Miniconf timetable

The following is the timetable for the the Multimedia and Music Miniconf.

9:00-10:00 - Welcome and first keynote (Llewellyn Hall)

10:00-10:40 - Morning tea (catered)

10:40-12:20 - Media tools

12:20-13:20 - Lunch (uncatered)

13:20-15:00 - Media streaming and playback

15:00-15:40 - Afternoon tea (catered)

15:40-17:20 - Audio/music session


  • Eric McCreath: Audio / Video encoding and the clapperWebCamRecorder (50 minutes)
This talk will explore audio and video encoding formats with the objective of giving people a basic understanding of encoding approaches along with some basic ideas of how to include video/audio content within an application they are developing. This will include: an overview of container formats, a background to RGB and YUV image formats, how video data is transformed into a frequency domain (often using the discrete cosine transform DCT) and quantised at various level of accuracy to produce compression without a large loss in visual quality, how reference frames along with motion vectors are used in predicting frames, a brief overview of Huffman encoding, and how this is all combined to produce the final video stream.
This will all be demonstrated in the context of a simple open source application I have been working on called "clapperWebCamRecorder".
  • Andrew Pam: Open art and content creation tools (20 minutes)
This talk will cover the use of open content creation tools and art resources as used in the creation of games and other multimedia frameworks.
  • Tim Ansell: Fun with GStreamer Pipelines! (20 minutes)
Gstreamer brings the UNIX philosophy to multimedia processing. Stringing together small independent blocks into pipelines you can build powerful multimedia applications doing minimal work. Come and learn some cool and wacky pipelines which do everything from creepy face tracking to watching streaming to YouTube without Flash.
  • Silvia Pfeiffer: Browsers and HTML5 video accessibility (20 minutes)
I've talked a lot about the specs for captions and other accessibility tools in the past. This time I will give a reality check and demonstrate what is actually implemented in browsers and can be used today.
  • Jonathan Woithe: Sound effects triggering with Tttrigger (20 minutes)
Tttrigger is a simple but flexible way to trigger sounds for theatre and other live performance situations. This presentation will introduce the program, demonstrate its current capabilities, illustrate a few rough edges and discuss what might be coming.
  • Sheeri Cabral: Getting started with a Podcast (50 minutes)
This session will discuss how to get started podcasting. Tips and tricks to make your podcast run smoothly will be revealed, as well as how to get the word out there that your podcast exists. There will also be technical information on using audio software and hardware.
  • Jan Schmidt: Home area entertainment with GStreamer (50 minutes)
Due to changed personal circumstances this speaker has withdrawn.

This talk looks at an implementation of a multi-room entertainment system - allowing synchronised playback of music or movies in multiple rooms simultaneously. Commercial implementations of such systems (squeezebox, Sonos, AirPlay) can be costly - but the basic mechanism is not that complex.
  • Pia Waugh: Remixing with FOSS (50 minutes)
Pia has been doing recording and remixes for a few years now, using all FOSS tools. This session will look at some of her techniques (all self taught, nothing fancy), and she'll show some tools that work for remixing existing tracks, creating percussion tracks, recording live instruments and trying to get it all sounding good. She'll probably even do a live remix for the talk as a demonstration.
  • Jonathan Mettes: Slide guitar construction workship (50 minutes)
For the final presentation of the day we're going to do something a little different: Jonathan Mettes will guide participants in the construction of a slide guitar out of readily available parts. Attendees wishing to take part in the build will need to pay Jonathan on the day for parts (an amount of no more than $10). Interested observers are more than welcome to attend too. To help gauge numbers, we ask that those wishing to purchase parts email Jonathan Mettes (jmettes at to register interest. The number of constructors will be limited; first come first served. At the conclusion of the workshop, participants will have a working slide guitar which they can then use to experiment with many of the fine FOSS music programs.