Posts Tagged ‘topic’

Best software available today for Linux video Desktop capturing on Debian

Tuesday, April 19th, 2011

I’ve been experimenting since some time in order to understand better what is the current situation with Video Desktop Capturing Software available today for Linux and FreeBSD.

My previous investigations has led me to write an article about xvidcap called How to make Video from your Linux Desktop with xvidcap

Though xvidcap works pretty well, it is currently uncapable of capturing the audio stream of a Linux Desktop env and hence part of the interactivity of the videos is missing when used.

A bit of further investigation on the topic has pointed me to 3 free software programs which are capable to record Desktop environment on Linux with sound embedded

The interesting screen video capturing Desktop tools I’ve found are:

1. recordMyDesktop
2. Istanbul
and
3. vnc2swf

Installing them on a Debian based distribution is pleasable, as there are installable debian packages of each one which I installed easily with apt:

debian:~# apt-get install istanbul recordmydesktop gtk-recordmydesktop vnc2swf

RecordMyDesktop‘s package contains a command line little tool which when started directly starts capturing video and audio of the Linux Desktop. After a Ctrl+C is pressed the program quits, saves and encodes the video in ogg-encapsulated theora-vorbis file format.

Here is the output I got in saving a sample file by launching recordmydesktop without any arguments:

hipo@debian:~/Desktop$ recordmydesktop
Initial recording window is set to:
X:0 Y:0 Width:1024 Height:768
Adjusted recording window is set to:
X:0 Y:0 Width:1024 Height:768
Your window manager appears to be Metacity

Initializing…
Buffer size adjusted to 4096 from 4096 frames.
Opened PCM device hw:0,0
Recording on device hw:0,0 is set to:
2 channels at 22050Hz
Capturing!
Broken pipe: Overrun occurred.
Broken pipe: Overrun occurred.
Broken pipe: Overrun occurred.
^C
*********************************************

Cached 5 MB, from 207 MB that were received.
Average cache compression ratio: 97.3 %

*********************************************
Saved 69 frames in a total of 69 requests
Shutting down..Broken pipe: Overrun occurred.

STATE:ENCODING
Encoding started!
This may take several minutes.
Pressing Ctrl-C will cancel the procedure (resuming will not be possible, but
any portion of the video, which is already encoded won’t be deleted).
Please wait…
Output file: out.ogv
[100%]
Encoding finished!
Wait a moment please…

Done.
Written 692529 bytes
(635547 of which were video data and 56982 audio data)

Cleanning up cache…
Done!!!
Goodbye!

The captured file as I you see in the above output is saved in file out.ogv

RecordMyDesktop has also a GUI interface (written in Python) called gtk-recordmydesktop

Below you see a screenshot of the GUI gtk-recordmydesktop:

RecordMyDesktop GTK interface entry screen

gtk-recordmydesktop is a super-easy to use as you already see in the picture, you can either configure it with Advanced button or use Save As button to select where you want the Desktop captured video and audio to be stored.

In Debian Squeeze 6.0, the Advanced GUI button interface button is not working but that’s not such an issue, as the rest of the buttons works fine.
After the recordmydesktop‘s Record button is pressed it will start capturing from your Desktop and the window seen in the above screenshot will disappear/hide in the system tray:

recordmydesktop recording minimized in system tray
When you press over the white little square in the system tray the screen capturing will be interrupted and a window will pop-up informing you that the captured video and audio is being encoded, here is another screenshot of recordmydesktop encoding a saved Desktop video stream:

recordmydesktop saving captured desktop video

After the final .ogv file is encoded and saved to further transfer it into (.flv) I used ffmpeg;

debian:~# ffmpeg -i test.ogv test.flv
...

Now let’s evaluate a bit on the the final results, the produced test.ogv‘s synchronization between sound and video was not good as the sound was starting earlier than the video and therefore even though recordmydesktop used to be highly praised on the net, the proggie developers still needs to do some bug fixing
Further on, I continued and (gave the other Desktop screen capturer) Istanbul a try hoping that at least with it the video and audio of my Linux desktop will be properly captured. But guess what, the results with Istanbul was even more unsatisfactory as the produced videos and sounds, were slow and a lot of frames from the screens were missing completely.
Moreover the sound which was supposed to accompany the video was completely 🙁

Thus I will skip on talking about Istanbul as in my view, this piece of software is far away from being production ready.

I also tested vnc2swf , launched it by: pressing alt+f2 and typing in vnc2swf in GNOME’s run application prompt, just to be surprised by an error …:

vnc2swf error no 111 Connection refused

The reason for this error is caused by the xserver (Xorg) port 5900 is being closed by default on Debian

However this error is easily solvable, by making the Xserver to listen to a the port 5900, to make the Xorg server on Debian to listen on this port you need to edit the file:

/etc/X11/xinit/xserverrc

and change inside it:

exec /usr/bin/X -nolisten tcp "$@"

with:

exec /usr/bin/X "$@"

and either reboot your Linux or restart only the Xorg server by pressing Ctrl+Alt+BackSpace

Now let me conclude, the results from my desktop video screen capturing experiments prooved that vnc2swf is superior (as it is capable of properly saving a movie with sound and video from a Linux Desktop). It appears this soft is actually the best one you can use to make a video of your Linux desktop.

