video="$1"
thumb="$2"
-eval $(mplayer -really-quiet -identify -frames 0 -ao null -vo null "$video" 2>/dev/null |sed -rn 's:ID_VIDEO_WIDTH=(.*):width=\1:p;s:ID_VIDEO_HEIGHT=(.*):height=\1:p;s:ID_LENGTH=(.*)(\..*)$:length=\1:p;')
-
-[ -z "$length" -o -z "$width" -o -z "$height" ] && exit 0
-
-if [ "$(($height*1000/$width))" -gt "750" ]; then
- width="$((75*$width/$height))"
- height=75
-else
- height="$((100*$height/$width))"
- width=100
-fi
-[ -z $width ] && width=100
-[ -z $height ] && height=100
-chunk="$(($length / 5))"
-
-for cnt in 1 2 3 4; do
- debug mplayer -nosound -vo jpeg -frames 10 -vf "scale=$width:$height" -ss "$(($cnt*$chunk))" "$video"
- mplayer -nosound -vo jpeg -frames 10 -vf "scale=$width:$height" -ss "$(($cnt*$chunk))" "$video" >/dev/null 2>/dev/null &
- mpid="$!"; watch=0
- while (ps -p "$mpid" >/dev/null 2>/dev/null); do
- [ "$watch" -gt 10 ] && kill -9 "$mpid" || sleep 1
- watch="$(($watch+1))"
+if [ -e "$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}/_${cnt}.jpg"
done
- cp -f 00000009.jpg "${thumb}-${cnt}.jpg" 2>/dev/null
-done
-montage "${thumb}-"[1234]".jpg" -tile 2x2+0+0 -geometry 100x75+3+3 -background "#000000" "${thumb}" 2>/dev/null
-rm 000000[01][0-9].jpg "${thumb}-"[1234]".jpg" 2>/dev/null
-
+ montage "${tmp}"/_[1234].jpg -tile 2x2+0+0 -geometry 100x75+3+3 -background '#000000' "${thumb}"
+ rm -r "${tmp}"
+fi