Image Magick

apt install imagemagick

apt update apt install build-essential apt build-dep imagemagick ./configure but you might need some special parameters (check the installation docs for details on all the configurations available parameters) for ex.: ./configure --with-perl=no --with-magick-plus-plus=no --enable-shared --with-gs-font-dir=/usr/share/fonts/type1/gsfonts --x-includes=/usr/include/X11 --x-libraries=/usr/lib/X11 Now we can proceed with the actual compilation: make and if there are no errors with the installation: make install (this will install the files under /usr/local, since we have not overwritten the default prefix). As a reminder that older software might not compile on newer and modern OSs (compilers, libraries, etc) the compilation fails on recent Debian Etch versions with: png.c: In function 'WriteOneJNGImage': png.c:7639: warning: dereferencing type-punned pointer will break strict-aliasing rules png.c:7705: warning: dereferencing type-punned pointer will break strict-aliasing rules make[1]: [png.lo] Error 1 make[1]: Leaving directory `/usr/local/src/ImageMagick-5.5.7/coders' make: [all-recursive] Error 1 This is caused by newer versions of libpng12, and in order to compile imagemagick successfully I had to install version 1.2.8rel-7 (opposed to the latest version that is currently installed on etch 1.2.13-4)

Once the installation is completed we can verify the version we installed is working fine with:

/usr/local/bin/identify -version Version: ImageMagick 5.5.7 12/21/06 Q16 Copyright: Copyright (C) 2003 ImageMagick Studio LLC


/usr/local/bin/convert -version Version: ImageMagick 5.5.7 12/21/06 Q16 Copyright: Copyright (C) 2003 ImageMagick Studio LLC and to get the listing of which image formats are supported on our system: identify -list format Format Mode Description 8BIM rw- Photoshop resource format 8BIMTEXT rw- Photoshop resource text format 8BIMWTEXT rw- Photoshop resource wide text format APP1 rw- Raw application information APP1JPEG* rw- Raw JPEG binary data

convert picture.png picture.jpg


apt install jmagick Download source from :

cp /usr/lib scp /usr/lib/ root@ OR apt install jmagick ??? => from apt !?! cp /usr/lib/jni/ /usr/lib


  • MPG > MP3: ffmpeg -i video.flv -acodec copy audio.mp3
  • MPG > OGG: ffmpeg -i 1.mp4 -acodec libvorbis -vcodec libtheora -f ogg output.ogg
  • MPG > FLV; ffmpeg -i video.mpg -ar 22050 -ab 32 -f flv -s 320x240 -aspect 4:3 -y video.flv
  • AVI > FLV: ffmpeg -i video.avi -acodec mp3 -ar 22050 -ab 32 -f flv -s 320x240 video.flv
  • FLV Metadata: flvtool2 -U video.flv
  • Thumbnail: ffmpeg -y -i video.mpg -vframes 1 -ss 00:00:02 -an -vcodec png -f rawvideo -s 320x240 video.jpg
  • Play: ffplay video.flv

  • mp4 > animated gif ffmpeg -i video.mp4 -r 5 'frames/frame-%03d.jpg'

    -r 5 stands for FPS value, for better quality choose bigger number

    %03d gives sequential filename number in decimal form

    cd frames convert -delay 20 -loop 0 *.jpg myimage.gif

screenrecorder: ffmpeg -y -f alsa -ac 2 -i pulse -f x11grab -r 25 -s 1920x1080 -i :0.0 -vcodec libx264 -vpre lossless_ultrafast -crf 22 -acodec libmp3lame -ar 44100 -ab 126k -threads 3 ~/Desktop/screencast.mkv

Add in /etc/apt/sources.list

deb feisty free non-free deb-src feisty free non-free

apt update apt install ffmpeg apt install libavcodec0d ? apt install w32codecs ? apt install libavformat0d ? apt install libpostproc0d ? apt install mpg123 ? apt install avifile-mjpeg-plugin ? apt install libavifile-0.7c2 ? apt install libswfdec0.3 ?

ffmpeg is a multiplatform, open-source library for video and audio files. I have compiled 19 useful and amazing commands covering almost all needs: video conversion, sound extraction, encoding file for iPod or PSP, and more.

