How can i remove general video file detection (mimetypes or associations) from all kind of video files?

Support KDE Plasma
21

We has our suspicions too, Preciousss. :thinking:

Gollum - Nasty Little Pocketses

Sneaky little Hobbitses! Tricksy little Hobbitses! :face_with_hand_over_mouth:

22

Thought experiment:-

  • The icons appearing in Dolphin reside in a subfolder of
/usr/share/icons

and the specific subfolder is dependent upon which theme is used.

  • The permissions of all icon files (and directories) must be 755, else they will not display – I think this is correct.

So, logically… If permissions other than 755 are applied to selected icons in that theme they will not display in Dolphin and the resources previously used will be freed.

Therefore, if the dolphin is made of wood, it must be a duck…
The :duck: Test!

I’m in another unspecified OS currently and can’t test this, so I’ll just wait, and doodle a while till someone chimes in with their results.


    _ '_
  /      \
 |        |
 |     ____)
 |    / \/ \
 /\/\ (o)(o)|    I am Homer of Borg. You will be assimilated
/c     \__/--.   Resistance ... is ... Hmmmm,  Donuts!!!
\__  -------'    ___________________________________________
  |  /      \ 
  | |  \_____)     
  |  \_____)
  | _____|
  |______/\/\
 /           \

FFMPEG

Try uninstalling and replacing ffmpegthumbs, and possibly ffmpeg also. See if a fresh install makes any difference to the icon display.

Compositor

Is there a setting somewhere to manage compositor latency?

Turn off the display, of disk and folder volumes. Maybe.

FSTAB

23

I encrypt everything, even my Steam Backup Games are encrypted.

I think it makes sense, just in case when i get maybe infected in future by a ransom crypto trojaner, it may can’t encrypt my stuff again and can’t blackmail me then.

You never know when there is a emergency, but what i learned from Sheldon Cooper, there is no need to life when all USB Ports gets destroyed :laughing:

24

Perhaps you might get a more definitive answer on whether or not what you want is achievable (with the current version of Dolphin) over at https://discuss.kde.org

3 Likes
25

Why not use LUKS partition instead of slow veracrypt?

I use it on my external HDD with XFS.

1 Like
26

And in at number 5, it’s The Supremes, and “Baby Love”…

Off-topic, and part of a classic segue taken from the motion picture Airplane (1980).

1 Like
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Leslie Nielsen

28

You do realise those files or the whole Filesystem can be re encrypted, by said Ransomware, or any other encryption tool.

Also, what @ Zesko said, if you are going to go to the unnecessary trouble of encrypting, for that reason.

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I was about to suggest checking this… although it’s not clear whether the OP is talking about KDE being slow when generating thumbnails, or just displaying the default icons. It seems more likely that anything run by /usr/share/thumbnailers/*.thumbnailer would be much slower than simply displaying icons. Maybe KDE has the equivalent of gtk-update-icon-cache, which needs to be run? I’ve not used KDE in a long time, so I’m not sure how Plasma behaves these days.

EDIT: Maybe try:

kbuildsycoca5 --noincremental
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Slow generally, is my understanding.

31

Ok, makes sense. I just re-read this:

In any case… messing with system-level mime types for all video files seems a heavy-handed & misguided workaround for the original problem: slowness when viewing folders of video files in Dolphin.

3 Likes
32

This (posted earlier) might still be related. The OP might think so too, considering he was in the same thread when it was originally posted:

33

Hmm… strange that KDE behaves slowly in that thread due to a noauto mount, unless somehow it’s trying to auto-mount (e.g. autofs, gvfsd, or kio-extras ) a related NFS share or something. NFS is known to cause system hangs due to default blocking mounts, unless using the soft mount option (usually with: bg,intr,soft).

In any case, maybe the OP of this thread can review this KDE article about caches, and see if rebuilding the icon cache (?? command for this ?? :person_shrugging:), and the KDE SYstem COnfiguration CAche (e.g. kbuildsycoca5 --noincremental for .desktop and MIME type .xml caches)?

34

This seemed to indicate network mounts:

LABEL=EXT_HD6 /srv/nfs/m/h6 ext4 noauto,users,noatime,nodev,nosuid,noexec 0 0
LABEL=EXT_HD7 /srv/nfs/m/h7 btrfs noauto,users,noatime,nodev,nosuid,noexec,compress=lzo,subvol=@ 0 0
35

Yeah, usually for NFSv4, the default NFS root for bind-mounts is /srv/nfs. So, it looks like in that thread they’re setting up NFSv4 shares for use with /etc/exports, which are backed by mounts for external drives via filesystem labels, but noauto is set. So, the system shouldn’t auto-mount them. Not sure what KDE does in this case that makes it slow.

36

Unless his problem folder is symlinked to one of those drives; it would be no great wonder that his icons wouldn’t load; if that’s what was happening.

37

I have deactivated Thumbnails for that reason and Thumbnails also not showing in details view mode anyways.

Im actually not even sure if this icon’s are the real problem here or why my HDD is reading every file only just because i open a folder… it was a simple suggestions, that it may are connected to this icons… i just wondering why it can take this long to open it… only because its a HDD and no SSD?

Anyways, i don’t want to mess with my OS to heavily… i prefer to try things out that i can easy revert without destroying my Manjaro install.

I openend this Topic for a possible quick solution and if there is anything its still not a big issue for me and I don’t want to waste anyone’s time here.

38

The quickest solution, with the least amount of issues for your OS install, would be to NOT encrypt your files.

Given the reasons you gave for doing so, it is a pointless and futile exercise.

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There could be many reasons why an external HDD is appearing to behave slower, including:

  • Compared to solid-state disks (SSD), spinning hard-disk drives (HDD) are known to perform more slowly
  • Physical cabling & transmission speed limits can impact overall speed of the disk (e.g. SATA vs. eSATA vs. USB2, vs. USB3, vs. USB3.x, etc…)
  • Adding encryption on top of any filesystem increases IO speeds due to the extra processing needed to encrypt (unless the underlying hardware specifically supports this, it’s usually done in software)
  • HDD Indexing services (e.g. KDE’s baloo, GNOME’s gnome-tracker + tracker-miner, or Spotlight on macOS)
  • *.thumbnailers
    • These programs are run by file managers (e.g. KDE’s Dolphin, GNOME’s Nautilus, LXDE’s PCManFM, etc…) to auto-generate thumbnails on the fly as the user browses their filesystem.
    • Some are known to perform slowly and/or not be very well multithreaded (e.g. GNOME <45 did not do concurrent thumbnailing well)
  • Icon caches, .desktop app launcher & file-handler caches, MIME-type caches, & other system caches
    • These are files generated usually under $XDG_CACHE_HOME (default: ~/.cache)
    • They are generated on the fly to help speed up related operations. For example:
      • Pre-rendering SVG icons at standard sizes to speed up displaying icons
      • Pre-computing available MIME-types & identification criteria
      • Pre-computing all available .desktop app-launchers and their supported MIME-types for default file handling
      • etc…
1 Like
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