LibreByte | Page 14 | Noticias y tutoriales sobre software libre

MediaInfo – detailed information of an audio or video file

Leave a Comment / Multimedia / sedlav / April 13, 2016

MediaInfo is an utility that allows you to:

Read various audio and video formats
Show information in several formats: text, html, spreadsheet, hierarchical,…
Customize the previous views
Exporting information as text, csv, html…

The following is the information dumped by MediaInfo:

General: title, author, director, album, size, …
Video: codec, aspect, frame per second (fps), bitrate, width, height, …
Audio: codec, channels, language, bitrate, …
Text: subtitle language

MediaInfo supports following formats:

Video: mkv, ogm, avi, divx, quicktime, mpeg-1, mpeg-2, mpeg-4, …
Audio: ogg, mp3, wav, acc, m4a, …
Subtitles: srt, ssa, ass, sami, …

MediaInfo can be used through its graphical interface, command line interface or integrated into an application using the API.

To install MediaInfo (cli) in Debian GNU/Linux type:

$ sudo apt-get install mediainfo

In order to obtain information from a file type:

$ mediainfo buffers_listed_and_hidden.ogv

General
ID                                       : 280403682 (0x10B69EE2)
Complete name                            : buffers_listed_and_hidden.ogv
Format                                   : OGG
File size                                : 4.61 MiB
Duration                                 : 3mn 28s
Overall bit rate mode                    : Variable
Overall bit rate                         : 186 Kbps
Writing application                      : ffmpeg2theora-0.25
SOURCE_OSHASH                            : 3fd514e6b64347ca

Video
ID                                       : 889190165 (0x34FFF715)
Format                                   : Theora
Duration                                 : 3mn 28s
Bit rate                                 : 89.5 Kbps
Nominal bit rate                         : 297 Kbps
Width                                    : 640 pixels
Height                                   : 480 pixels
Display aspect ratio                     : 4:3
Frame rate                               : 30.000 fps
Compression mode                         : Lossy
Bits/(Pixel*Frame)                       : 0.010
Stream size                              : 2.22 MiB (48%)
Writing library                          : Xiph.Org libtheora 1.1 20090822 (Thusnelda)

Audio
ID                                       : 1236641633 (0x49B5A761)
Format                                   : Vorbis
Format settings, Floor                   : 1
Duration                                 : 3mn 28s
Bit rate mode                            : Variable
Bit rate                                 : 80.0 Kbps
Channel(s)                               : 2 channels
Sampling rate                            : 44.1 KHz
Compression mode                         : Lossy
Stream size                              : 1.99 MiB (43%)
Writing library                          : libVorbis 20090709 (UTC 2009-07-09)

VIM a powerful and flexible text editor

Leave a Comment / Editors / sedlav / April 11, 2016

The first version was released in November 1991, for the Amiga platform. A year later came the first version for UNIX. Its author, Bram Moolenar, was inspired by VI editor, very popular among the UNIX followers. Vim inherits the features of VI and adds new ones, being a 99% compatible with its predecessor when it starts in compatible mode.

Its development model under a GPL compatible license and the new built-in features made VIM gain a lot of followers very quickly becoming one of the most popular editors. Currently the most GNU/Linux distributions incorporate it as the text editor by default.

Basic modes

Normal. Using key combinations you can perform actions such as: copy and delete words, groups of words, lines, go to start, at the end of the file, etc. It is the default mode when you start the editor
Insert. Allows you to edit the file on which we are working
Command-line, Cmdline. Allows to execute complex commands such as: searches by key words, searches using regular expressions, read an external file, open an external file, etc.
Visual. Allows you to select a block of text in a simple and flexible way and execute operations such as: delete, copy, change to upper case or to lower case as applicable, space to the right, to the left, etc.
Select. Similar to selection mode implemented by OpenOffice/LibreOffice by typing a printable character delete the selection and starts the insert mode
Ex. Similar to the Cmdline mode, but after running a command mode remains

Change from one mode to another
From / to	Normal	Insert	Cmdline	Visual	Select	Ex
Normal		i, Shift i	:, /, ?, !	v, Shift v, Ctrl v	gh, g Shift h, g Ctrl h	Shift q
Insert	Esc		—	—	—	—
Cmdline	Enter, Esc, Ctrl c	:start		—	—	—
Visual	Esc, v	c, Shift c	:		Ctrl g	—
Select	*	**	—	Ctrl o, Ctrl g		—
Ex	:vi	—	—	—	—

