Language Selection

English French German Italian Portuguese Spanish

ogg theora videos to avi

Filed under
Howtos

I've been writing a Ruby computer programming textbook (the going is slow). Along with the book will be a series of instructional videos on CD showing video computer screen clips with audio narration.

I've been using gtk-recordmydesktop to record my computer screen and narration. This is working fairly well, both in terms of video and audio quality.

However, since gtk-recordmydesktop records in ogg theora form, I need to convert these videos into something that most MS-Windows users can play (without downloading and installing vlc media player). Also, I can't use Linux video editing software on ogg theora videos--they won't work with this format (I've tried cinelerra, lives, and others).

I've done very little with video on computers, and I find the number of codecs/compression formats/container formats bewildering.

But I have done some research on how to do the ogg theora to avi conversion. I finally found a solution that seems to work, using mencoder.

Assuming the input file is out.ogg, and the desired output file is out.avi, the syntax looks like this:
mencoder out.ogg -o out.avi -oac mp3lame -ovc lavc

I need to do more testing, but, so far, this seems to work ok.

And, before somebody flames me, I do realize that we should encourage the use of open formats like ogg theora.

More in Tux Machines

FLOSSophobia

I have seen it many times. "Linux is a cancer". "Open sauce". "Linuxtard". I even remember the teacher who did not bring a laptop for her presentation and, when I offered her my Linux netbook, she rejected it as if I had presented her something illegal. She tried to use an old Windows computer instead but, when the computer failed, she ended up displaying her presentation with my Linux netbook. Clearly, this teacher's position was not based on ignorance or lack of expertise because she knew Linux existed and all she had to do was to display slides. Her refusal was due to indoctrination: she had learned that Linux and non-Microsoft office suites had to be rejected. Read more

Today in Techrights

Hands on With elementary OS Powered Centurion Nano Laptop by Alpha Store

If you want to buy a new laptop, no doubt you should consider the Centurion line. It will be a good choice for you, Linux aficionado. As well as for your Windows-addicted husband/wife/employees. The Centurion Nano is certainly not a “gamer” laptop. However, besides that particular use case, and for an interesting price, you will get a very competent computer, 100% compatible with Linux and usable for a broad range of tasks. Read more

Tryton and Python Deprecation Warnings

  • Trying Tryton
    The quest to find a free-software replacement for the QuickBooks accounting tool continues. In this episode, your editor does his best to put Tryton through its paces. Running Tryton proved to be a trying experience, though; this would not appear to be the accounting tool we are searching for. Tryton is a Python 3 application distributed under the GPLv3 license. Its home page mentions that it is based on PostgreSQL, but there is support for MySQL and SQLite as well. Tryton, it is said, is "a three-tier high-level general purpose application platform" that is "the core base of a complete business solution providing modularity, scalability and security". The "core base" part of that claim is relevant: Tryton may well be a solid base for the creation of a small-business accounting system, but it is not, out of the box, such a system itself.
  • Who should see Python deprecation warnings?
    As all Python developers discover sooner or later, Python is a rapidly evolving language whose community occasionally makes changes that can break existing programs. The switch to Python 3 is the most prominent example, but minor releases can include significant changes as well. The CPython interpreter can emit warnings for upcoming incompatible changes, giving developers time to prepare their code, but those warnings are suppressed and invisible by default. Work is afoot to make them visible, but doing so is not as straightforward as it might seem. In early November, one sub-thread of a big discussion on preparing for the Python 3.7 release focused on the await and async identifiers. They will become keywords in 3.7, meaning that any code using those names for any other purpose will break. Nick Coghlan observed that Python 3.6 does not warn about the use of those names, calling it "a fairly major oversight/bug". In truth, though, Python 3.6 does emit warnings in that case — but users rarely see them.