Wednesday, February 10, 2010

How I record screencasts for Pharocasts

... on Linux. I use xvidcap for recording and avidemux for video editing. Both are really easy to use and stable.

So now, dear Pharo and Linux user, you know how to contribute to Pharocasts ;). To publish on Pharocasts, contact me.

Download screencast (960x720): .mpeg 19.0 MB, .mov 28.8 MB


  1. Thanks, Laurent, for the tips. I want to contribute, in a near future. I have a similar software system: linux and KDE, and I tried to use xvidcap, but I couldn't record the audio at the same time, and normally your videocasts also don't have audio. It's your choice, or a limitation? At the xvidcap website, the FAQ say something about the requirement to be a OSS compatible audio manager. You have any experience with the system configuration? Anyway, thanks for all the useful information, and your good work.

  2. No audio is my choice because I don't have a good microphone nor a good English accent :)
    Have you tried installing alsa-oss package (or similar, I use Archlinux) ?
    May be you can record sound later using Audacity or other audio recording software.
    I haven't tried recording audio with xvidcap, I will.

  3. I've just tried with sound and it works. Check:
    - capture is enabled in your audio mixer, capture source, input gain.
    - "Enable audio" checked in xvidcap preferences, multi-frame mode tab. Input device is /dev/dsp (on my machine).

  4. What is the acceleration factor you use to speed up the video?

  5. x1.6 to x1.8. Depends on how fast you type and manipulate your environment.

    A trick is that you should feel the video a little too slow as you already know the manipulations.


Note: Only a member of this blog may post a comment.