
  • We used the wildcard character * in our command to make sure we update not only the main video but also the preview / thumbnail videos that GoPro produces.
  • If you skip -overwrite_original, then a new file will be created
  • We had to update several date fields in order to be sure that we covered all of them that were visible in the EXIF data of the media

Link to a newer post that handles folders of pictures and video using the time difference between the real date and the camera date.

Bash: Get date N days ago in the format YYYY_MM_DD

 in Bash  tagged date by 
DEFAULT_DAYS_BACK="0";
DAYS_BACK=${1:-$DEFAULT_DAYS_BACK};
PROCESSING_DATE=`date --date="$DAYS_BACK day ago" +%Y_%m_%d`;

The above code will populate variable PROCESSING_DATE with the date of the day the was DAYS_BACK ago using the format YYYY_MM_DD.

The value for DAYS_BACK is filled by the first argument of the script/function $1. In case the user did not provide an argument, we have the variable DEFAULT_DAYS_BACK that will be used as the default value.