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Install FFmpeg on RHEL 5 or CentOS 5

Ryan — Wed, 18 Jan 2012 22:45:50 +0000

FFmpeg contains a number of tools to record, convert, stream and play multimedia content. The following tutorial will guide you through the installation of FFmpeg on either RHEL 5 or CentOS 5. I have chosen running on CentOS but it shouldn’t make a difference either way. Lets get started!

Adding the DAG repository

The first thing that you need to do is set up the DAG repository. This repository contains a large amount of very handy packages not available in the default repositories.

Add the following lines to: /etc/yum.repos.d/CentOS-Base.repo
[dag] name=DAG RPM Repository baseurl=http://apt.sw.be/redhat/el$releasever/en/$basearch/dag gpgcheck=1 enabled=1

Now you need to add DAG’s GPG key. Without this you will get the following error message when attempting to use it with yum.

warning: rpmts_HdrFromFdno: Header V3 DSA signature: NOKEY, key ID 6b8d79e6 Public key for faac.x86_64.1.26-1.el5.rf.rpm is not installed

Import the GPG key:
rpm --import http://apt.sw.be/RPM-GPG-KEY.dag.txt

This next step is not necessary, but if you encounter any problems you may want to try updating your system.
$ sudo yum update

Install FFmpeg

$ sudo yum install ffmpeg

That should be it.

GNOME 3 Featuring Gnome Shell is Released

Ryan — Wed, 06 Apr 2011 21:27:21 +0000

April 6th is finally here and those of us who have been keeping track of GNOME 3 development, you know that means the release of GNOME 3 desktop featuring Gnome Shell. GNOME 3 and Gnome Shell are a dramatic shift from what users have come to expect from GNOME 2.

From the press release:

Today, the GNOME Desktop project released GNOME 3.0, its most significant redesign of the computer experience in nine years. A revolutionary new user interface and new features for developers make this a historic moment for the free and open source desktop.

Within GNOME 3, GNOME Shell reimagines the user interface for the next generation of the desktop. This innovative interface allows users to focus on tasks while minimizing distractions such as notifications, extra workspaces, and background windows.

Fedora 15 will feature GNOME 3 as their default desktop when they release in May. Up next in the release cycle will be Ubuntu and their Unity that will be the default desktop for their upcoming 11.04 Natty release. It will be interesting how the two compare as they share many of the same design elements and functionality.

Installation

At the moment you can download Live CD images for both Fedora and openSUSE but no distribution currently has it in their repositories.

If you are running Ubuntu and want to try it out as your default desktop, there is an article on how to build the latest version from source.

Install GNOME Shell in Ubuntu 10.10 Maverick

Ryan — Tue, 08 Mar 2011 20:46:32 +0000

GNOME Shell is a component of GNOME 3.0 which is the next generation of the GNOME Desktop Environment scheduled for release in April 2011. With the release fast approaching you may be eager to give it a try on your current Ubuntu 10.10 installation.

There are currently two ways to install GNOME Shell. The easiest method is to install the gnome-shell package in the Ubuntu repository. Unfortunately the latest version supported in Ubuntu 10.10 is 2.32 which will give you a good taste of what to expect, but is outdated compared with the latest development releases (2.91.x series will become the official 3.0 stable release). The second method is to build from source. This will give you the latest version but is slightly more complex. If you are comfortable with the command line it shouldn’t be too much of a hassle.

Method 1: Install Old (2.32) Version from the Repository

GNOME Shell is in the Ubuntu repositories by default, simply install it with apt-get. Unfortunately this will give you the outdated 2.32 version.
$ sudo apt-get install gnome-shell

Alternatively you can install the gnome-shell package from the Ubuntu Software Center.

Method 2: Build Latest (3.X) Version from Source

The following steps will give you the latest bleeding edge version of GNOME 3. This will NOT break your current GNOME 2 installation, but simply install GNOME 3 and its dependencies along side your current packages. You will be free to switch between GNOME 2 and 3 at will.

