Capture Devices and Video Encoding Standards B.Sc. (Hons) Multimedia ComputingMedia Technologies Video Capture and Editing.

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Presentation transcript:

Capture Devices and Video Encoding Standards B.Sc. (Hons) Multimedia ComputingMedia Technologies Video Capture and Editing

Agenda Devices Connectivity Compression / Decompression (CODECS) Export formats MPEG-4 Cinipac Sorenson Spark Deployment Support for Legacy Formats B.Sc. (Hons) Multimedia ComputingMedia Technologies

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

Connectivity SCART Plugs and Sockets Phono Leads (RCA) Video in Audio in left Audio in right

Connectivity S-VHS Video (Yellow) Audio Right (Red) Audio Left (White)

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 ‘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’ 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 Cinepac (Radius) MPEG Sorenson Spark Video for Windows (Indeo) File types: avi (Windows) mpg. (MPEG) Mov (Quicktime)

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 smooth motion, flicker not a problem on computer Reduce colour depth

Support for Legacy Formats Betamax Video 8 VHS Director Final Cut Video Transfer Interface Devices

References B.Sc. (Hons) Multimedia ComputingMedia Technologies Digital Multimedia 2nd Edition Chapman N. Chapman J. Wiley