Getting infos from a video file ffmpeg -i video.avi

Turn X images to a video sequence ffmpeg -f image2 -i image%d.jpg video.mpg

This command will transform all the images from the current directory (named image1.jpg, image2.jpg, etc…) to a video file named video.mpg.

Turn a video to X images ffmpeg -i video.mpg image%d.jpg

This command will generate the files named image1.jpg, image2.jpg, … The following image formats are also availables : PGM, PPM, PAM, PGMYUV, JPEG, GIF, PNG, TIFF, SGI. Encode a video sequence for the iPpod/iPhone ffmpeg -i source_video.avi input -acodec aac -ab 128kb -vcodec mpeg4 -b 1200kb -mbd 2 -flags +4mv+trell -aic 2 -cmp 2 -subcmp 2 -s 320x180 -title X final_video.mp4

Explanations : Source : source_video.avi Audio codec : aac Audio bitrate : 128kb/s Video codec : mpeg4 Video bitrate : 1200kb/s Video size : 320px par 180px Generated video : final_video.mp4

Encode video for the PSP

ffmpeg -i source_video.avi -b 300 -s 320x240 -vcodec xvid -ab 32 -ar 24000 -acodec aac final_video.mp4

Explanations : Source : source_video.avi Audio codec : aac Audio bitrate : 32kb/s Video codec : xvid Video bitrate : 1200kb/s Video size : 320px par 180px Generated video : final_video.mp4

Extracting sound from a video, and save it as Mp3

ffmpeg -i source_video.avi -vn -ar 44100 -ac 2 -ab 192 -f mp3 pom.xmlsound.mp3

Explanations : Source video : source_video.avi Audio bitrate : 192kb/s output format : mp3 Generated sound : sound.mp3

Convert a wav file to Mp3

ffmpeg -i son_origine.avi -vn -ar 44100 -ac 2 -ab 192 -f mp3 son_final.mp3

Convert .avi video to .mpg ffmpeg -i video_origine.avi video_finale.mpg

Convert .mpg to .avi ffmpeg -i video_origine.mpg video_finale.avi

Convert .avi to animated gif(uncompressed) ffmpeg -i video_origine.avi gif_anime.gif

Mix a video with a sound file ffmpeg -i son.wav -i video_origine.avi video_finale.mpg

Convert .avi to .flv ffmpeg -i video_origine.avi -ab 56 -ar 44100 -b 200 -r 15 -s 320x240 -f flv video_finale.flv

Convert .avi to dv ffmpeg -i video_origine.avi -s pal -r pal -aspect 4:3 -ar 48000 -ac 2 video_finale.dv

Or: ffmpeg -i video_origine.avi -target pal-dv video_finale.dv

Convert .avi to mpeg for dvd players ffmpeg -i source_video.avi -target pal-dvd -ps 2000000000 -aspect 16:9 finale_video.mpeg

Explanations : target pal-dvd : Output format ps 2000000000 maximum size for the output file, in bits (here, 2 Gb) aspect 16:9 : Widescreen

Compress .avi to divx ffmpeg -i video_origine.avi -s 320x240 -vcodec msmpeg4v2 video_finale.avi

Compress Ogg Theora to Mpeg dvd ffmpeg -i film_sortie_cinelerra.ogm -s 720x576 -vcodec mpeg2video -acodec mp3 film_terminée.mpg