Sadly my testing has proven that Linux is still lacking behind Windows and Mac in even doing the most simple tasks …
Let’s hope that situation will get better soon and Gnome or KDE developers will soon provide us with better software capable to save properly a video and audio captured from the Linux Desktop.

Few websites to check how anonymous you are on the Internet

Monday, April 11th, 2011

A friend of mine has recommended, few websites which are quite useful in checking what kind of information a remote website could possibly retrieve about your system. I’ve found quite useful as they expose the high level of browser security there is nowdays even on a Linux based systems.
I’ve been stunned that so many information about my Linux desktop could be mined even when I use my browser through a tor network.

Here are the websites you might also like to check and possibly afterwards improve your Browser security:

http://anon.inf.tu-dresden.de/help/jap_help/en/help/security_test.html
http://www.proxy-list.org/en/show-my-ip.php
http://leader.ru/secure/who.html

I was rather shocked that some information that could be retrieved on my Linux host could even reveal fundamental details about my Linux Desktop like a version of my currently running Linux kernel!

In the past I’ve blogged an article which is quite related to the topic of Internet Anonimity and Browser security

You might consider checking my old article How to improve your web browser security and better secure your personal identity privacy on the internet here
I will take some steps further to look on how to further decrease the amount of OS sensitive data revealed by my browser and will further blog when I find ways for better ways to anonimize my surging.

Will the End of the World come in 2012? The Orthodox Christian perspective

Friday, April 1st, 2011

Nowdays, there is a lot of talk and discussions about the end of the world.
The fear of the End of the World in year 2012 is highly proclaimed, ancient mayan false “prophecies” are highly buzzed about.

Many people are more interested into the of the world, as many of the signs of the end times has been fulfilled.
Many people are turning back into occult and pagan beliefs to look up for prophecies to backup their thesis of the mayan prophecies.

A mess of false prophecies from different religions are usually mixed in order to proof to ourselves that the end of the world is at hand.
A number of apocalyptic movies has been produced until in the making industries as the more the time is close to year to 2012 the more sci-fi and all kind of movies on the apocalyptic theme are being produced.

Many people live in a constant fear that they’re gonna die in 2012 and start living even more irresponsible than before, asserting that there is no reason to do anything valuable now as the world’s end is near.
I myself some few years ago have been among this blind “false prophets” and has confessed the same destructive philosophy.
Yes it’s true that the Apocalypsis is approaching and has been approaching since the last 2011 years that passed since our Lord Jesus Christ’s birth on earth.
What is erronemous is the mistake that, we should live in fear about the end and we should do belief like the pagans in their shaky wrong beliefs based more on superstitiousness than on prophetic facts or signs of the time.

Even a plenty of music bands Protestant Christian bands like Saviour Machine are writting lyrics on the topic of the End Times, spreading fear unto some degree even among Christian Metal heads.

The situation outside the realm of the Christian secularity is even worser, I’ve heard a whole bunch of people especially in (USA) are preparing food and provisions to survive great cataclysm that they say is expected to come over the earth.
You can judge how insane is that! The end of the world as my spiritual father has told me some long time ago could be individually for us in every further minute.
If I as an individual die then I will experience the end of the world and when I will die is in God’s hands, so there is no point to worry about where the all world will end, if there is a high probability that my personal end could occur every single minute.
It’s sad that the consequences of such an panical beliefs about “the evils that are about to come on the world” are being falsely interpreted among Christians, this kind of tendency is also spread this days even among some practicing Orthodox Christians.

At many times studying of the Holy Bible “Book of the Apolapysis” are soul and mind destructive.
It’s a well known fact that in the past the book of Apocalypsis has been officially included in the Holy Bible, somewhere nearby the 5th century.

The reasons the holy church fathers decided to place the book of revelation in the bible so late is that, many of the things written are hard to understand and can lead novice Christian astray from the true essence of our faith which is love for God and love for the neighbor
Very pitily even I as an Orthodox Christians have suffered the great consequences of attempting to interpret the prophecies among the end of the world.

Therefore I found interesting that I share in this article what is the position of the Orthodox Church on the Apocalypsis or the so called End Times

First it should be said that Orthodox Christians positions is mostly based on factological information and prophetic saying by the Holy Fatherswhich by itself require a spiritual father to interpret them properly.

In the Orthodox Church we’re expecting the End Times, since the beginning of the one Holy and Apostolic Church. However the Apocalypsis is never being perceived as something that we should concentrate about but as an information that it’s good to have a general awareness of in order to have understanding in the spiritual times we’re living and how close we’re to the Second coming of our Lord and Saviour Jesus Christ.

