[Thunar-dev] how to disable thumbnails

[hernux]

Hi,

is there any way to disable the auto generation of thumbnails for movies?
I think that a thumbnail for a movie is very useless, specially if the 
program takes the first frame, as it's always a blank screen or a 
picture that doesn't identify the movie itself, so, thumnails are all 
the same, and it takes too much time to create them.  When I open a 
folder with ten or more movies, it takes several minutes to it, to 
create the thumbs.. during that time, the screen reloads every while, 
and I can't even rename a file, as it exits edit mode before reloading 
the screen.

any way, is there a way to disable this option? or where can I change 
the list of file types / mime types that thunar is generating thumbs (I 
mean, if its handcoded).

Thanx,
Hernux