Convert other video to FLV
$ ffmpeg -i video.avi -ar 22050 -ab 32 -f flv -s 320×240 video

Download YouTube videos as .flv and convert them to .3gp for your mobile phone.
$ ffmpeg -i file.flv -r 15 -b 128k -s qcif -acodec amr_nb -ar 8000 -ac 1 -ab 13 -f 3gp -y out.3gp

Extract audio and video from a file
$ ffmpeg -i source_movie.flv -vcodec mpeg2video target_video.m2v -acodec copy target_audio.mp3

Convert bunch off oggs to mp3
$ for x in *.ogg; do ffmpeg -i “$x” “`basename “$x” .ogg`.mp3″

AAC conversion
$ ffmpeg -i source.mp3 -acodec libfaac -ab 128k dest.aac
iPod / iPhone
$ ffmpeg -i input -acodec libfaac -ab 128kb -vcodec mpeg4 -b 1200kb -mbd 2 -flags +4mv+trell -aic 2 -cmp 2 -subcmp 2 -s 320×180 -title X output.mp4
convert-almost-any-image-into-a-video
$ ffmpeg -loop_input -f image2 -r 30000/1001 -t $seconds -i frame/$num.ppm -y frame/%02d.mpeg 2>/dev/null

Record MP3 audio via ALSA using ffmpeg
$ ffmpeg -f alsa -ac 2 -i hw:1,0 -acodec libmp3lame -ab 96k output.mp3

Convert files to xvid

$ mencoder “$1″ -ofps 23.976 -ovc lavc -oac copy -o “$1″.avi

Covert wmv to avi
$ mencoder “/path/to/file.wmv” -ofps 23.976 -ovc lavc -oac copy -o “/path/to/file.avi”
Merge video files together using mencoder (part of mplayer)
$ mencoder -oac copy -ovc copy part1.avi part2.avi part3.avi -o full_movie.avi
Encode a file to MPEG4 format
$ mencoder video.avi lavc -lavcopts vcodec=mpeg4:vbitrate=800 newvideo.avi

Convert mp3/wav file to asterisk ulaw for music on hold (moh)
$ sox -v 0.125 -V <mp3.mp3> -t au -r 8000 -U -b -c 1 <ulaw.ulaw> resample -ql

Qimo’s interface has been designed to be intuitive and easy to use, providing large icons for all installed games, so that even the youngest users have no trouble selecting the activity they want.

find out more….

e.g $_POST , $_GET and $_REQUEST .

The library works on defined intrusion patterns which detect a malicious users’ attempts to break your php code and it also allows you to add define your own patterns. This helps to prevent a lot of issues like sql injections, url tempering and others. I have been playing around with it for weeks now and I am impressed with it’s functionality, it’s deninately going to be added into my code base. I would advice that you check it out and see what it can do for you.

Details:
Site     – PHPIDS
Demo     – PHPIDS DEMO
Download – Here

Please remember to read the license before you start using it.

You can install it by compiling from source or in my case I installed it as a rpm (suse 10.3), you can choose which ever method suits you best.

Before you try rdesktop please make sure your windows box is setup to accept remote connections. You can confirm this by accessing control panel->system->remote(tab)->remote desktop and select the checkbox there.

Now Lets begin, We first gonna connect to our windows box with minimal settings…

rdesktop -usonny -pmypass  192.168.1.24

This example will connect to your machine at ip address 192.168.1.24 and will login automatically.

Lets make it full screen
rdesktop -ffull -usonny -pmypass  192.168.1.24

Lets Connect to a windows machine on a domain network
rdesktop -ffull -usonny -pmypass  -dmydomain  192.168.1.24

There are many other settings you can set for e.g. keyboard layout , sound card redirection , clipboard redirection , printer redirection and etc…

This post is meant to be a quick guide on using rdesktop you can find out more information and other config settings by using the man pages

man rdektop

Most ring tones in the market are of mp3 quality(true tone) but it is not easy to download a full track mp3 song on the mobile phone yet, The technology is getting better but it is still very much unstable. An alternative to the mp3 download is to use amr encoding which offers good quality at a small file size, It is not cd quality but it is still decent for the mobile phone. You can offer this as alternative download option to your already mp3 or wma ring tone formats.

With amr you can lower the file size e.g. 3 mega bytes full track(mp3) to 500 kilo bytes full track (amr). The only thing you might have to be careful about would be to check if the particular mobile phone does support amr format first before giving it the file because this can cause problems for you with users complaining about downloads not working. If you do not know how to perform checks on the phone – I would suggest you read my other previous post about achieving this feature – detecting mobile devices on your website .