1) Install Dependencies

Run this command to install the GNOME Shell dependencies.
$ sudo apt-get install curl libtiff4-dev libgstreamer0.10-dev libcroco3-dev xulrunner-dev mesa-utils mesa-common-dev libreadline5-dev libgl1-mesa-dev libwnck-dev librsvg2-dev libgnome-desktop-dev libgnome-menu-dev libffi-dev libgtk2.0-dev libgconf2-dev libdbus-glib-1-dev gtk-doc-tools gnome-common git-core flex bison automake build-essential icon-naming-utils autopoint libvorbis-dev libpam-dev libgcrypt-dev libtasn1-dev libtasn1-3-bin libgnome-keyring-dev libupower-glib-dev libxklavier16 libxklavier-dev xserver-xephyr python-dev libpulse-dev libjasper-dev jhbuild libgtop2-dev libsqlite3-dev libproxy-dev libdb-dev libproxy-dev libcups2-dev libusb-1.0-0-dev

2) Download the Source

Get the script to setup your jhbuild environment.
$ wget http://git.gnome.org/browse/gnome-shell/plain/tools/build/gnome-shell-build-setup.sh

Make the script executable.
$ chmod +x gnome-shell-build-setup.sh

Execute the script. This will install jhbuild.
$ ./gnome-shell-build-setup.sh

3) Build GNOME 3

This command will download the latest source code and build GNOME 3. GNOME Shell includes 40+ packages that need to be downloaded and built. This can take a significant amount of time to complete so be patient.
$ jhbuild build

4) Keep GNOME 3 Up to Date

You are running the bleeding edge version of GNOME 3 and because of this the code in the git repositories will be constantly changing. To test the latest changes after your initial insallation simply run the following command. This automatically update your local copy of the source code and rebuild if there are any changes to GNOME 3 package or its dependencies.

$ jhbuild build

Starting GNOME Shell

Alt+F2 and enter:
$ ~/gnome-shell/install/bin/gnome-shell –-replace

Stopping GNOME Shell

To exit and return to your default Gnome 2 hit Alt+F2 and enter:
debugexit

Troubleshooting

If you are using an NVIDIA graphics card and are having problems with speed.
Fix Slow Animations in GNOME Shell for NVIDIA Graphics Cards

This guide will walk you through the steps necessary to download the source code and build the GNOME 3 package. It is helpful if you run into any problems.
Build GNOME Shell

Fix git-upload-pack and git-receive-pack errors on shared hosting

Ryan — Thu, 24 Feb 2011 11:34:20 +0000

When pulling from a remote git repository located on shared hosting you will get the “git-upload-pack: command not found” error. A similar error occurs with the git-receive-pack when doing a push as well. This occurs when git is installed locally (in your home directory), and not system wide because git cannot locate these binaries.

Normally this can be fixed by setting the $PATH environment variable to include the correct path to these binaries on the remote server. Unfortunately it will not work in this case as .bashrc is not sourced since the command is invoked in non-interactive mode via ssh.

There are 2 solutions to this problem.

The first solution is to explicitly include the path to the binaries when pushing or pulling from your local repository.

$ git pull --upload-pack /path/to/git/git-upload-pack$ git push --receive-pack /path/to/git/git-receive-pack

The second solution involves adding the path to your git-upload-path and git-recieve-path in your local .git/config file under [remote "origin"]. This is the easiest method as you only have to make this change once.

[remote "origin"] url = <repo address> fetch = +refs/heads/*:refs/remotes/origin/* uploadpack = <path to git-upload-pack> receivepack = <path to git-receive-pack>

Add Ubuntu medibuntu repository

Ryan — Tue, 11 Nov 2008 11:52:18 +0000

The Medibuntu repository (Multimedia, Entertainment & Distractions In Ubuntu) contains packages that cannot be included into the Ubuntu distribution for legal reasons. Some of these packages include Skype Acrobat Reader, Google Earth, and multimedia codecs.

Add Medibuntu to your sources.list. Make sure you specify the correct version of your distribution. This example uses Intrepid Ibex (Ubuntu 8.10).

# wget http://www.medibuntu.org/sources.list.d/intrepid.list --output-document=/etc/apt/sources.list.d/medibuntu.list

Then add its GPG key to your keyring.

# apt-get update && apt-get install medibuntu-keyring && apt-get update

Now you should be able to install packages in this repository.