Video Formats

MOV - This is the format used the Quick Time Player.
AVI - Creado por Microsoft y permite tener simultaneamente video y audio, con capacidad para varias pistas de audio a la vez.
MPEG - It is fully compatible and still is in development. It is able to mix different types of data like video, audio and speech.
DVD - Desarrollado durante los años 90. Hace referencia a un monton de differentes maneras de almacenamiento de datos.
Divx - Funciona en los sistemas Mac OS, Windows y Linus, combinado con sistemas de audio MP3, con una mas alta calidad que los VHS. Su auge fue con la llegado de los DVD.

Moodle, Linux and Open Office

Moodle

Moodle (or Modular Object-Oriented Dynamic Learning Environment) is a free and open-source learning software platform. It was initially developed by Martin Dougiamas to help educators create online courses. Most of the development is done by the Moodle Trust in Western Australia.

Linux

Linux refers to all the Unix-like family of computer operating systems. It is functional in a wide range of computer hardware. Linxus is a leading server operating system and runs the 10 fastest supercomputers in the world. Linux is one of the most prominent examples of free and open source software.

Open Office

OpenOffice.org is more commonly known as OOo or Open Office. It is an open-source application suite with its main components in word processing, spreadsheets, presentations, graphics and databases. It is a free software and is available and various operating systems. In November 2009 it already supported 110 languages. It started as StarOffice by StarDivision and acquired by Sun Microsystems in August 1999. The source code was released in July of 2000. It is primarily sponsored by Oracle Coproration (who bought Sun Microsystems). Though it is called Open Office its formal name is OpenOffice.org.

Open Source Initiative (OSI)

The Open Source Initiative (OSI) is an organization dedicated to promoting open source software.

The organization was founded in February 1998 by Bruce Perens and Erick S. Raymond, promoted by NetScape Communication Corporation publishing the source code for its flatship NetScape Comunicator product. Later, in August 1998 the organization added a board of directors.

Although born from the same history of unix, Internet free software, and the hacker culture as the free software movement launched by Richard Stallman and his free software foundation, the Open Source Initiative was formed and chose the term "open source", in Michael Tiemann's words,

To dump the moralizing and confrontational attitude that had been
associated with free software in the past and sell the idea strictly on the same
pragmatic, bussiness case rounds that had motivated
NetScape.

Stallman counter-charges that oversized pragmatic focus on a model for software development and marketing ignores what he considers to be the central "ethically imperative" and the focus on "freedom" that underlines free software as he defines it and blurs the distinction with semi-free or wholly proprietary software.


1.- What is the Open Source Initiative?
The Open Source Initiative is an ORGANIZATION.

2.- From where does it come from?
This organization comes from Netscape Communications.

3.- Why is it called "open source"?
Netscape published its source code making it available to everybody.


The Open Source Initiative releases free software for everyone to use. Open source is used instead of the "free software" term because they want to avoid the arguments of products being given away freely when people have worked for them.


Free: public domain (freeware)
Semi-free: shareware
Wholly proprietary: licensed
Public domain vs. Proprietary

DropBox

DropBox is a free program that allows to create a DropBox file in multiple computers and all computers with that file will be updated each time it connects to the internet with the info that has been put into the files. Also a backup copy will always be stored in http://www.dropbox.com/ so you can check there, download or recover the archives.

It is completely free to a maximum capacity of 2GB, though it can be increased by paying a fee.

I'll probably look into the problem and us it as a backup file.

Vacations in Poland

This vacations we travelled to Poland, from July 30th to August 29th. It was very good and different to what I had seen other years in other places. We went to Cracow by plane, with a stop in Brussels, on July 30th. Cracow is probably the second most important city in Poland, and was the ex-capital of Poland.

The city was very pretty, especially the old section of the city. There was quite a lot of turism and many Spanish also. Shops worked practically the 24hr, including restaurants and most didn't even close on Sundays. Streets were very wide and statues of the polish Pope could be found everywhere, as well as churches. They had the city walls and a medieval Barbican perfectly conserved in the city. They ate in large cuantities, especially meat and cheese, including in breakfast.

We also visited the concentracion camp of Auswitz and the Salt Mines. Both were very good, though the Polish lack a lot in organization skills. The Salt Mines were the most important in Europe and the oldest, still working since the Middle Ages.

