Add gource visualisation generation script

This script can be used to generate gource visualisation mpeg
files. The visualisation looks pretty and goes down well at trade
shows as a background on the video projector.

Docs/gource.sh

@@ -0,0 +1,72 @@
+#!/bin/bash
+#
+# This script generates a gource visualisation with some parameters.
+#
+# you need a recent gource and ffmpeg install for this to work
+
+# Settings
+
+TITLE="Netsurf"
+
+# length and quality
+TYPE="sml" # sml, std, lrg
+
+#Camera mode
+CMODE=overview # overview, track
+
+# standard monitor (suitable for video projector playback)
+OUTPUT_SIZE="1024x768"
+
+# HD widescreen 720p
+#OUTPUT_SIZE="1280x720"
+
+# HD widescreen 1080p
+#OUTPUT_SIZE="1280x1080"
+
+
+######################################################################
+
+#quality parameters
+case ${TYPE} in
+    "std")
+    # standard overview
+    QPARAM="-s 0.25 -i 600 -a 1"
+    ;;
+  
+    "lrg"
+    # large overview
+    QPARAM="-s 0.5 -i 200 -a 5"
+    ;;
+
+    "sml"
+    # rapid overview (3mins)
+    QPARAM="-s 0.04 -i 30 -a 1"
+    ;;
+
+    *)
+    # bad type
+    echo "bad type"
+    exit 1
+    ;;
+
+esac
+
+# filename
+FILENAME=${TITLE}-gource-${TYPE}-${OUTPUT_SIZE}-${CMODE}.mp4
+
+# filter some directories which are not interesting
+FILEFILTER="\!NetSurf/|riscos/distribution/|gtk/res/|framebuffer/res/|amiga/resources/|beos/res/|cocoa/res/|windows/res/|atari/res"
+
+#gource -1280x720 -s 0.04 -i 30 -a 1 --highlight-all-users --output-framerate 25 --hide filenames --disable-progress --stop-at-end --date-format "%d %B %Y" --bloom-intensity 0.2 --file-filter '/art/' --file-filter '/changemailer/' --file-filter '/libnspng/' --file-filter '/libnsbmp/examples/' --file-filter '/netsurfweb/' --file-filter '/netsurfbuild/' --file-filter '/netsurftest/' --file-filter '/hubbub/test/' --file-filter '/dom/test/'  --file-filter '/iconv/' --file-filter '/libharu/' --camera-mode track --output-ppm-stream - > temp.ppm
+
+#gource -1280x720 -s 0.04 -i 30 -a 1 --bloom-multiplier 0.10 --bloom-intensity 0.5 --title "Netsurf" --highlight-all-users --output-framerate 25 --hide filenames --stop-at-end --date-format "%d %B %Y" --bloom-intensity 0.2 --file-filter '/art/' --file-filter '/changemailer/' --file-filter '/libnspng/' --file-filter '/libnsbmp/examples/' --file-filter '/netsurfweb/' --file-filter '/netsurfbuild/' --file-filter '/netsurftest/' --file-filter '/hubbub/test/' --file-filter '/dom/test/'  --file-filter '/iconv/' --file-filter '/libharu/' --camera-mode track --output-ppm-stream - > temp.ppm
+
+#gource -stop-at-end --key 5C--title "NetSurf Development" --highlight-users --max-file-lag -1 -f -1280x720 --seconds-per-day 0.06 --hide mouse,progress,filenames --file-idle-time 20 --disable-bloom --date-format "%e %b %Y" -o - | ffmpeg -y -r 60 -f image2pipe -vcodec ppm -i - -vcodec libx264 -preset veryslow -crf 1 -threads 0 -bf 0 gource.mp4
+
+# generate
+gource 5C--title "NetSurf Development" -${OUTPUT_SIZE} ${QPARAM} --max-files 10000 --bloom-multiplier 0.10 --bloom-intensity 0.5 --title ${TITLE} --highlight-all-users --output-framerate 25 --hide filenames --stop-at-end --date-format "%d %B %Y" --bloom-intensity 0.2 --file-filter "${FILEFILTER}" --key --camera-mode ${CMODE} --output-ppm-stream - > temp.ppm
+
+#convert the ppm to movie
+cat temp.ppm | ffmpeg -y -b 2000K -r 25 -f image2pipe -vcodec ppm -i - -vcodec libx264 ${FILENAME}
+
+