HDV DV for the Access Grid

1
HDV / DV for the Access Grid

• Jason Bell (jason.bell_at_arcs.org.au)
• Lev Lafayette (lev.lafayette_at_arcs.org.au)
• Padric McGee (padric.mcgee_at_arcs.org.au)
• Ashley Wright (ashley.wright_at_arcs.org.au)

Supported by
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Extending vic for DV / HDV in the AccessGrid

• The version of the HDV / DV services that will be
  highlighted is based upon the work that
• Chris Willing
• and
• Leon Zadorin
• from
• University of Queensland
• did to extend vic

3
High Quality

• What is high quality?
• better than H261
• better or equal to PAL/NTSC
• This project
• DV (firewire)?
• 420 encoded PAL size
• 411 encoded NTSC size
• HDV (firewire)?
• built in MPEG2 compressed
• H263

4
Comparison of H261, DV, HDV
5
Why vic?

• Why?
• familiarity
• cross platform compatibility
• ease of integration into AG toolkit
• multiple streams
• first test (H263) worked
• Why not DVTS (GIST's Ext.VideoSvc)?
• RFC but few implementations
• not really cross platform
• not really multiple streams

6
The Extended vic

• Based on ANL codebase
• Before the change over to the Sumover media tools
• Additional functionality via
• ffmpeg (codecs)?
• imlib2 (non-accelerated display)?

7
Networks

• DV 25Mb/s ctl audio 30Mb/s
  fec 36Mb/s
• HDV 25Mb/s fixed by in-camera MPEG2 encoder

8
Networks

• Tuning required
• network (NDT, iperf)?
• connection to network (network buffer sizes)?
• how vic/linux uses network
• tc tbf (traffic control token bucket filter)?
• pspacer (precise software pacer)?

9
Networks

• How to protect low bandwidth sites?
• new services allowing stream selection
  (need AG3.1)?
•  
• How to still include low bandwidth sites?
• send duplicate H261 stream

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New DVideoConsumerService
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Example
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SimpleHDVideoService

• Unlike the DVideoConsumerService, which uses a
  different multicast address for each stream
• The SimpleHDVideoService transmits all HDV/DV
  streams to the one address
• This means that you can see everyone's streams
  through the one vic application
• Like the standard H261 video service

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Current Status

• Linux
• capture rendering
•  WindowsXP
• rendering only alpha version only limited
  testing
• Anyone developer interested?
• OSX
• Anyone developer interested?

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Requirements

• DV camera (firewire)?
• or
• composite video with converter
• (canopus ADVC-55, ADVC-110)?
•  
• Hardware accelerated graphics card with xvideo
  blitter capability (NVidia)?

15
Future work

• Complete WindowsXP, OSX ports
• Integrate into UCL code base
• HD without latency
• YUV signal via HDMI
• Blackmagic Intensity IO board (USD250)?
• MPEG4 compression (ffmpeg library)?
• DXT compression?

16
Future work

• Planned bundled releases for Centos5, RHEL5 and
  Fedora9 in a couple of months
• Therefore, once the AG is installed for the above
  distributions, the HDV /DV will be included

17
Installation

• The HDV/DV services come pre-bundled with
• Slackware 12.1
• Ubuntu Hardy and Gutsy
• Debian Etch
• Install Guide for Fedora 8 (applicable for Fedora
  9) can be found at http//www.accessgrid.org/node/
  1099

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Download

• http//www.vislab.uq.edu.au
• gt Software downloads
• gt Advanced video (DV/HDV)?

19
Acknowledgements

• Chris Willing (UQ) for majority of presentation
  material

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• Questions???