Roads were terrible. My parents said they were like here 40 years ago. It took us 4 hours to travel 110 km south. So when we went to see Warsaw for 3 days we got the train. It took us 3 hours by train, but it took 4 by car!! Warsaw had been almost utterly destroyed during the Second World War, but it was very well rebuilt. It was pretty and the old part was very good. Not like Brest in northern France, which was horrible and had also been destroyed during the war.

When we went back to Cracow we visited small towns in the country-side, but they are nothing special. Very dispersed and weakly centralised, with no shops or anything prepared for tourists. The country-side was very green and very flat, small hills and enourmous territories of green flat lands. There were quite a lot of mosquitoes, and wildlife. We saw a pair of foxes and a hare.

We had a very good weather. It was hot when the sun shone. But it was very changing. In one single day you could have clouds, sun, rain and sun once again, all in a single day.

There was a lot of pratiotism in Poland. Apart from all the memorials to the dead and deported during the war, you could see Polish dressed as second world war soldiers marching around the city singing pratiotic songs.

The Polish language is very hard to learn, and only learned a few words in all the vacations. They speak very fast and pronounce the "w" as a "v". It surprised by that they said for hat, chapel (txapela) which is very similar to euskera. I think the language is sort of a mix in between Russian and German. Words I learned where thank you (yenkuye, not sure hot it was written) and good bye (dubitzenia)

In conclusion I had a lot of fun during my vacations, they were very good. Next time I'd like to go and see the Baltic, where amber is very common, though amber could be found in shops all around Poland.

1.- Track
Audio tracks contain digitally sampled sounds. Channels of sound are represented by one mono audio track, a two channel sound by one stereo audio track.
2.- Editing
Editing is about cutting, placing, fading, cross−fading, shifting, duplicating and adjusting the volume (also referred to as level) of audio material. Mixing is a form of editing too of course.
3.- Boom Pole Operator
The boom pole is an extendible stick with a microphone attached to it. This is used to record dialogue during filming or not.
4.- Sound Mixer
He records the sound catched by the Boom Pole Operator via cable or wirless divise to tape, optical disks or hard drive.
5.- Production Sound
The raw sound material of a show is called production sound and the only desirable parts it usually haves is dialogue and body sounds.
6.- Post Production
Now they shorten and adjust the sound so the transitions and coordination in between sound and movement is smooth.
7.- Added Sounds; Ambience; Effect
After they add sounds in. They introduce ambience like the conversation of people in a tavern which during the filming is not there. Then effects are recorded separately like explonsion, bell rings, slaps, weapon shots...
8.- Split: What happens when you split a sound file for?
You get two different tracks.
9.- What do you split a sound file for?
You split is so you can move it around an change its position or to hear two things at the same time.
10.- Fade in/Fade out
It applies a linear fade in or out the file

Audacity

1- What is a sound?
A form of energy.
2- What is the speed of sound?
340.29 m / s
3- What is faster, the speed of light or the speed of sound?
Speed of light.
4- How do you record a sound?
With a microphone.
5- What is the difference between digital and analog sound?
The key difference between analog and digital technologies is that analog technologies record waveforms as they are, while digital technologies convert analog waveforms into sets of numbers, recording the numbers instead. When played back, the numbers are converted into a voltage stream that approximates the original analog wave.
6- Write 3 advantages of digital sound over analog sound?
Unlike digital audio systems, analog systems do not require filters for bandlimiting.

One aspect that may prevent the performance of practical digital systems from meeting their theoretical performance is jitter. This is the name given to the phenomenon of the variations in spacing of the discrete samples in time within the stream of samples that make up a (decoded) digital signal. This can be due to timing inaccuracies of the digital clock. Ideally a digital clock should produce a timing pulse at exactly regular intervals.

Analog systems do not have discrete digital levels in which the signal is encoded. Consequently, the original signal can be preserved to an accuracy limited only by the intrinsic noise-floor and maximum signal level of the media and the playback equipment, i.e., the dynamic range of the system. With digital systems, noise added due to quantization into discrete levels is more audibly disturbing than the noise-floor in analog systems.
7- What are the factors that determine the quality of digital sound?
The sample rate and the sample format
8- What audio file formats does Audacity support?
AUP;IRCAM;WAV;MPEG;AIFF;Ogg Vorbis
9- Write the difference between PCM audio files and Compressed ones?
The PCM is every number on a digital audio file represents a waveform. In the compressed by algorithms that are able to squeeze the waveforms in less space.
10- Write examples of each one of them.
MP3: compressed Wav: PCM