Computer Science 1033A/B Study Guide - Final Guide: Betacam, Real Time Streaming Protocol, Sorenson Media

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VIDEO
Video uses the power of MOTION and SOUND
ANALOG VIDEO: smooth electronic waves (ex: Conventional TV)
DIGITAL VIDEO: converts into digital media (0s and 1s) benefit of delivering on internet
Composed of a series of bitmap graphics, each one called a frame
Motion in a video is an illusion caused by the rapid display of several still images or
frames
Movies display at 24-30 fps computer displayed video display at 12-15 fps
Characteristics:
Bits store Colour and Brightness data for each video frame
Retains image quality no matter how many times it is copied
Easily manipulated on a pc because stored in digital format
Kinds of digital videos:
Desktop video (DTV): constructed and displayed using a personal computer
Web-based video: incorporated in web pages and accessed with a browser
DVD-Video: used for commercial DVDs that contain feature-length films
PDA vide: small-format video designed to be viewed on a PDA or cell phone
screen
Creating digital video (first storyboard)
Produce Video Footage. Select equipment for filming videos and use effective
filming techniques
Transfer video footage to a computer. Use cable to cable transfer or a video
capture card to move video footage from cameras, videotapes, television, and
DVDs to your computer’s hard disk
Edit video footage. Use software to select video segments, arrange them into a
video, and add a soundtrack
Store and play video. Select digital video file formats for playback on desktop,
web, PDA, and DVD platforms
Ready to make a video
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Pre-Production stage: Planning the video and gathering any resources you might
need
Length of final video
Music or sounds, script or storyboard
Camcorder type and medium and format of final video
Production stage: Camera work and sound recording
Potential for a good shot is better if you understand how to use the
technical controls on camera (resolution, capturing action vs stills, night
vs daytime)
Post-production:
Downloading from camcorder to computer
Editing and/or encoding the finished video
Removing unwanted footage
Arranging desired footage in the correct order
Adding music, titles, transitions, and possibly other effects
Converting (encoding) into the correct format(s)
Post-Production
Capture video: download video from camcorder to computer
Edit Digital video (using computer, digital video software): edit it, add titles,
filters, transitions, superimpose clips, synchronize audio with video, authoring
software: create menus and interactivity
Output Video: output to different file formats back out to tape, the Web, CD,
DVD
Capturing Video must be in DIGITAL form to use in multimedia application. Process:
Video camera (analog video) (analog signal) Video card (digital signal) PC
Digital camera (digital signal) (Digital signal PC
Five Factors to consider when making a video:
1) Source Device: camcorders and digital video cameras can be used to capture full-motion
images (analog vs digital)
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2) Video Capture Device: video capture card needed (if using analog camcorder from
analog to digital)
No need if source device outputs a digital signal (such as Firewire or USB)
3) Connecting Leads: Firewire, USB cable
4) Computer: Download video to edit
5) Software: capturing, editing, outputting
Home video Edit facilities for: editing Home movies, creating TV productions,
manufacturing CDs, authoring and uploading internet material, internet video conferencing
Video Capture Device
Analog Camcorder: Need VIDEO CAPTURE CARD
Digital Camcorder: FIREWIRE connection
SOURCE DEVICE:
CAMCORDER (camera Recorder): device for recording video images and audio onto
a storage device. To use video in a multimedia application, it must be in digital form (1s
and 0s)
Analog vs. Digital camcorders:
ANALOG (older Technology)
DIGITAL (Newer Technology)
-Records electrical signals/pulses directly onto a medium
(like a tape) with a magnetic encoding
-Records binary code (string of 1s and 0s) compressed on
magnetic tape or other media
Disadvantage: Picture loses quality
Advantage: No image degradation
Video Capture card needed to convert video from
analog to digital for your computer
Plug video camera directly into computer via Firewire
(aka i.Link) or USB connection
These are digital connections and allow you to “dump”
footage straight from the camera to hard drive
ANALOG:
1983: VHS, VHS-C format (BetaMovie) No playback/rewind capabilities, 30 min
recording
1985: 8mm format smaller cassette size, 2 hr recording, higher recording quality
1990: Video8 (original) and Hi 8 format (improved) (types of 8mm)
Size comparison (smallest to largest): Mini-DV, VHS-C, VHS
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