@djaouws – Thank you for taking the time to read these posts and respond with a link to the earlier support topic along similar lines.
@atomicmak,
Thank you for starting a new support topic for this question, and for your patience while I pushed out a new MLA version.
Thanks as well for posting links to some of the images on your site (beautiful) and the details of what you want to retrieve for each one. This is very helpful; I was able to analyze the IPTC and EXIF data in each of the four images.
The IPTC information in all four images is about the same, although the white_browed_bulbul__dsc1651-2.jpg file has two additional fields, “2#062 DigitalCreationDate” and “2#063 DigitalCreationTime”, that suggest this image was edited and re-saved; is that possible?
The IPTC data you have available is:
- 2#080 By-Line
- 2#085 By-LineTitle
- 2#120 Caption-Abstract
- 2#116 CopyrightNotice
- 2#055 DateCreated (YYYYMMDD)
- 2#025 Keywords (21-25 terms each)
- 2#005 ObjectName
- 2#060 TimeCreated (HHMMSS+0530 or HHMMSS)
I have added the IPTC Identifier to the names. The names are as I found them in the images, and are slightly different than the “Friendly Names” MLA uses.
The EXIF data contains the camera details you are interested in. As you have seen, WordPress applies some logic to the raw EXIF values and tries to put the most common values in the Image Metadata (image_meta). The issues you observed in the four example images are caused by issues in the EXIF raw data; there’s nothing WordPress can do about that.
Here are the values you want to extract and some analysis from the four example images you provided:
Camera Model :
You can use EXIF “Make” and “Model”. This is available in two of your four images; a third image contains corrupted values and the fourth image has no data.
Focal Length :
You can use EXIF “FocalLength” or “FocalLength35mmFilm” (which looks more useful).
Aperture :
WordPress sources this from EXIF “ApertureValue”, a “double” or “integer” value which isn’t very useful. A much better choice would be the EXIF “Computed” value “ApertureFNumber”. In MLA you can access this as “COMPUTED.ApertureFNumber”. All four images show reasonable values: “f/1.1”, “f/8.0”, “f/7.1” and “f/11.0”.
You might also use EXIF “UndefinedTag:0xA434” (XMP LensModel), which contains values like “80.0-400.0 mm f/4.5-5.6”
Shutter Speed :
You can try using “ExposureTime” or “ShutterSpeedValue”, which will give you raw data.
ISO :
You can use EXIF “ISOSpeedRatings”.
Metering Mode :
This is available as EXIF “MeteringMode”.
Exposure Bias :
This is available as EXIF “ExposureBiasValue”. There are also “ExposureMode”, “ExposureProgram” and “ExposureTime”.
Date Taken :
This is available as EXIF “DateTimeOriginal”, although the blue_cheeked_bee_eater__brc2939.jpg file has blanks in this value. You can also use IPTC 2#055.
Copyright/Credit :
This is available as EXIF “COMPUTED.Copyright”. You can also use IPTC 2#116.
So, that is what you have available to you in the IPTC and EXIF meta data in the image files. You have a few alternative ways to access and use the data:
- You can use the data directly in an
[mla_gallery] shortcode. For example, you can add mla_caption="{+exif:Make+}<br>{+exif:Model+}<gr>{+iptc:2#055+}" to your shortcode.
- You can map the data into a custom field. I gather that you have tried this and are having trouble with it.
- You can map the data into the WordPress
image_meta array, if that works for your application.
- If you are working in PHP, modifying the
image.php code you can bypass MLA entirely and use the PHP exif_read_data() function that MLA uses to get the data.
I would like to know more about the “ERROR: IPTC/EXIF settings update failed” messages you reported, which I have not seen before (they come from a part of the MLA code that has always worked in the past). Can you tell me the steps you took that resulted in this error so I can try to reproduce it on my test system? Have you tried the “Delete Rule AND Field” button to completely remove the rule and start over?
If you can tell me more about your errors and tell me which of the “ways to access and use the data” you would like to try I can be more specifically helpful. Thank you for any additional information you can provide.
