Metadata - unify 'Clean metadata' dialog

[user0]

XnViewMP 1.4.3 64bit
Windows11 (22H2), display resolution 3840x2160, win scaling 150%

Clean metadata
1) Why are these 'Clean metadata' dialogs different?
2) Why does EXIF ​​still remain after being selected for removal in Viewer/Batch convert?
3) What exactly is this underscore mark ( _ ) metadata, remained after cleaning via Viewer/Batch convert?

test_metadata_clear.zip

Suggestion

• unify 'Clean metadata' dialog in Browser, Viewer and Batch Convert.
  Options must be the same in all modes for the same file.

• remove 'Optimize Huffman table' as it is format specific (jpeg only?) and not related to metadata in other formats.
  It shall be somewhere in format Write settings

• controls' vertical alignment shall be Top, not 'Stretched down' as it results in gapes between them when dialog is resized.

metadata_unify_'Clean metadata'_menu.png

Potential bug:
'Clean metadata' in Viewer mode:
- available for the file without metadata (in Browser mode it is disabled if file has no metadata)
- resets DPI of image file without metadata, test file available here. File's DPI was 72x18 and became 72x72 after 'Clean metadata'.



Related

• suggestions
  Metadata - merge all Edit dialogs into single one
  Metadata - unify 'Clean metadata' dialog (current post)
  - done -
  Metadata - unify menu group in Browser/Viewer toolbar and context menu (done in 1.5.0)

[Gerald_Ire]

Q: Shouldn't we prevent deleting copyrights in images?

[user0]

Q: Shouldn't we prevent deleting copyrights in images?

This dialog should be as simple as possible and delete ALL metadata.
Because copyright data is no more important than any other metadata field. Today one user will ask to add settings to keep field A from deletion, the next day another one will ask to keep field B, and so on, resulting in overcomplicated dialog.

There shall be another instrument for editing/deleting any metadata field(s) for single file or in batch.

[Lewis]

100% agreed on all points.
I don't understand why the dialogs are different in different places. It looks like an oversight/bug. For a long time I thought XnView MP doesn't even support lossless metadata removal, because I mostly use the Viewer mode, which makes you re-encode and re-save after removal.