I was looking for a Linux file manager that picked up the title metadata for all the files I have. Dolphin does with its Title column for pdfs and avis, but not for jpegs

I have a sample jpeg with lots of metadata set

exiftool -G -Title -Caption -ObjectName -ImageDescription -Description -UserComment -Comment Example.jpg
[XMP] Title : XMP Title
[XMP] Caption : XMP Caption
[IPTC] Object Name : IPTC Object Name
[EXIF] Image Description : EXIF Image Description
[XMP] Description : XMP Description
[EXIF] User Comment : EXIF UserComment
[File] Comment : File Comment

and have baloo running

balooshow /home/john/Pictures/Example.jpg
181456703194138645 2069 42248681 /home/john/Pictures/Example.jpg
Cached properties:
Comment: File Comment
Description: EXIF Image Description

But Dolphin leaves the Title column blank for it, and the metadata options for images are pretty useless, just being width, height and orientation (which are displayed)

How can I get Dolphin to populate the Title column for images?

I think part of the problem is src/kitemviews/private/kbaloorolesprovider.cpp

// Mapping from the URIs to the KFileItemModel roles. Note that this must not be
// a 1:1 mapping: One role may contain several URI-values
static const PropertyInfo propertyInfoList[] = {
{ "rating", "rating" },
{ "tag", "tags" },
{ "comment", "comment" },
{ "title", "title" },

where the Dolphin title maps to the Baloo title, when in fact it needs to map to Baloo 'description' for Jpgs

while I can read the source code, I little chance of getting a correct compilation environment to check out a solution

A request for Baloo to populate the Title field for jpgs has also been made. See https://bugs.kde.org/show_bug.cgi?id=428967

I installed Ubuntu 20.10, and observed no change in behaviour with baloo 5.74.9, dolphin 20.08.2

well, if you don't have KF 5.75 (as suggested in the bug report) you will not see any change, and so far very few distributions ship them, Kubuntu 20.10 is still at 5.74. So either have some patience, switch distribution or compile it yourself