video="$1"
thumb="$2"
-exec >/dev/null 2>/dev/null
-mplayer -really-quiet -identify -frames 0 -nosound -vo null "$video" \
-| sed -rn 's:ID_VIDEO_WIDTH=(.*):\1:p;
- s:ID_VIDEO_HEIGHT=(.*):\1:p;
- s:ID_LENGTH=(.*)(\..*)$:\1:p;' \
-| tr '\n' ' ' \
-| read width height length
-
-[ -z "$length" -o -z "$width" -o -z "$height" ] && exit 0
-
-[ "$(($height*1000/$width))" -gt "750" ] && width="$((75*$width/$height))" \
- || width=100
-[ -z $width ] && width=100
-chunk="$(($length / 5))"
-
-tmp="$(mktemp -d)"
-
-for cnt in 1 2 3 4; do
- mplayer -nosound -vo jpeg:outdir="$tmp" -frames 1 -benchmark -vf framestep=I,scale="$width":-2 -ss "$(($cnt*$chunk))" "$video" &
- mpid="$!"; for watch in {1..10}; do
- ps -p "$mpid" && sleep 1
+if [ -e "$video" -a \! -e "$thumb" ]; then
+ mplayer --input=nodefault-bindings:conf=/dev/null -nosound -vo null -frames 0 -identify "$video" \
+ | sort \
+ | sed -rn 's:ID_LENGTH=(.*)(\..*)$:\1:p;
+ s:ID_VIDEO_HEIGHT=(.*):\1:p;
+ s:ID_VIDEO_WIDTH=(.*):\1:p;' \
+ | tr '\n' ' ' \
+ | read length height width
+
+ [ "$(($height*1000/$width))" -gt "750" ] && width="$((75*$width/$height))" \
+ || width=100
+ [ -z $width ] && width=100
+ chunk="$((${length:-0} / 5))"
+
+ tmp="$(mktemp -d)"
+ for cnt in 1 2 3 4; do
+ mplayer --input=nodefault-bindings:conf=/dev/null -nosound -vo jpeg:outdir="$tmp" -frames 1 \
+ --benchmark -vf framestep=I,scale="$width":-2 -ss "$(($cnt*$chunk))" "$video"
+ mv "$tmp/00000001.jpg" "${tmp}/_${cnt}.jpg"
done
- ps -p "$mpid" && kill -9 "$mpid"
- mv "$tmp/00000001.jpg" "${tmp}/${thumb}-${cnt}.jpg"
-done
-montage "${tmp}/${thumb}"-[1234].jpg -tile 2x2+0+0 -geometry 100x75+3+3 -background '#000000' "${thumb}"
-rm -r "${tmp}"
-
+ montage "${tmp}"/_[1234].jpg -tile 2x2+0+0 -geometry 100x75+3+3 -background '#000000' "${thumb}"
+ rm -r "${tmp}"
+fi