Audio from linux.conf.au 2005

    I've been asked quite a few times as to the status of the audio from the 2005 linux.conf.au conference, so I thought I would grapple with the issues involved here, so that everyone knows. The short answer is that there doesn't appear to be any audio... Read on for a summary of why.

    Speex

    The linux.conf.au 2005 committee did have machines record speex in every lecture theatre at the conference. These were the same machines which were displaying those slide shows when the project wasn't in use. It would appear that there was a hardware issue on those machines, as they all have recorded fairly large amounts of garbage data. I can't comment much further than that, as I wasn't involved with the setup of the machines, or the diagnosis of the problem.

    Video recordings

    But wait. There were all those video machines in the back of the theatres (or at least the big three). They'd be recording video wouldn't they? Well, they were. It turns out that the audio streams generated from those cameras and their audio system hookup are corrupt. Apparently, and again I haven't looked into this myself, the time stamping in the files is bogus, so the audio data can't reliably be extracted. It would seem that about 25% of each talk can be extracted.

    So where to from here?

    Well, all of that is a bit of a bummer really. Our current plan is to put the dodgy ogg video files online for people to download and try to help us out with the extraction of the audio. The problem with this is that we're talking about a fair bit of data here -- 25 gig to be exact. Linux Australia has recently rolled out a mirror project which I am associated with which will be able to host these files, but it's a case of actually getting the hardware (it's on order), configuring it, testing it, and then deploying it. I would expect this to take around another month from now.

    I've put a random sample of the ogg video on my site if people want to have a poke before then and see if they have suggestions. This video file, assuming I have worked out the file naming convention properly, should be the start of Eben Moglen's keynote presentation. The file isn't too big (around 30 megabytes) so feel free to download it and give it a try.

    I do apologise for the inconvenience the loss of data has causes, despite there really being nothing I could have done about it. I do find it a little embarrassing that this has happened. If you could please refer further comments to the conference organisers list that would be nice.

    Update: One of the guys at work thinks "I can't comment much further than that, as I wasn't involved with the setup of the machines, or the diagnosis of the problem." sounds self righteous, so I thought I should clarify and point out that I didn't mean it that way. What I am trying to convey here is that I would have liked to supply more technical detail as to what happened, but I don't know any.

    Tags for this post: blog lca2005 conference opensource audio corruption data loss
    Related posts: Audio from linux.conf.au 2005 continued; Why is a CD the length it is?; Generally poor audio quality on pod casts?; On freely available guide data; Breaking: Zap2IT turning off guide data for the US?; ImageMagick book - Chapter 3: Compression and Other Metadata

posted at: 20:49 | path: /diary/lca2005 | permanent link to this entry