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I believe that gnome-video-thumbnailer ought to be smarter about timing
the creation and updates of thumbnails. The slow copying issue (such as
to/from a slow medium, or a bittorrent) means that if nautilus is
viewing a folder with even one video that is being actively written, the
CPU usage will go up until the file stops changing.
I believe gnome-video-thumbnailer should be aware of if other processes
are actively writing files it's asked to process. If they are, then
don't thumbnail them as they'll likely change in 10 seconds anyway ...
If it's not possible to monitor other processes in this way (is there an
API or some kernel function that gives this information?) then the logic
should not dictate an instantaneous update. I'd say wait *at least* 30
or 60 seconds to update a thumbnail, but would suggest something closer
300 seconds or more.
I believe this report is very similar to these bugs, but I still see the
issue and these three are all closed or "Fixed".
Bug #8329 "Nautilus is showing previews while copying"
Bug #23034 "totem-video-thumbnailer shouldn't update thumbnail every second"
Bug #40874 "Thumbnail settings don't work as expected"
As the decision for Bug #40874 hinged on the size, let me reiterate that
the issue is one of *timing*, not size.
** Affects: totem (Ubuntu)
Importance: Undecided
Status: New
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video thumbnailer uses too many resources.
https://bugs.launchpad.net/bugs/370615
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