From a239b304b2c9c58b9efc1990033fae701785c023 Mon Sep 17 00:00:00 2001
From: paul <paul@plutz.net>
Date: Fri, 7 Aug 2015 00:02:27 +0000
Subject: [PATCH] work in a tmp directory to allow multiple instances

svn path=/trunk/; revision=78
---
 helpers/genthumb.sh | 36 ++++++++++++++++++------------------
 1 file changed, 18 insertions(+), 18 deletions(-)

diff --git a/helpers/genthumb.sh b/helpers/genthumb.sh
index 625b729..30179b6 100755
--- a/helpers/genthumb.sh
+++ b/helpers/genthumb.sh
@@ -2,32 +2,32 @@
 
 video="$1"
 thumb="$2"
+exec >/dev/null 2>/dev/null
 
-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=(.*)(\..*)$:length=\1:p;')
+mplayer -really-quiet -identify -frames 0 -nosound -vo null "$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
 
-if [ "$(($height*1000/$width))" -gt "750" ]; then
-  width="$((75*$width/$height))"
-  height=75
-else
-  height="$((100*$height/$width))"
-  width=100
-fi
+[ "$(($height*1000/$width))" -gt "750" ] && width="$((75*$width/$height))" \
+                                         || width=100
 [ -z $width ] && width=100
-[ -z $height ] && height=100
 chunk="$(($length / 5))"
 
+tmp="$(mktemp -d)"
+
 for cnt in 1 2 3 4; do
-  debug mplayer -nosound -vo jpeg -frames 10 -vf "scale=$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 "$mpid" || sleep 1
-      watch="$(($watch+1))"
+  mplayer -nosound -vo jpeg:outdir="$tmp" -frames 1 -benchmark -vf framestep=I,scale="$width":-2 -ss "$(($cnt*$chunk))" "$video" &
+  mpid="$!"; for watch in {1..10}; do
+    ps -p "$mpid" && sleep 1
   done
-  cp -f 00000009.jpg "${thumb}-${cnt}.jpg" 2>/dev/null
+  ps -p "$mpid" && kill -9 "$mpid"
+  mv "$tmp/00000001.jpg" "${tmp}/${thumb}-${cnt}.jpg"
 done
-montage "${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 "${tmp}/${thumb}"-[1234].jpg -tile 2x2+0+0 -geometry 100x75+3+3 -background '#000000' "${thumb}"
+rm -r "${tmp}"
 
-- 
2.39.2