Mouse over image preview for movie files KDE4.


A long … long … time ago when KDE 3.5 was still “the hype” konqueror file browser used to show a image of a frame of the video files when the mouse was over a selected video file.

Is it possible to enable/install this functionality on Dolphin or the neutered Konqueror in KDE4 ?
If so how ?


I thought this was still the default behaviour.

Both Konqueror and Dolphin offer to configure the previews / thumbnails in their settings (General → Previews, hope I translated it okay). This will create thumbnails for all supported video files and a hover effect which generates ongoing thumbnails until the mouse pointer moves away - quite neat actually.


Ok, let me explain better the issue.

In kde 3.5 when a file was selected a thumbnail was shown when the mouse hovered the file.
That thumbnail showed an actual frame of the video file selected.

The current thumbnail that I see does not show an image of the movie, it show a worthless icon for all files.
I tested of course the preview options.
They only work for text files, pdf’s and image files, not movie in any format … flv, mp4 etc …
And I have installed all Packman relevant packages and the default file association is VLC.

Anyone with the same problem?



Wait !!!
I can see some light in the end of the dark tunnel !!!
ummm strange …
Some files do show the preview …

It is a problem of file name termination … meaning … codecs …
The files that end with .avi .mpg display the image …
The ones that terminate with .mp4 and .flv don’t …

umm file association problem … one more try at the thing … lets see …
Nope … some display some don’t -… strange behavior …

Lack of codecs ?!..

I have to re-installed all restricted codecs and restart session …
back on this in a minute.


You need a plugin installed that it works (it works then automatic when you
have the preview enabled). Don’t hit me I do not remeber exactly, but think
it should be there if you install mplayer (it is mplayerthumbs or so).
Sorry for being so unprecise.
It works on my machines and did nothing special but have everywhere mplayer

PC: oS 11.3 64 bit | Intel Core2 Quad Q8300@2.50GHz | KDE 4.6.3 | GeForce
9600 GT | 4GB Ram
Eee PC 1201n: oS 11.4 64 bit | Intel Atom 330@1.60GHz | KDE 4.6.3 | nVidia
ION | 3GB Ram

Since mplayerthumbsconfig is part of the package kdemultimedia4 (which
should be installed by default I guess, just check if it is) the only thing
you need in addition is in fact to have mplayer installed, so check that

PC: oS 11.3 64 bit | Intel Core2 Quad Q8300@2.50GHz | KDE 4.6.3 | GeForce
9600 GT | 4GB Ram
Eee PC 1201n: oS 11.4 64 bit | Intel Atom 330@1.60GHz | KDE 4.6.3 | nVidia
ION | 3GB Ram

Bingo !

Right on target Martin … I did not have mplayer installed.
All codecs and multimedia stuff was right and Packman repository configured.

But the strangest thing happened before the install of mplayer … some thumbnails where shown correctly for the Same file type. For example like Revolutions.avi did not display a thumbnail image, yet the_code.avi displayed the thumbnail image.
And no .flv file shown any image as well as .mp4 encodings …

After the mplayer install all is well.

The problem with my particular install is also the one I already addresses in another thread. I have a /home mount in a separate hdd from a 11.1 clean install.
So some older config conflicts can occur.
I notice so far a stable operation and apart from things I do not like in kde4 I think I made the right decision installing on top of an older /home folder.
Also the /home had a lot of users.
Ant that is not a problem, one has to re-create the users respecting the userid from the previous install …
So far so good …