The Orthodox Christian belief on Apocalypsis is completely opposite to the worldly belief which plants panic and fear in people’s mind and souls.
We belief that drawing near to the End Times, we’re drawing near to our second coming of our Lord and hence near to our eternal Salvation therefore the end days to come are not to be a concern of fear but on a contrary, they should accepted with humility and joy that we’re drawing near to our eternal salvation.

As a part of the topic of the End of the World, it’s very common nowdays in Christian and Non-Christian (heretical) groups (Mormons, Jehova’s Witnesses) to talk about the expected AntiChrist and to propagate fear in their deceived deciples.

These heretical groups has the wrong idea that starts with the definition of AntiChrist in that groups they belief AntiChrist means Against Christ, which is not very proper definition of the word.
The Orthodox Christian understanding about the AntiChrist word is Instead of Christ
Therefore the true meaning of AntiChrist in the original church was always perceived as Instead of Christ and not literally Against Christ.

Instead of Christ means, a substitute for Christ. Now if we think deeply in the modern world we have a bunch of substitute of Christ in the form of passions we have, disbelief inattendance of the Holy Liturgy – the Ancient Church service in our Orthodox Church.
In the number of Instead of Christ are a false belief to all kind of transcendental philosophies buddhism, reincarnation, hinduism, muslim beliefs, cult to public perons like let’s say Madonna or Marilyn Manson etc. etc.

If we as Christians have an example person for our life instead of having our saviour Jesus Christ for an example to follow, then we are definitely following an AntiChrist.
Don’t get me wrong I don’t say that Madonna or Michael Jackson or whoever is an AntiChrist. They’re definitely not, even though very often their behaviour and public performance becomes the reason for many people to be falsely leaded to false beliefs and false teachings different from the teachings of Our Holy Orthodox Church.

In that sense the danger of the mani AntiChrists is rooted in following anything different from the real Lord Jesus Christ who leads our Orthodox Church and who gives us grace by the 7 Church established mysteries.

Now as I said a few words about the general perception of Apocalypsis, the End of the World and the AntiChrist. Let me answer the question is there a date when the world will end up?

The Church is definitive about that and the answer is NO! NO! and NO!

It’s even written in the Holy Bible, here is the exact quote that clearly states, that we’re not given to know the exact time and date but only some general signs:

Mark 13:32:
"No one knows about that day or hour, not even the angels in heaven, nor the Son, but only the Father."

Having said that for us Christians it’s more than clear that it’s almost impossible that the end of the world is in 2012, especially if that kind of false belief is taken from a pagan religion like the mayans.

Throughout the years before this year 2011, there were plenty of so called “prophecies”, each of which has claimed the end of the world will be soon, some of the “new days end time prophets” even has gave a specific date and time for the global cataclism expected to occur..
For instance followers of William Miller (the founder of the deadly end-times movement) has predicted the exact day on which the world will end according to their calculations this was Oct 22, 1844.

You can see by your own that this kind of deliberate fear creation and massive panic is not something new and has been known to exist for several decades.

Concerning the fear of the end of the world, I remember that one of our Holy Fathers said I quote by memory: “Even if the World falls apart and the sky falls over, I would not be afraid for I believe in God”.

Our Orthodox Christian perspective is not to focus on external cataclysms and calamities but to focus on our internal spiritual life.

Knowing when the world will come doesnt’ worth a cent for us the Christians, as it is not a goal of our living. Our Goal is to gain an eternal salvation by faith in Christ and repentance for our bad sinful lives.

Today many of the panical false beliefs and “warnings” from Jehovah’s witnesses and other sects a like are absolutely deliberate, they use this as a tool to set fear and then gain followers of their soul destructive satanic teachings.
We the Orthodox Christians, should not be afraid of the end but be joyful as it’s said in Thessalonians: “..Always be joyful..”

I personally belief that the end times fear that is being planted nowdays from all medias and the internet is at many times done on purpose, to even try to deceive us the Orthdox Christians.

This kind of end times and mystical interest into prophecies and future things to come very often could mislead us and make us belief many of the false beliefs the fortune-tellers has and preach.

Unlimited interest into spirituality, definitely ends up in spiritual blindness and spiritual disored, even often to a mind inconsistencies.
The recent raise of Neuro Lenguistic Programming is nothing different, it’s just another way to blind up and deceive people and mislead them from the way of thuth that our Saviour Jesus Christ has shown us..

Interest into broken-mysticism is very natural for our fallen sinful state, but we should not let this to lead our lives, we should not live in fear Christ has never given us a spirit of fear right on the contrary.

Note that the above reasonings include a lot of my personal reasonings and it might be that I’m wrong somewhere as I’m not a father and I’m not 100% aware of all Church beliefs.
However I’m pretty sure that most that I said so far is truthful and does correspondent to our Orthodox Church understanding about Apocalypsis and End times.
There is much to be said on the topic of End of the World and our Orthodox position about it, but as my goal was simply to answer the Will the world over in 2012 and I believe I answered thoroughfully enough it will most probably not!Now to close up this article, I do pray that God (The Holy Trinity) save us and protect us from all evil and show us the true way in the Orthodox Church and deliver us from false doctrines, false beliefs and end times paranoias.