I switched from GNOME to XFCE some time back. I was unable to figure out how to make thumbnails work for video files. I tried adjusting a few things, installed things that looked vaguely like they might help... But basically groped around in the dark until I gave up & installed PCFileMan (every week or so I'd run it, navigate to each of my directories, and exit the app - and, as all files then had thumbnail images, Thunar would display them, lol). "A bit" unwieldy, but it worked.
I was quite happy when later updates meant that Thunar started crating thumbnail images. So happy that I forgot about asking this for a while:
When I used GNOME, its file manager also provided audio "thumbnails" (probably incorrect term); whenever I would hover my mouse cursor over an audio file (icon) that was in a format that my system had the correct codecs to play, GNOME's file manager would start playing the audio. When I moved my cursor away, the audio would stop.
Can this currently be done somehow in XFCE? If so, how does one configure it? If not, I would like to request it... If more people are interested in the feature than just myself. Tips on presenting my request might be helpful; for example, would the developers know about this or would I have to find a webpage that explains how it works in GNOME's file manager and reference it when submitting such a request?
I think the closest you're going to be able to get is a custom action - but that won't be activated by a hover, but rather with a right-click and selection. The hover aspect will need to be programmed in. However, there is this patch. Doesn't look like its been implemented though.
Bummer. And I suppose that if it wouldn't be activated with a hover, it wouldn't be deactivated by the cessation of, er, a hover.
So at this point, it'd be both easier and more sensible to double-click on a file and let whichever app it is that the system currently has assigned to the role of audio file player deal with it. Shame.
I wonder how Nautilus manages it? If it does it natively or if it uses one or more helper files?
I haven't used GNOME's file manager since they were still doing GNOME 2.x. Probably pull in a lot of other files, tax an already overtaxed system, and not integrate well.