Compress .avi to SVCD mpeg2

NTSC format: ffmpeg -i video_origine.avi -target ntsc-svcd video_finale.mpg

PAL format: ffmpeg -i video_origine.avi -target pal-svcd video_finale.mpg

Compress .avi to VCD mpeg2

NTSC format: ffmpeg -i video_origine.avi -target ntsc-vcd video_finale.mpg

PAL format: ffmpeg -i video_origine.avi -target pal-vcd video_finale.mpg

Multi-pass encoding with ffmpeg ffmpeg -i fichierentree -pass 2 -passlogfile ffmpeg2pass fichiersortie-2


for i in *.m4a; do faad "$i" x=echo "$i" | sed -e 's/.m4a/.wav/' y=echo "$i" | sed -e 's/.m4a/.mp3/' lame -h -b 192 "$x" "$y" rm "$x" done


for i in *.mp4; do ffmpeg -i "$i" -f mp3 -ab 192000 -vn "$i".mp3 done ffmpeg -i 1.mp4 -f mp3 -ab 192000 -vn 1.mp3


apt install ruby download from Untar it and execute the following commands inside the untared directory: ruby setup.rb config ruby setup.rb setup sudo ruby setup.rb install You can then use flvtool2 as a shell command.


  • features
  • classification
  • search on google for "contour detection" and "patche detection"


soffice -headless -accept="socket,port=8100;urp"
soffice -accept="socket,host=,port=8100;urp;OpenOffice.ServiceManager" -norestore -headless -invisible
soffice -accept=socket,host=localhost,port=8100;urp;
apt build-dep
apt install x-window-system-core
apt install gnome-desktop-environment
apt install gdm
apt-cache search openoffice*
apt remove openoffice*
sudo apt remove --purge
sudo apt remove --purge
sudo apt remove --purge
sudo apt remove --purge
sudo apt remove --purge
sudo apt remove --purge
sudo apt remove --purge*
sudo apt remove --purge
sudo apt remove --purge
sudo apt install fakeroot alien
tar zxvf OOo_2.0.0_LinuxIntel_install.tar.gz
cd OOO680_m3_native_packed-2_en-US.8968/RPMS/
fakeroot alien -d *.rpm
dpkg -i *.deb
cd desktop-integration/
sudo dpkg -i
apt source
apt build-dep (to install build dependencies)
   [ somehow broken yet probably because of the various |'s ]
cd <source directory>
dpkg-deb  -c
dpkg -i *.deb

POI Scala

import info.folone.scala.poi._
import scalaz._
import syntax.monoid._
import syntax.foldable._
import std.list._
val sheetOne = Workbook {
   Set(Sheet("name") {
     Set(Row(1) {
       Set(NumericCell(1, 13.0/5), FormulaCell(2, "ABS(A1)"))
     Row(2) {
       Set(StringCell(1, "data"), StringCell(2, "data2"))
   Sheet("name2") {
     Set(Row(2) {
       Set(BooleanCell(1, true), NumericCell(2, 2.4))
val path = "/tmp/workbook.xls"

sheetOne.safeToFile(path).fold(ex ⇒ throw ex, identity).unsafePerformIO

val sheetTwo = Workbook {
        Set(Sheet("name") {
          Set(Row(1) {
            Set(StringCell(1, "newdata"), StringCell(2, "data2"), StringCell(3, "data3"))
          Row(2) {
            Set(StringCell(1, "data"), StringCell(2, "data2"))
          Row(3) {
            Set(StringCell(1, "data"), StringCell(2, "data2"))
        Sheet("name") {
          Set(Row(2) {
            Set(StringCell(1, "data"), StringCell(2, "data2"))

import syntax.equal._
import syntax.equal._
val res = Workbook(path).fold(
  ex       => false,
  workbook => (workbook |+| sheetTwo) === (sheetOne |+| sheetTwo)
res: scalaz.effect.IO[Boolean] = scalaz.effect.IOFunctions$$anon$5@7ad4ad93


import impure._


val mergeSheets = sheetOne |+| sheetTwo

val sheetOneReloaded = load(path)

val mergeSheets2 = sheetOneReloaded |+| sheetTwo

mergeSheets == mergeSheets2

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