blog/data/2008-12-28-dvswitch-on-usbstick.txt

   1 Title: Software video mixer on a USB stick
   2 Tags: english, nuug, video
   3 Date: 2008-12-28 15:40
   4
   5 <p>The <a href="http://www.nuug.no/">Norwegian Unix User Group</a> is
   6 recording our montly presentation on video, and recently we have
   7 worked on improving the quality of the recordings by mixing the slides
   8 directly with the video stream.  For this, we use the
   9 <a href="http://dvswitch.alioth.debian.org/">dvswitch</a> package from
  10 the Debian video team.  As this require quite one computer per video
  11 source, and NUUG do not have enough laptops available, we need to
  12 borrow laptops.  And to avoid having to install extra software on
  13 these borrwed laptops, I have wrapped up all the programs needed on a
  14 bootable USB stick.  The software required is dvswitch with assosiated
  15 source, sink and mixer applications and
  16 <a href="http://www.kinodv.org/">dvgrab</a>.  To allow this setup to
  17 work without any configuration, I've patched dvswitch to use
  18 <a href="http://www.avahi.org/">avahi</a> to connect the various parts
  19 together.  And to allow us to use laptops without firewire plugs, I
  20 upgraded dvgrab to the one from Debian/unstable to get one that work
  21 with USB sources.  We have not yet tested this setup in a production
  22 setup, but I hope it will work properly, and allow us to set up a
  23 video mixer in a very short time frame.  We will need it for
  24 <a href="http://www.goopen.no/">Go Open 2009</a>.</p>
  25
  26 <p><a href="http://www.nuug.no/pub/video/bin/usbstick-dvswitch.img.gz">The
  27 USB image</a> is for a 1 GB memory stick, but can be used on any
  28 larger stick as well.</p>