I have PNG images with EXIF, XMP and IPTC metadata that I want to maintain, when I create WEBP images.
I am running a Windows computer. I have tried a few ways and I failed.
I know that WEBP doesn't support IPTC metadata, just EXIF and XMP, I would be fine if just XMP would be maintained/transferred to WEBP.
Original WEBP encoder by Google has this option:
-metadata string: A comma separated list of metadata to copy from the input to the output if present. Valid values: all, none, exif, icc, xmp. The default is none.
I've used such command line:
cwebp -metadata all image.png -o image.webp
However, such command line brings this warning, thus no metadata is maintained:
Warning: only ICC profile extraction is currently supported on this platform!
I've also tried another Google tool WebpMux. I've exported EXIF and XMP metadata blocks with ExifTool to .exif and .xmp files and ran such command lines:
webpmux -set exif image.exif image1.webp -o image2.webp
webpmux -set xmp image.xmp image1.webp -o image2.webp
Metadata wasn't inserted.
I then found Exiv2 tool, that says that it's capable of inserting image metadata into WEBP images.
I've tried this command:
exiv2 -ee- image.png | exiv2 -ie- image.webp
It copies just some of the XMP metadata, not all, for instance, image headline isn't copied, while description is.
I've also tried extracting metadata with Exiv2 to an .exv file and them inserting it into WEBP file via this command line:
exiv2 -ep image.webp
No luck.
I have also tried importing EXIF and XMP metadata files with Exiv2 - didn't work as well.
QUESTIONS:
Is there any working way to insert EXIF and/or XMP metadata to WEBP images?
Or maybe I've used the tools wrong? Share the proper command lines then please.
