Language Selection

English French German Italian Portuguese Spanish

Casual Programming and Linux Screen-Recorders

Filed under
Linux

After being retired (for four years) from teaching high school Computer Science, I decided to get back into programming again. I once taught a beginning programming class using the Ruby language, and I thought that would be a good way to get back into programming. So, I decided I needed a “Ruby refresher”, and I wanted to learn more about that language than I taught in the classroom.

After much surfing and sampling Ruby instructional videos online, I finally purchased Pragmatic Studio's Ruby Programming Video Course. Note that this course is not free--in fact, it's $199 US. But it includes a vast amount of material.

There are 25 videos covering everything from Numbers and Strings to Objects to Project Distribution. Better yet, the videos are HD in quality, and DRM free. So once registered, you can download all 25, and utilize them at your convenience. The total duration is nearly 5 hours, but since the videos are only 5-20 minutes each, you can work through the course in small increments. They are well put-together, follow a step-by-step sequence, vocally clear, and well done.

In addition, you get access to an online workbook that leads you through implementing a project similar to the one shown in the video lessons. Nearly every video has a corresponding workbook lesson, so you get to practice using the new concepts. Here's the Video Lesson Topic Outline (Items 1 & 13 each contain 2 videos):
01. Introduction(2 vids)  10. Objects Interacting  19. Input/Output
02. Running Ruby          11. Separate Souce Files 20. Inheritance
03. Numbers and Strings   12. Unit Testing         21. Mixins
04. Variables and Objects 13. Conditionals&TDD(2)  22. Distribution
05. Self                  14. Modules              23. Wrap Up
06. Methods               15. Blocks
07. Classes               16. Symbol and Structs
08. Attributes            17. Hashes
09. Arrays                18. Custom Iterators
So, yes, a sharp price—but with sharp instruction.

Making my Own Videos
Now, the quality videos from Pragmatic have inspired me to start making quality instructional videos. Again, after searching high and low for a good screen recorder, I finally chose another costly program: Demorecorder.

Yes, this program too is costly, but gives me the high-quality video and very-high quality audio that I'm looking for. There are differing levels of the program you can purchase:

  • DemoRecorder-Pro (node-locked license) – $247.00 (Volume Discounts Available)
    DemoRecorder Pro is for professional users who also create full screen recordings and who need premium support. (It is not intended for unattended long term recording of system usage. In that case please purchase the 24/7 edition)

  • DemoRecorder-24/7 (node-locked license) copy – $997.00
    DemoRecorder for long term recording for logging and documentation purposes of (mission critical) systems. (This edition not yet been officially released...but available in purchase preview edition).

  • DemoRecorder-Web (node-locked license) – $137.00 (Volume Discounts Available)
    For amateur user who also wants to show the videos on the Web using streaming with Flash technology. (And who does not need premium support, i.e., can wait longer for getting support queries answered.)

  • DemoRecorder-Standard (node-locked license) – $97.001 (Volume Discounts Available)
    For amateur user who does not need export to Flash Video. (And who does not need premium support, i.e., can wait longer for getting support queries answered.)

Now, considering the cost of Camtasia ($300 US), which is the best screen recorder available under Microsoft Windows, the prices seem reasonable. And DemoRecorder-Pro (or better) provides the capability of creating videos in the following formats: AVI, MPEG2, MPEG4, VOB, FLV, and FLV+SWF+HTML for video-streaming over the web.

Yes, I've tried several free screen-recorders in linux such as: recorditnow, kazam, Istanbul, and recordmydesktop. I'm using very good quality video cards, graphic cards, and good system throughput. The only one which gives me the quality I seek is DemoRecorder.

So, yes, I use a costly screen-recorder. But I do use FLOSS as well. I edit the video clips with kdenlive, use Libreoffice Impress for some presentations, gimp and mtpaint for drawing, and the codeblocks Integrated Development Environment and Geany text-editor for programming demonstrations.

I hope to have some material to present in 3 or 4 months.

Comment viewing options

Select your preferred way to display the comments and click "Save settings" to activate your changes.

Best recorder ffmpeg/avconv

I found that an avconv (ffmpeg) command with a carefully selected set of parameters can produce perfect quality screen recordings on high resoltion outputs even on my old core 2 duo directly encoding with h264. I don't have the command at hand right now, but leave a message if you are curious and I'll be back with this free solution.

I would be very interested in

I would be very interested in this.

Video was OK--audio was the problem

In terms of Screen Recorders, most videos were adequate--the big issue was the audio quality.

More in Tux Machines

Kernel: Graphics and Linux M1 Support

  • AMD + Valve Focusing On P-State / CPPC Driver With Schedutil For Better Linux Efficiency - Phoronix

    As reported at the start of August, AMD and Valve have been working on Linux CPU performance/frequency scaling improvements with the Steam Deck being one of the leading motivators. As speculated at that time, their work would likely revolve around use of ACPI CPPC found with Zen 2 CPUs and newer. Published last week was that AMD P-State driver for Linux systems indeed now leveraging CPPC information. AMD formally presented this new driver yesterday at XDC2021.

