Ubuntu 10.04.1

After getting a whole new motherboard and screen for Alice, I installed a fresh copy of Lucid Lynx. So here's what has to be done to restore her old self:

- Change the MAC address for the registered one
- Java for Firefox
- Xournal, Gimp
- RSYNC the stuff back
- Nautilus Scripts
- Firefox Preferences, etc.
- Gnome themes, background, etc.

This time I installed a Total Commander like program called DoubleCommander. I'll see where I'll get with it.

Change networking hwaddress under Mac OS X

to be able to use sudo:

$ su MYUSER

to see detailed networking information:

$ ifconfig

to change ethernet hardwer address:

$ sudo ifconfig en0 ether MY:MA:CA:DD:RE:SS

SED in text editing.

Sorry guys for the comments are in Hungarian language, but it was so complicated and I spent the whole day doing it.

The project was about: matching two lines within a file, within a single text file. Actually, it was matching the beginning of following two lines and comparing them. It was a dictionary having separate lines for all the meanings and the point was to put all the meanings in a single line.

# szótárunkban minden szócikk minden jelentése külön sorban volt.
# egy szócikk és egy jelentés kettő darab space karakterrel volt szeparálva, sehol máshol nem volt két space a fájlban.
# feladatunk, hogy egy szócikk összes jelentését egy sorba tegyük, pontosvesszővel elválasztva.
# ez végül így sikerült:
# sed -n 'x; s/\(.*\n\)\(.*$\)/\2/; G; s/\(.* \)\(.*\)\n\1\(.*\)/\1\2\; \3/; h; s/\(.*\n\)\(.*$\)\|\(^.*\)\(; .*$\)/\2\4/w output.txt' input.txt
# mindezek után még ki kellett törölni a felesleges sortöréseket geditben.
# a parancsok kifejtése alább.

sed -n ' # csendes üzemmód.
x; # a pattern-space-be behívott sort felcseréli a hold space-szel
s/\(.*\n\)\(.*$\)/\2/; # az előző cycle-ből megmaradt hold-space-es anyagból leszedi az első sort, ha van, ha nincs, nem csinál semmit.
G; # hozzáírja a most hold-sp-ben levő új sort a most pattern-sp-ben levő régihez egy sortörés után
s/\(.* \)\(.*\)\n\1\(.*\)/\1\2\; \3/; # ha a p-sp-ben levő 2 sor eleje karakterre megyegyezik, akkor a második sorból törli a szócikket és hozzávezeti a jelentéseket az első sorhoz egy pontosvessző és egy space kíséretében. ha nem egyezik meg, akkor marad a 2 sor, nincs törlés.
h; # felülírja a h-space-t az új 1 vagy 2 sorunkkal.
s/\(.*\n\)\(.*$\)\|\(^.*\)\(; .*$\)/\2\4/w output.txt # ha két sor van, a másodikat, ha egy sor van, az utolsó szót pontosvesszűstül és szpészestül belevezeti a megadott text fileban egy új sorba.
' input.txt # ezt a fájlt dolgozzuk fel.

The SED MANUAL was a huge help, thank you!

OGM to AVI with hardcoded subtitles

I was trying to hardcode a subtitle while "-ovc copy". How silly of me. It is only possible to hardcode a subtitle if mencoder has to process the video file frame by frame, as it modifies the pictures when hardcoding.

For whatever reason MEncoder didn't want to work for me recoding a Vorbis audio stream to mp3 with Lame, so two steps were added in between.

#1. Demuxing OGM to separate stream-files
ogmdemux input.ogm

#2. Converting audio track to mp3
soundconverter -b -m audio/mpeg -s .mp3 input.ogm-a1.ogg

#3. Muxing video, audio and subtitle into an avi
mencoder input.ogm-v1.avi -o output.avi -audiofile input.ogm-a1.mp3 -oac copy -ovc lavc -lavcopts vcodec=mpeg4 -sub input.ogm-t1.str

#1-3. Of course at the end I managed to do steps 1-3 in a single step:
mencoder input.ogm -aid 1 -sub input.srt -o output.avi -oac mp3lame -lameopts cbr=128 -ovc lavc -lavcopts vcodec=mpeg4


I guess to achieve the all inclusive #1-3, I had to install some stuff and make mplayer for myself...
sudo apt-get install libasound2-dev libfreetype6-dev zlib1g-dev libmp3lame-dev libfontconfig1-dev libexpat1-dev ogmtools
./configure --enable-theora --enable-libdv --enable-mp3lame --enable-mp3lame-lavc --enable-mp3lib --enable-debug
But of course I don't know what exactly did the trick.

For a better quality it's possible to use extra options, like -ovc lavc -lavcopts vcodec=mpeg4:vbitrate=5000:mbd=2:trell
To get needed value of vbitrate do a mencoder -ovc frameno -o frameno.avi -oac copy input.avi and read your value in the terminal window.

Sources:
Gentoo Forums
MemoryLeak

ImageMagick BMP compression

To make uncompressed BMP files, or to decompress BMP files in ImageMagick, use the -compress none option.

To make less then 24-bit BMP files in ImageMagick, use the -colors 256 option, which would make a 8-bit BMP file.

Use these settings to be able to import scores into Neuratron PhotoScore.

image to pdf

I really can't handle ImageMagick when it comes to pdf files. It creates such huge files they are completely useless.

I tried out another way: pbm -> ps -> pdf:

first I ImageMagick convert pbm-s:
mogrify -format ps -density 300x300 *.pbm
then put them into ps2pdf:
#!/bin/bash
lista=(`find -iname '*.ps' | sort`)
for i in "${lista[@]}"
do
ps2pdf -r300 -g1880x2688 $i $i.pdf
done
and bind them:
pdfjoin *.pdf --outfile output.pdf

It worked brilliantly. This way my pdf is 8 times smaller then my original pdf, and it's only 1.5 times bigger then the djvu I made from the same images.

Djvu was made directly from pbm files, converted with cjb2 and binded with djvm. No special option was used.

Image INFO through ImageMagick

identify -verbose image.jpg

To get only what you want to see you can use GREP like this:

identify -verbose image.ps | egrep "Resolution|Geometry"

This will return you the lines with Resolution and Geometry. Just what I need to make good compressed pdf files with ps2pdf.