GNU/Linux DVD Player Review
Playing DVDs under GNU/Linux has not had the happiest of histories, what with the DeCSS debacle and subsequent legal battle. So you'd be forgiven for thinking that you will never be able to play your DVDs on your GNU/Linux system. Luckily, this is not the case, and there are several applications available for you to download and use. The issue with DeCSS is still with us but is slowly getting clearer. However, this has left some of the DVD players officially not supporting encrypted DVDs, although unofficially, playback is possible via third-party additions.
This introduction to DVD playback applications for GNU/Linux looks at Xine, VideoLAN Client, MPlayer and Ogle. In addition to playing encrypted DVDs, unofficially in some cases, several of these players also will play back other file formats.
Xine has quite a large following, and for good reason, as it is a very capable DVD player. In addition, like most of the players reviewed here, Xine is capable of playing a large range of file types in addition to unencrypted-DVD playback. Xine easily can be extended with additional functionality as it supports plugins that enable you to incorporate new codecs (open- or closed-source) or any additional function easily. There are many plugins available for Xine on the Net ready to be downloaded.
Xine only supports the playback of unencrypted DVD directly, but support for encrypted DVDs is provided by a third-party plugin (xine_d4d_plugin). It is unlikely that Xine will support encrypted DVDs directly. The legal status of this plugin is, as always, debatable, but it is easy enough to find and install. There are some useful links on the Xine web site, and a search at Google should find the required links for this plugin. It is stated on the Xine web site that encrypted DVD playback is not going to be supported directly because of the legal issues that surround this area. However, once you have installed the plugin, Xine's playback of encrypted DVDs is smooth with no noticeable problems with audio synchronization or any video glitches.
Xine's interface is tidy and provides most of the function you might require. Depending upon your preferences, you may find that it takes up too much space on your desktop. As Xine is currently not skinnable, there is no way to change the size or layout of the GUI. If you are running XFree86 4.x, with a supported video card, you can switch Xine from windowed to full-screen mode and back again smoothly. If this is not supported by your video card or version of X, Xine still can be viewed in a window, which is the default startup mode.
Unfortunately, Xine does not support DVD menus directly; however, there is a plugin called dvdnav (available from prdownloads.sourceforge.net/dvd) that adds this functionality to Xine. This plugin is a must-have if you intend to use Xine for DVD playback. The plugin works very well, even with the complex animated menus that some DVDs have, and although this is not required for DVD playback, it obviously gives you complete access to all the features available. The code for the DVD navigation was written referencing the original Ogle DVD menu code base.
Xine is a good DVD player, and with the use of plugins it can be extended in many ways. It appears to have a solid following, which should ensure its survival. The interface, however, may not be to everyone's taste.
The VideoLAN Client is part of the VideoLAN Project, a full MPEG-2 client/server solution. However, the VideoLAN Client also can be used as a standalone program to play MPEG-2 streams from a hard disk or DVD. It currently has GTK+, GNOME, KDE and Qt front ends and can use either X11, XVideo, SDL or DirectX for video output. For audio, VideoLAN Client supports OSS, ALSA and ESD. To access encrypted DVDs, VideoLAN Client uses the library libdvdcss, which is a simple library designed for accessing DVDs like a block device without having to bother with the decryption. VideoLAN Client does not use DeCSS but a different implementation that does not use the cracked Xing decoder key. The libdvdcss was written by the VideoLAN Client development team, using the original DeCSS code as a reference base.
DVD playback with VideoLAN Client is very smooth with no noticeable problems with audio synchronization. When you start viewing a DVD, it defaults to opening up a window to display the movie, but you switch to full-screen mode quickly and easily by pressing the F key, as with the other players reviewed here. The switch from windowed view to full-screen view, and back again, is very quick and smooth with no slowing of playback.
VideoLAN Client GUI is a rather large window by default, the largest of the group. This seems unnecessary, and although you can shrink it down, it does not scale very well—a minor point, but it does seem overly big for what is a simple interface. That said, the GUI itself is fairly easy to navigate, with buttons to Stop, Pause, Forward and so on. Preferences also can be modified for items such as the path to the DVD/VCD device, audio device and output to use, the default interface and so on. It is the only player reviewed here that allows you to modify the preferences from the GUI.
The only drawback to VideoLAN Client is that there is currently no support for DVD menus, so you only can see the movie and you cannot access any additional items. This is not a major drawback and should not be held against VideoLAN Client as its DVD playback is as good as Xine and MPlayer. If you are not too worried about having DVD menu support and can live with the largest GUI of the players reviewed here, VideoLAN Client is a good choice.
Practical Task Scheduling Deployment
July 20, 2016 12:00 pm CDT
One of the best things about the UNIX environment (aside from being stable and efficient) is the vast array of software tools available to help you do your job. Traditionally, a UNIX tool does only one thing, but does that one thing very well. For example, grep is very easy to use and can search vast amounts of data quickly. The find tool can find a particular file or files based on all kinds of criteria. It's pretty easy to string these tools together to build even more powerful tools, such as a tool that finds all of the .log files in the /home directory and searches each one for a particular entry. This erector-set mentality allows UNIX system administrators to seem to always have the right tool for the job.
Cron traditionally has been considered another such a tool for job scheduling, but is it enough? This webinar considers that very question. The first part builds on a previous Geek Guide, Beyond Cron, and briefly describes how to know when it might be time to consider upgrading your job scheduling infrastructure. The second part presents an actual planning and implementation framework.
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With all the industry talk about the benefits of Linux on Power and all the performance advantages offered by its open architecture, you may be considering a move in that direction. If you are thinking about analytics, big data and cloud computing, you would be right to evaluate Power. The idea of using commodity x86 hardware and replacing it every three years is an outdated cost model. It doesn’t consider the total cost of ownership, and it doesn’t consider the advantage of real processing power, high-availability and multithreading like a demon.
This ebook takes a look at some of the practical applications of the Linux on Power platform and ways you might bring all the performance power of this open architecture to bear for your organization. There are no smoke and mirrors here—just hard, cold, empirical evidence provided by independent sources. I also consider some innovative ways Linux on Power will be used in the future.Get the Guide