X-Git-Url: https://git.decadent.org.uk/gitweb/?p=lca-dvswitch.git;a=blobdiff_plain;f=index.html;h=ae10127caf46ad364d531e5830ca65ddb4afafed;hp=3d506df9d386a6acaf3e393bdbd69746d33f530a;hb=10c860eebb181fcef72f1b01c9ccf839c818487f;hpb=00e98dddff05fa6becc1ff972f179838ee4204b8 diff --git a/index.html b/index.html index 3d506df..ae10127 100644 --- a/index.html +++ b/index.html @@ -4,7 +4,7 @@ -DVswitch - Ben Hutchings - LCA2011 +Making great conference videos on a budget - Ben Hutchings - LCA2011 @@ -23,6 +23,9 @@ th { border-bottom: 2pt solid black } th, td { padding: 0 6pt } + @@ -36,7 +39,7 @@ @@ -45,7 +48,7 @@
-

DVswitch

+

Making great conference videos
on a budget

Ben Hutchings

@@ -96,8 +99,8 @@ Now used more widely, often without streaming
  • - Mixing is live - required for streaming, and avoids the - need for extensive editing after the event + Mixing is live - required for streaming, and avoids + extensive editing after the event
  • Mixing is interactive - required for good coverage of @@ -180,10 +183,13 @@

    Overview of the system

    -

    - A simplified view of the typical components: -

    - + +
    +

    + This is a simplified view of the typical components. The system + is completely flexible as to which sinks and sources are used. +

    +
    @@ -254,12 +260,85 @@

    Mixer UI

    - +

    Mixer UI, annotated

    - + +
    + +
    +

    Mixer internals

    + +
    +

    + To simplify the diagram, I omitted connection setup, tally light + and recording control, and the internal sinks that haven't been + implemented yet. +

    +

    + All these interfaces have limited-length queues. If a queue + fills up, frames have to be dropped - we must not block or use + unlimited memory! +

    +

    + The mixer clock thread maintains a frame clock at about 25 or + 30 Hz depending on the video system, constantly adjusted to + follow the audio source. +

    +
    +
    + +
    +

    Icecast streaming server

    +
      +
    • + Simple HTTP streaming server supporting MP3, Ogg Vorbis and + Ogg Theora streams +
      • +
    • + Each stream is provided by an authenticated source client or + relayed from another server +
      • +
    • + Relaying allows you to build a distribution network serving + viewers inside and outside the conference +
      • +
    +
    + +
    +

    Icecast distribution network

    + +
      +
    • + Internal master serves internal viewers and external master +
      • +
    • + Public servers serve viewers anywhere +
      • +
    • + Relaying restricted by password and/or firewall +
      • +
    +
    + +
    +

    Further information

    +