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PNG export will not include metadata

New Here ,
Mar 21, 2022 Mar 21, 2022

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Open NEF files in Camera Raw > do my edits > Convert and Save Image button in top right > save / export as PNG (with ALL METADATA clearly selected)

 

When I do this, the file appears where I want it to (Edit folder) without metadata.  DNG or JPEG alway appear to include the metadata, but the DNG's don't like to open in Window's proprietary Photos App in full resolution for some reason, and JPEGs .. I don't like lossy compression.  Oh, and the DNG's won't ever appear elsewhere in the Adobe Creative Cloud or Bridge ecosystem with the edits I made.  They always appear as they did when they were RAW files.  This is enormously frustrating. 

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correct answers 1 Correct answer

Advocate , Mar 22, 2022 Mar 22, 2022

1. The PNG format does not support EXIF or IPTC.

 

2. "DNG's won't ever appear elsewhere in the Adobe Creative Cloud or Bridge ecosystem with the edits I made. They always appear as they did when they were RAW files."

DNGs are Raws and like any other Raws will display embedded JPGs when opened in a non-converter.

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Advocate ,
Mar 22, 2022 Mar 22, 2022

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1. The PNG format does not support EXIF or IPTC.

 

2. "DNG's won't ever appear elsewhere in the Adobe Creative Cloud or Bridge ecosystem with the edits I made. They always appear as they did when they were RAW files."

DNGs are Raws and like any other Raws will display embedded JPGs when opened in a non-converter.

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Explorer ,
Mar 23, 2022 Mar 23, 2022

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Then use TIFF export instead (w/ lossless deflate compression + horizontal predictor), should be comparable size to PNG.
 
quote

The PNG format does not support EXIF or IPTC.


By @elie_dinur

 

Not formally, but there is widespread support when they're stored in the ordinary PNG text chunks as raw text...

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Explorer ,
Mar 23, 2022 Mar 23, 2022

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Furthermore, it looks like the 'eXIf' chunk extension has already been registered for the PNG spec update.

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Explorer ,
Mar 23, 2022 Mar 23, 2022

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Sorry, that should've been the link to the newer 1.5 version.

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New Here ,
Mar 23, 2022 Mar 23, 2022

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Thank you.  Realized too late I was trying to fit a square peg in a round hole.  Exporting TIFF did what I was trying to accomplish; save images to my local HD and have a copy to easily access from Windows proprietary Photos App for casual viewing.  

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LEGEND ,
Mar 25, 2022 Mar 25, 2022

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JPEG is designed for photos, you'll get much better results vs file size for that than TIFF or PNG. TIFF is great for print but not computer viewing. PNG is best for flat color graphics. And yes, PNG does support a full suite of metadata.

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