[linux] Create video thumbnails for all video in a specific folder

[Snell]

If you want to add other video extension

add the following code at the end and replace mpeg with your desired video extension (it must be supported by totem)

for video in "$1"/*.mpeg;
do
file=${video##*/}
wext=${file%%.*}
totem-video-thumbnailer -g 18 -s 200 "$video" "$wext".png
done 

Yes, you can have the output to jpeg or jpg

by changing all png throughout the script by jpeg or jpg

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If you want to reduce the file size, change 200 (which is the width of each thumbnail) and 18 (which is the number of thumbnail to be taken) to a lower value