https://bugs.kde.org/show_bug.cgi?id=416516
Bug ID: 416516
Summary: Read/Write .mov and .mp4 rating metadata
Product: digikam
Version: 6.4.0
Platform: MS Windows
OS: MS Windows
Status: REPORTED
Severity: normal
Priority: NOR
Component: Metadata-Video
Assignee: digikam-bugs-n...@kde.org
Reporter: tims_t...@hotmail.com
Target Milestone: ---
SUMMARY
Windows can natively add a rating to mov and mp4 video files through the file
properties details window. It is stored in a QuickTime Tag called
SharedUserRating. 5 stars = 99, 4 stars = 75, 3 stars = 50, 2 stars = 25, 1
star = 0. Exiftool cannot write to this tag (as of 20/1/2020), but can read it
with the following command.
exiftool -SharedUserRating <file>
This rating is useful at the File Manager level for searches. It would be good
if DigiKam read this and added it to its database, and even better if it could
write it.
Another rating tag for mov/mp4 files that would be useful to make use of is the
xmp rating tag that Adobe Bridge can read and write. exiftool can read and
write this.
exiftool "-xmp:rating" <file>
exiftool "-xmp:rating=5" <file>
Again DigiKam does not read this, but would be good if it did.
Mov/Mp4 video files are still being produced by phones and cameras everywhere.
Ideally DigiKam would be able to read and write both these rating tags to the
metadata of mov/mp4 files for consistency and interoperability. It would not
surprise me if the Mac OS can natively edit the SharedUserRating tag too.
STEPS TO REPRODUCE
1. Set rating on mov/mp4 video file via Windows property
2. Add the file to DigiKam
3. Star rating is not read by DigiKam, nor is updated by DigiKam.
OBSERVED RESULT
Star rating is not read by DigiKam, nor is updated by DigiKam.
EXPECTED RESULT
DigiKam updates Rating metadata.
SOFTWARE/OS VERSIONS
Windows: 10
macOS: -
Linux/KDE Plasma: -
(available in About System)
KDE Plasma Version:
KDE Frameworks Version: 5.61.0
Qt Version: 5.13.1
ADDITIONAL INFORMATION
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