* You can change from Select selection to Normal mode pressing one of the buttons ← → ↑ ↓
** You can enter in insert mode holding any printable character

Relevant characteristics

Highlighting of syntax for more than 200 programming languages (Java, Perl, PHP, Python, Bash, etc.)
Integration with a large number of compilers, interpreters and debuggers (GCC, MANX AZTEC C, TEX COMPILER, other)
Autocomplete
Search by key words
Allows to execute operations (searches, substitutions of words) based on regular expressions
Undo and redo
Command completion (similar to bash)
Horizontal, vertical, or multiple windows which allow you to edit various file at the same time
Flexible architecture that allows the integration of additional functionality through scripts developed by contributors
Online documentation and integrated to the editor

Vim also has a user interface (gVim), which may be more friendly for beginners, however veterans administrators prefer use it in text mode

The latest stable version is the 7.4.x Also the binary is available for the following platforms: UNIX, MS-DOS / MS-Windows, Macintosh, Amiga, OS/2, Cygwin, other.

Change keyboard layout in KDE

Leave a Comment / Desktop / sedlav / April 10, 2016

How to change the configuration of my keyboard in KDE to be able to write accented words?

Use the following procedure to change the setting of your keyboard in KDE.

Change keyboard layout in KDE Read More »

What is new in PHP 5.5?

Leave a Comment / Programming / sedlav / April 9, 2016

In recent years the PHP community has made a great effort to improving and adding new features and functionality to this popular programming language in order to make it more attractive, functional and useful. With the release of PHP 5.5 have been introduced some features very expected by the developer community. Today LibreByte proposes to show everything new which brings PHP 5.5.

What is new in PHP 5.5? Read More »

Integrate GTK applications in KDE style

Desktop / sedlav / April 7, 2016

P. I installed the KDE desktop, but my preferred applications: Iceweasel and GIMP look horrible how to fix this?

R. In order your GTK+ 2.x and GTK+ 3.x applications have the same appearance as the native KDE applications you should install the following packages.

– gtk2-engines-oxygen
– gtk3-engines-oxygen
– kde-config-gtk-style

To do this, type the following command in Debian GNU/Linux

sudo apt-get install gtk2-engines-oxygen gtk3-engines-oxygen kde-config-gtk-style

then go:

1. Start Menu
2. Select System Settings (KDE 4) / Settings > System Settings (KDE 5)
3. Select Application Appearance
4. Set the options shown in the figure below

[caption id="attachment_1515" align="alignleft" width="640"]

Appearance of GTK+ applications in KDE[/caption]

MOC – a music player for console

Leave a Comment / Multimedia / sedlav / April 6, 2016

MOC (Music On Console) is a music player with a clear and simple interface based on ncurses due to its client/server architecture also allows you to run the player as a daemon and controlling all actions through the command line. You can play mp3, ogg and wav files.

MOC – a music player for console Read More »

Compile php-5.6 with fpm support

5 Comments / Systems Deployment / sedlav / April 5, 2016

On August 28 the PHP development team released version 5.6 which includes innovative features such as: functions with arguments variable using the operator …, exponentiation operations by making use of the operator **, import functions and constants using the use keyword among others. Today LibreByte will show as compiling php-5.6 with fpm support.

Compile php-5.6 with fpm support Read More »

Compile PHP-5.6 with Apache Worker support

Leave a Comment / Systems Deployment / sedlav / April 4, 2016

The Apache Worker implements a hybrid multi-process multi-threaded server allowing to serve a large number of requests per second using fewer resources than Prefork module then is a good option if your site is under heavy load. Other advantages of using Apache Worker is that it allows to create multi-threaded applications making use of pthreads extension

Compile PHP-5.6 with Apache Worker support Read More »

apt-get proxy configuration

Leave a Comment / Systems Deployment / sedlav / April 3, 2016

Q. How can I configure apt-get to update my packages if I'm behind a proxy?

R. you must edit the /etc/apt/apt.conf file and add the following line.

apt-get proxy configuration Read More »

10 questions and answers about WordPress

Leave a Comment / CMS / sedlav / April 1, 2016

WordPress is a Content Management System developed in PHP and MySql with an architecture based on plugins and themes. WordPress is developed and maintained by hundreds of developers around the world.

10 questions and answers about WordPress Read More »