This is a simple bash script to create DMG under Finder.

for f in “$@” do b=$(basename “$f”) d=$(dirname “$f”) hdiutil create -format UDZO -srcfolder “$f” “$d/$b.dmg” done

You can use this simple script combined with Automator such that you can create disk image files by selecting files or directories and using the Automator context menu in Finder.

Automator setup

Usage:

Tags: hacking, programming

Just a memo for myself.

With mencoder, mplayer, ffmpeg and mp4box, I can finally reduce the size of the video files created from my Canon A620 to reasonable sizes such I can put them in my powerbook without depleting the hard drive space.

This is the script for converting AVI to mp4,

mencoder $1 \
-ovc x264 -nosound -ni -sws 0 -x264encopts \
threads=1:me=2:qp_min=22:\
qp_max=51:i4x4:keyint=120:nocabac:deblock:nob_adapt \
-ofps 29.97 -vop harddup -of rawvideo \
-o $1.264

mplayer -vc dummy -vo null -ao pcm:file=$1.wav $1

ffmpeg -i $1.264 -i $1.wav -y -vn -f mp4 -acodec aac \
-ab 96 -ar 11025 -ac 2 -map 1.0:0.0 $1.aac.mp4

MP4Box -fps 29.97 -add $1.264 -add $1.aac.mp4 -new $1.mp4

rm $1.wav
rm $1.264
rm $1.aac.mp4
touch -r $1 $1.mp4

For convert DV to mp4, I use

ffmpeg -i $1 -y -vcodec h264 -f mp4 -acodec aac \
-deinterlace -b 1280 -aspect 4:3 -s 640x480 -naq \
-parti4x4 -deblock -copyts -keyint_min 120 -h264 1 \
-mv4 1 -bf 2 -coder 1 -parti4x4 -partp4x4 -parti8x8 \
partp8x8 $1.mp4touch -r $1 $1.mp4

The results seem pretty reasonable good, while the sizes are still under control.

Tags: hacking, programming

In the recent OS X 10.4.3, it is possible to “suspend” my powerbook into hibernate mode that does not use any power (see Andrew’s Blog). I write this simple script “sleepmode” to make life slightly easier with this feature.

#!/bin/sh
case ”$1” in
  deep)
    sudo pmset -a hibernatemode 1
  ;;
  safe)
    sudo pmset -a hibernatemode 3
  ;;
  normal)
    sudo pmset -a hibernatemode 0
  ;;
  go)
    omode=”`pmset -g | grep hibernatemode | cut -f 2`”
    sudo pmset -a hibernatemode 1
    echo The system is going to the deep sleep in 3 seconds
    sleep 3
    osascript -e 'tell application "Finder" to sleep'
    sudo pmset -a hibernatemode $omode
    echo The system is back to it orginal sleep mode
  ;;
esac

case ”`pmset -g | grep hibernatemode | cut -f 2`” in
  0)
  echo System is in the Normal Sleep Mode
  ;;
  1)
  echo System is in the Deep Sleep Mode
  ;;
  3)
  echo System is in the Safe Sleep Mode
  ;;
esac

Tags: hacking, programming