  • DRM Driver Posted For AI Processing Unit - Initially Focused On Mediatek SoCs - Phoronix

    BayLibre developer Alexandre Bailon has posted a "request for comments" of a new open-source Direct Rendering Manager (DRM) driver for AI Processing Unit (APU) functionality. Initially the driver is catering to Mediatek SoCs with an AI co-processor but this DRM "APU" driver could be adapted to other hardware too. Alexandre Bailon sums up this DRM AI Processing Unit driver as "a DRM driver that implements communication between the CPU and an APU. This uses VirtIO buffer to exchange messages. For the data, we allocate a GEM object and map it using IOMMU to make it available to the APU. The driver is relatively generic, and should work with any SoC implementing hardware accelerator for AI if they use support remoteproc and VirtIO."

  • Apple M1 USB Type-C Linux Support Code Sent Out For Testing - Phoronix

    he latest patches sent out for review/testing on the long mission for enabling Apple M1 support on Linux is the USB Type-C connectivity. Sven Peter has sent out the initial USB Type-C enablement work for the Apple ACE1/2 chips used by Apple M1 systems. In turn this Apple design is based on the TI TPS6598x IP but various differences. The Linux kernel support is being added onto the existing TIPD driver.

Proprietary Security Issues

Audiocasts/Videos: GNU World Order, Sioyek, LUTs

today's howtos

  • How to Install VirtualBox on Debian 11 (Bullseye)

    As we all know that VirtualBox is a free virtualization tool which allows us to install and run multiple virtual machines of different distributions at the same time. VirtualBox is generally used at desktop level where geeks used to create test environment inside the virtual machines. Recently Debian 11 (bullseye) is released with latest updates and improved features. In this post, we will cover how to install VirtualBox and its extension pack on Debian 11 system.

  • How To Install Opera Browser on Debian 11 - idroot

    In this tutorial, we will show you how to install Opera Browser on Debian 11. For those of you who didn’t know, Opera is one of the most popular cross-platform web browsers in the world. Opera offers many useful features such as free VPN, AdBlocker, integrated messengers, and private mode help you browse securely and smoothly. Share files instantly between your desktop and mobile browsers and experience web 3.0 with a free crypto wallet. This article assumes you have at least basic knowledge of Linux, know how to use the shell, and most importantly, you host your site on your own VPS. The installation is quite simple and assumes you are running in the root account, if not you may need to add ‘sudo‘ to the commands to get root privileges. I will show you through the step-by-step installation of Opera Web Browser on a Debian 11 (Bullseye).

  • Get your Own URL Shortening Service With YOURLS and Raspberry PI

    Online URL shortening are services able to transform a long, hard to manage url into a shorter one, usually composed by a domain ana a short casual string (the most famous being Bitly, Adfly and Shortest). With YOURLS and Raspberry PI you can create your own, private shortening service In this tutorial, I’m going to show you how to install and configure YOURLS with a Raspberry PI computer board and publish it. Please note that this can’t be performed with a Raspberry PI Pico as it is a microncotroller and not a Linux computer. YOURLS stands for Your Own URL Shortener. It is an open source software, running on a LAMP server and using a small set of PHP scripts that allow you to run your own URL shortening service.

  • How to play Orcs Must Die! 2 on linux

    Create your own, self hosted url shortener service with YOURLS and Raspberry PI. Step-by-step guide to have it working in a very few time

  • Configure External RAID on Ubuntu/Centos/RedHat - Unixcop

    RAID: Stands For Redundant Array Of Independent Disks (Hardware Raid) or Redundant Array Of Inexpensive Disks (Software Raid) and that is technology that keeps data redundant to avoid data loss if any disk falls or is corrupted .

  • Don’t like Visual Studio Code? Try these 5 Alternatives Apps - itsfoss.net [Ed: Some of the 'alternatives' are also Microsoft and also proprietary software. Rather awful list...]

    When it comes to programming, we are going to need a plain text editor that allows us to easily modify files or take notes. One of the most complete and professional tools is Visual Studio Code. Although this Microsoft program is not indicated for users with little experience, so, if it is our case, surely we want to know what the best alternatives are. Anyone can download Virtual Studio Code, since it is completely free, but without a doubt, it has been designed to be used by programmers. In this field we find many other good options for professional work, especially if we are interested in knowing anything about a program developed by Microsoft.

  • How to Access BBSes in Linux Using Telnet

    In the '80s and early '90s, the most popular way to get online in the US was through Bulletin Board Systems or BBSes. While they're nowhere near as numerous as they were during their mid-90s heyday, there are still hobbyists operating these systems scattered around the world. And you can access them from Linux, without a dial-up modem.

  • How to solve the undefined variable/index/offset PHP error - Anto ./ Online

    This guide will you how to solve the notice undefined variable, index, or offset error that you are experiencing in PHP. This error is easy to spot in the warning and error message logs. Consequently, you will typically see a descriptive error message like this...