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MediaInfo – detailed information of an audio or video file

Leave a Comment / Multimedia / /

MediaInfo_90x90

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)

Further reading

– man mediainfo
– MediaInfo project

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VIM a powerful and flexible text editor

Leave a Comment / Editors / /

VIM

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.

Further reading

Schulz, Kim. Hacking Vim
http://en.wikipedia.org/wiki/Vim

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What is new in PHP 5.5?

Leave a Comment / Programming / /

PHP
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.

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Integrate GTK applications in KDE style

Desktop / /

KDE
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 Appearance of GTK+ applications in KDE[/caption]

Recommended reading

KDE project

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Compile PHP-5.6 with Apache Worker support

Leave a Comment / Systems Deployment / /

A look at PHP-5.6

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

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