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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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Video Capture and Editing

Capture Devices and Video Encoding Standards

B.Sc. (Hons) Multimedia Computing

Media Technologies


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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


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Capture Devices

  • PCI Card (PC)

  • FireWire port on Mac( Developed by Apple) & PC

  • USB Port

  • Video Camera

  • Web Camera


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Connectivity

SCART Plugs and Sockets

Phono Leads (RCA)

Video in

Audio in left

Audio in right


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Connectivity

Audio Left (White)

Video (Yellow)

S-VHS

Audio Right (Red)


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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


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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


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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


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Export Formats

  • Cinepac (Radius)

  • MPEG

  • Sorenson Spark

  • Video for Windows (Indeo)

  • File types:

    • avi (Windows)

    • mpg. (MPEG)

    • Mov (Quicktime)


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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


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Support for Legacy Formats

  • Betamax

  • Video 8

  • VHS

Director Final Cut

Video Transfer Interface Devices


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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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