b69d752221
[lua scripts api] created manual from embedded library documentation [lua api] created stub to contain lua api manual
97 lines
3.1 KiB
Markdown
97 lines
3.1 KiB
Markdown
---
|
|
title: image_time
|
|
id: image_time
|
|
weight: 190
|
|
draft: false
|
|
author: "people"
|
|
---
|
|
|
|
## Name
|
|
|
|
image_time.lua - synchronize image time for images shot with different cameras
|
|
|
|
## Description
|
|
|
|
image_time non destructively adjusts image times by modifying the
|
|
database image exif_datetime_taken field. There are 4 modes: adjust time,
|
|
set time, synchronize time, and reset time.
|
|
|
|
ADJUST TIME
|
|
|
|
adjust time mode lets you chose an offset in terms of years, months,
|
|
days, hours, minutes, and seconds. The adjustment can be added or
|
|
subtracted.
|
|
|
|
WARNING: When adding and subtracting months the result will usually
|
|
be what is expected unless the time being adjusted is at the end of
|
|
the month. This is because a month is a variable amount of time that
|
|
can be 28, 29, 30 or 31 days depending on the month. Example: It's
|
|
March 31st and I subtract a month which not sets the time to February
|
|
31st. When that gets set to a valid time, then the date changes to
|
|
March 3rd.
|
|
|
|
SET TIME
|
|
|
|
set time mode allows you to pick a date and time and set the image
|
|
time accordingly. Fields may be left out. This is useful when
|
|
importing scanned images that don't have an embedded date.
|
|
|
|
SYNCHRONIZE TIME
|
|
|
|
I recently purchased a 7DmkII to replace my aging 7D. My 7D was still
|
|
serviceable, so I bought a remote control and figured I'd try shooting
|
|
events from 2 different perspectives. I didn't think to synchonize the
|
|
time between the 2 cameras, so when I loaded the images and sorted by
|
|
time it was a disaster. I hacked a script together with hard coded values
|
|
to adjust the exif_datetime_taken value in the database for the 7D images
|
|
so that everything sorted properly. I've tried shooting with 2 cameras
|
|
several times since that first attempt. I've gotten better at getting the
|
|
camera times close, but still haven't managed to get them to sync. So I
|
|
decided to think the problem through and write a proper script to take
|
|
care of the problem.
|
|
|
|
RESET TIME
|
|
|
|
Select the images and click reset.
|
|
|
|
## Usage
|
|
|
|
ADJUST TIME
|
|
|
|
Change the year, month, day, hour, minute, second dropdowns to the amount
|
|
of change desired. Select add or subtract. Select the images. Click
|
|
adjust.
|
|
|
|
SET TIME
|
|
|
|
Set the time fields to the desired time. Select the images to change. Click
|
|
set.
|
|
|
|
SYNCHRONIZE TIME
|
|
|
|
Select 2 images, one from each camera, of the same moment in time. Click
|
|
the Calculate button to calculate the time difference. The difference is
|
|
displayed in the difference entry. You can manually adjust it by changing
|
|
the value if necessary.
|
|
|
|
Select the images that need their time adjusted. Determine which way to adjust
|
|
adjust the time (add or subtract) and select the appropriate choice.
|
|
|
|
If the image times get messed up and you just want to start over, select reset time
|
|
from the mode and reset the image times.
|
|
|
|
RESET TIME
|
|
|
|
Select the images and click reset.
|
|
|
|
## Additional Software Required
|
|
|
|
* exiv2
|
|
|
|
## Limitations
|
|
|
|
|
|
## Author
|
|
|
|
Bill Ferguson - wpferguson@gmail.com
|
|
|