Lets start converting.
Please Note: This post assumes you have Ffmpeg installed and configured on your machine,if you do not know what I mean please read the Ffmpeg section on the site.

/user/bin/ffmpeg -y -i ring.mp3 -ac 1 -ab 12.2k -ar 8000 -f amr -acodec libamr_nb ring.amr

That is all it takes to get the amr conversion working, you might want to play around with these options -ac 1 -ab 12.2k -ar 8000
until you find the right quality and size for you. Please read about the amr options available for use with Ffmpeg and what values can be or cannot be changed.

That’s it folks, I will try to cover the DRM section next time for those who do not know how to use it.

1. 1C++
2. Dot Net
3. Java
4. Perl
5. Python
6. PHP
7. Ruby

I will be using PHP for all the examples on this post, So I hope you have a little understanding of PHP to go through some of the example code.

Requirements for this Exercise:

• Web server(any will do)
• PHP
• Wurfl(download http://wurfl.sourceforge.net/php/index.php)
• wurfl.xml (download xml file)
• Access to htdocs(web server home directory with write permission)

• At least 50 mega bytes of storage(for the wurfl files to be generated).

Step 1:This step can be set up in different ways, It all depends on how you want to use wurfl on your project, I personally use it on more than one project. To avoid creating a wurfl installation for all my projects I have had to set up a global wurfl installation on my web server which allows all my projects to use one wurfl instance.

create wurfl global

go to /www and create a folder called /www/global and inside global create another directory called /www/global/wurfl. We need to create one last directory inside our /www/global/wurfl/ directory which we are going to call /www/global/wurfl/data, Before we close this step please make sure that your directory /www/global/wurfl/data is writeable

chmod 0777 /www/global/wurfl/data

NB chmod 0777 is not recommended on a production server and one must be careful when granting write permission to files. For the sake of the demonstration we will ignore this rule though.

Your directory structure should look like this: /www/global/wurfl/data

Step 2:
Go to wurfl download page and get the PHP files and store them inside /www/global/wurfl directory http://wurfl.sourceforge.net/php/index.php
you need to also download the http://wurfl.sourceforge.net/wurfl.xml(7mb) which contains all the information about the different types of phones in the market. This file is updated constantly and you need to update it on your side regularly. This file must be copied to /www/global/wurfl/data/wurfl.xml

Step 3:
After you uncompress the downloaded PHP files you should have these following files available:1.

1. check_wurfl.php
2. update_cache.php
3. wurfl_class.php
4. wurfl_config.php
5. wurfl_parser.php
6. readme.txt

Step 4:

Now lets configure our library by opening /www/global/wurfl/wurfl_config.php
lets change the config file as shown below.

Line 90:
NB: Make path absolute

// Where all data is stored (wurfl.xml, cache file, logs, etc) define(”DATADIR”, ‘/www/global/wurfl/data/’);

Line 93:
// Path and filename of wurfl_parser.php define(”WURFL_PARSER_FILE”, ‘/www/global/wurfl/wurfl_parser.php’);

Line 96:
// Path and filename of wurfl_class.php define(”WURFL_CLASS_FILE”, ‘/www/global/wurfl/wurfl_class.php’);

That will do for now. If you are interested in some of the configuration settings on this file you can consult the documentation for the library.

Step 5:
We now need to run /www/global/wurfl/update_cache.php on the console which will create a folder called /global/wurfl/data/multicache that has a lot of files inside of it.

/usr/bin/php -f /www/global/wurfl/update_cache.php

After you run the command it will create the folder mentioned above and a file called /www/global/wurfl/data/cache.php. This command will take a while to execute depending on your machine but will take between 30 to 60 seconds to execute. My /www/global/wurfl/data directory’s size is now 37 mega bytes.

Step 6:
Lets write a little test code which determines if the device on our site is a mobile device and if so we can then redirect the device to the mobile version of our site.

Just like that we now have a script that can tell us whether the user is using a computer web browser or phone browser. If the phone is picked up by our script $myDevice->brand = nokia will carry the phone brand while $myDevice->model = N70. But Please remember that this method is not 100% accurate and also keeping an updated version of /www/global/wurfl/data/wurfl.xml will increase the accuracy rate.

$wurfl_class->capabilities holds an array of the device’s capabilities e.g.
can the device support gif images?

Please try and explore the documentation for the library and you will find all sorts of features. For the sake of keeping this post small I will not show any more examples but rather encourage you to read up a bit on this beautiful library. I hope you find this post useful and you get to do magical stuff with this library , Feel free to leave a comment.