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Video Capture and Editing. Capture Devices and Video Encoding Standards. B.Sc. (Hons) Multimedia Computing. Media Technologies. Agenda. Devices Connectivity Compression / Decompression (CODECS) Export formats MPEG-4 Cinipac Sorenson Spark Deployment Support for Legacy Formats.

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capture devices and video encoding standards

Video Capture and Editing

Capture Devices and Video Encoding Standards

B.Sc. (Hons) Multimedia Computing

Media Technologies

agenda
Agenda
  • Devices
  • Connectivity
  • Compression / Decompression (CODECS)
  • Export formats
    • MPEG-4
    • Cinipac
    • Sorenson Spark
  • Deployment
  • Support for Legacy Formats

B.Sc. (Hons) Multimedia Computing

Media Technologies

capture devices
Capture Devices
  • PCI Card (PC)
  • FireWire port on Mac( Developed by Apple) & PC
  • USB Port
  • Video Camera
  • Web Camera
connectivity
Connectivity

SCART Plugs and Sockets

Phono Leads (RCA)

Video in

Audio in left

Audio in right

connectivity5
Connectivity

Audio Left (White)

Video (Yellow)

S-VHS

Audio Right (Red)

the serial digital interface firewire
The Serial Digital Interface ‘Firewire’
  • Originally developed by Apple as the IEE1394 Serial Digital Interface
  • Refereed to as FireWire
  • Simple and highly efficient method of not only transferring digital signals between devices
  • Most Camcorders have DVout which can be connected to computer Firewire Port via appropriate lead
  • Two connector sizes, four pin - Camcorder, and six pin - computer
the serial digital interface firewire7
The Serial Digital Interface ‘Firewire’
  • Connection between computer and camcorder enables users to control the camcorder playback
  • Where suitably equipped DV-in camcorders are present - recording functions using the on-screen controls of the appropriate program
compression decompression codecs
Compression & Decompression ‘CODECS’
  • Need CODEC on system to play movie or extract compressed data to load into an editing application ( Premiere) etc.
  • Some CODECS not well-supported across platforms
  • MPEG is best for multimedia
  • Sorenson via Flash MX best solution
export formats
Export Formats
  • Cinepac (Radius)
  • MPEG
  • Sorenson Spark
  • Video for Windows (Indeo)
  • File types:
    • avi (Windows)
    • mpg. (MPEG)
    • Mov (Quicktime)
deployment
Deployment
  • Compromises required to bring resource requirements of video within capabilities of delivery medium ( e.g networks) and low-end machines
  • Reduce frame size - down sample to quarter frame size - i.e. 320x240 pixels
  • Reduce sample rate (12 or 15 fps is OK for smoothmotion, flicker not a problem on computer
  • Reduce colour depth
support for legacy formats
Support for Legacy Formats
  • Betamax
  • Video 8
  • VHS

Director Final Cut

Video Transfer Interface Devices

references
References
  • Digital Multimedia 2nd EditionChapman N. Chapman J. Wiley. 2004
  • http://www.cinepak.com/
  • http://www.mpeg.org/
  • http://www.sorenson.com/

B.Sc. (Hons) Multimedia Computing

Media Technologies

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