My Heard Space

I keep a list of all the FFmpeg / Mencoder command that I come across on the Internet and add it to my Knotes for future refernce, Today I am sharing the list. The credit goes to all the website and forums which I have come across to build this nice little list of FFmpeg / Mencoder commands.
Capture video of a linux desktop
$ ffmpeg -f x11grab -s wxga -r 25 -i :0.0 -sameq /tmp/out

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

I got a couple of emails a while ago about  people who were interested in creating ring tones for the  iPhone, Well since I do not own an iPhone or have any intentions of having one I have instead found a nice little how to guide for those interested in the subject …..read more.

The PHP library expands on the great work done in the PHP Excel Reader project on SourceForge. It reads the binary format of XLS files directly and can return values and formats from any cell. I have only played around with it for an hour , but for anyone who is working with php and excel you will find it very useful. Well what are you waiting for Get started now.

Qimo is a desktop operating system designed for kids. Based on the open source Ubuntu Linux desktop, Qimo comes pre-installed with educational games for children aged 3 and up.

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….

I came across this about a month ago, It’s a php library that helps you do sanity checks on user input variables

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.