After you open a folder with MP4 files, Nemo seems to access every single MP4 file in that folder. I'm sure it has some good purpose, but unfortunately, it causes a performance penalty and a period of unresponsiveness on highly populated folders (say a thousand MP4 files), especially on non-flash media, and needlessly wastes battery power on laptops.
Is there some way to turn this behaviour off?
If there is no way, I will have to find a different file manager which does not have this behaviour. I am overall satisfied with Nemo, but I'd have to use the different file manager for the purpose of browsing folders with many MP4 files.
How to prevent Nemo from accessing all MP4 files in a folder?
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Re: How to prevent Nemo from accessing all MP4 files in a folder?
Disable thumbnails maybe? I don't use thumbnails ever, so I have no performance penalty even in large folders with tons of stuff.
Re: How to prevent Nemo from accessing all MP4 files in a folder?
I'm thinking turning off thumbnails too. I haven't used video thumbnails for years. I figure that if I need the thumbnail to remember what a video is I probably don't want to see it any more anyway. So I just delete it.
In any case I've never heard of any file manager that will selectively not display all files of a particular type in a folder. What criteria would you use? It makes no sense to me.
In any case I've never heard of any file manager that will selectively not display all files of a particular type in a folder. What criteria would you use? It makes no sense to me.
For every complex problem there is an answer that is clear, simple, and wrong - H. L. Mencken
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tomhofmann
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Re: How to prevent Nemo from accessing all MP4 files in a folder?
In Nemo, open menu Edit > Preferences. Click on the Preview tab. You can set whether Nemo shows thumbnails, which should stop them from being generated
To stop all thumbnails, click on the drop-down combo box by "Show thumbnails" and select none.
You can also ask it so skip previews of large files. By setting a limit of 5 or 10 MB, you could see thumbnails for images but skip larger movies. YMMV
To stop all thumbnails, click on the drop-down combo box by "Show thumbnails" and select none.
You can also ask it so skip previews of large files. By setting a limit of 5 or 10 MB, you could see thumbnails for images but skip larger movies. YMMV
Re: How to prevent Nemo from accessing all MP4 files in a folder?
also check your thumbnail settings for local vs remote--some remote usb style sources are super slowHyperBear wrote: ⤴Wed Apr 30, 2025 1:27 pm After you open a folder with MP4 files, Nemo seems to access every single MP4 file in that folder. I'm sure it has some good purpose, but unfortunately, it causes a performance penalty and a period of unresponsiveness on highly populated folders (say a thousand MP4 files), especially on non-flash media, and needlessly wastes battery power on laptops.
Is there some way to turn this behaviour off?
If there is no way, I will have to find a different file manager which does not have this behaviour. I am overall satisfied with Nemo, but I'd have to use the different file manager for the purpose of browsing folders with many MP4 files.
Limit thumbnails to local
I have also seen media players claim folder access, in which case just right-click any folder and choose to
Open With and point back to the file manager (Nemo Caja Thunar)
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Thumbnails are already off.
Hoser Rob wrote: ⤴Wed Apr 30, 2025 2:23 pm I'm thinking turning off thumbnails too. I haven't used video thumbnails for years. I figure that if I need the thumbnail to remember what a video is I probably don't want to see it any more anyway. So I just delete it.
In any case I've never heard of any file manager that will selectively not display all files of a particular type in a folder. What criteria would you use? It makes no sense to me.
I have already turned thumbnails off, and it still tries to access every MP4 file in a folder.tomhofmann wrote: ⤴Thu May 01, 2025 9:02 pm In Nemo, open menu Edit > Preferences. Click on the Preview tab. You can set whether Nemo shows thumbnails, which should stop them from being generated
To stop all thumbnails, click on the drop-down combo box by "Show thumbnails" and select none.
You can also ask it so skip previews of large files. By setting a limit of 5 or 10 MB, you could see thumbnails for images but skip larger movies. YMMV
I have turned off all thumbnails. "Show thumbnails:" is set to "No".all41 wrote: ⤴Thu May 01, 2025 9:30 pm also check your thumbnail settings for local vs remote--some remote usb style sources are super slow
Limit thumbnails to local
I have also seen media players claim folder access, in which case just right-click any folder and choose to
Open With and point back to the file manager (Nemo Caja Thunar)
In Celluloid (media player), disabling "prefetch metadata" will prevent accessing every file in a playlist. The prefetched metadata is used to show titles in the playlist side pane, but I don't need it, so I turned it off.
It seems trying out different file managers is the only solution.