quicker thumbnail generation using ffmpeg

[serve0] / thumbnail.sh

diff --git a/thumbnail.sh b/thumbnail.sh
index 4e3fd3fb6298c4fcecef63f362d8edd7290a2ba2..0940a5e0cbd5a58f37dc3a200cc07514cfcfec75 100644 (file)
--- a/thumbnail.sh
+++ b/thumbnail.sh
@@ -1,44 +1,21 @@
 #!/bin/sh
 
-# Use: $index $thumb $file_pattern
+[ -n "$include_thumbnails" ] && return 0
+include_thumbnails="$0"
 
-if [ \! -e "$thumb" ] && { printf %s "$file" |grep -qE "$file_pattern"; }; then
-  read l h w <<__EOF
-  $(printf '' \
-    | mplayer -input nodefault-bindings -nosound -vo null -identify -frames 0 "$file" 2>&- \
-    | sort | sed -rn '
-      s:ID_LENGTH=(.*)(\..*)$:\1:p;
-      s:ID_VIDEO_HEIGHT=(.*):\1:p;
-      s:ID_VIDEO_WIDTH=(.*):\1:p;' \
-    | tr '\n' ' '
-  )
-__EOF
+gen_thumb(){
+  local file="$1" thumb="$2" tmp="${TMPDIR:-/tmp}/serve0tmp_$$/" lenght
 
-  [ "$((h * 1000 / w))" -gt "750" ] \
-  && w="$((75 * w / h))" || w=100
-  chunk="$((${l:-10} / 5))"
+  if [ "${file%.part}" = "${file}" -a ! -s "$thumb" -a -s "$file" ] && mkdir "$tmp"; then
+    length="$(
+      ffprobe -show_entries stream=duration "$file" 2>&- \
+      | sed -nE 's;duration=([0-9\.]+)\r?$;\1;p;'
+    )"
   
-  tmp="$(mktemp -d)"
-  for cnt in 1 2 3 4; do
-    printf '' \
-    | mplayer -input nodefault-bindings -nosound -benchmark \
-              -noconfig all -really-quiet \
-              -frames 1 -ss "$((cnt * chunk))" \
-              -vf "framestep=I,scale=${w}:-2" \
-              -vo "jpeg:quality=100:outdir=${tmp}" \
-              "$file" 2>&-
-    mv "${tmp}/00000001.jpg" "${tmp}/_${cnt}.jpg"
-  done
-  printf '' \
-  | mplayer -input nodefault-bindings -nosound -benchmark \
-            -noconfig all -really-quiet \
-            -vf scale=159:-2,tile=2:2:4:0:2 \
-            -vo "jpeg:quality=96:outdir=${tmp}"\
-            "mf://$tmp/_*.jpg" 2>&-
-
-  mv "${tmp}/00000001.jpg" "$thumb"
-  rm -r "${tmp}"
-
-elif [ \! -e "$thumb" ]; then
-  touch "$thumb"
-fi
+    ffmpeg -nostdin -y -i "$file" -vf scale=320:-2,fps=10/$length "$tmp/thumb_%02d.jpg" 2>&-
+    montage "$tmp/thumb_0"[1-9].jpg "$tmp/thumb_10.jpg" \
+            -tile 10x1 -geometry 320x180+0+0 \
+            -interlace line -quality 85 "$thumb"
+    rm -r -- "${tmp}"
+  fi
+}