digital video - university of · pdf file• what is digital video dv ... • europe,...
TRANSCRIPT
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Digital Video
Part I: Introduction & Camcorders
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• Introduction to Digital Video
• What is Digital Video DV
• History of Analog and DV
• Digital vs. Analog Video
• Camcorder Overview
• Features to look for
• Video Tape Formats
• Filming Techniques & Tips
We Will Cover
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• Video Editing (covered in Part II)
• iMovie (covered in Part II)
• Final Cut Pro
• Other Digital Video Applications
• Video Production Tips (covered in Part II & III)
• Distribution of Videos (covered in Part II & III)
We Will NOT Cover
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• Video Editing History
• What is Digital Video (DV)
• Video formats
• Personal Camcorders
• Professional High End Camcorders
• Filming Techniques
Class Overview
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• 1990, 13 years ago: $200,000
• 1995, 8 years ago: $8,000
• Now: $1,100 for an iMac and DV camcorder
• New education price
• Used/refurbished/demo even cheaper!
• Quality better than ever before
Video Editing History
+ iMovie+ + iDVD
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• Digital
• 1’s and 0’s
• Analog
• Continuous tone
• Why does it matter?
• Degradation...
Digital vs. Analog
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• Analog
• Continuous tone
• Rainbow -
All the colors
• Original
• After Time
What is Analog?
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• Analog tapes degrade
• Over time
• With each play back
The Analog Problem
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• Digital
• 1’s and 0’s
• Original
••• After Time
What is Digital?
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• Becoming the most popular consumer purchase
• Camcorder Sales
• DVD Player Sales
• Digital Camera Sales
Analog Tape Scratches & Fades
Digital lasts forever, or ten years,
which ever comes first!”
Why Go Digital?
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• What are standards about?
• Frames per second
• Pixel resolution
• Several standards
• NTSC
• PAL
• SECAM
Why Video Standards?
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• What devices does this apply to?
• TV’s
• VCR’s
• DVD’s
• Camcorders
• Computer file formats
Devices & Standards
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• What is a frame?
What is a Frame
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• What is Pixel?
• What is Pixel resolution?
What is a Pixel?
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• NTSC (National TV Standards Committee)
• America, Japan, 30 others
• 29.9 fps
• About 30 fps
• 720x480 pixels
NTSC Video Standard
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• PAL (Phase Alternating Line)
• Europe, Africa, Middle East, Australia, China, etc.
• 25 fps
• 720 x 576 pixels
PAL Video Standard
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• SECAM (SEquential Couleur Avec Memoire)
• France, parts of Africa, some Soviet countries
• Same size as PAL, but not compatible
• 25 fps
• 720 x 576 pixels
SECAM Video Standard
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• VHS
• S-VHS
• VHS-C
• 8mm
• Hi8
Analog Camcorders
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• VHS
• 1.5 foot long
• Heavy
• Shoulder rest
• Use full size VHS tapes
• 1980's
• Only a few sold today
VHS Camcorders
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• S-VHS (Super-VHS)
• Uses special S-VHS tapes
• Requires special, expensive equipment and jacks
• Sharper video quality than VHS
• Inexpensive ($300-$400)
S-VHS Camcorders
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• VHS-C (VHS-compact)
• Tapes smaller than S-VHS
and VHS
• Requires special adapter
• Clever but a nuisance
• Inexpensive ($200-$300)
VHS-C Camcorders
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• 8mm
• Tapes smaller than VHS-C
• VCR's can't play 8mm tapes
• Camcorder connects to TV/VCR
for playback
• Inexpensive ($200-$300)
• Popular among people
without computers
8mm Camcorders
Audio cassette 8mm
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• Hi8
• Higher quality than 8mm
• Tapes same size as 8mm
• Inexpensive ($200-$400)
Hi8 Camcorders
Audio cassette 8mm
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• Media Converter
• Converts analog to digital
• About $300
• Several different manufacturers
Converting Analog
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• Benefits of digital
• Smallest camcorders (size of a walkman)
• Smallest tapes
• Batteries last longer
• Quality better than analog
• Easier to transfer to computer
Digital Benefits
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• 2 families of DV camcorders
• Professional
• VERY Expensive ($4,500+)
• Very expandable
• Interchangeable lenses
• Large
• 3 CCD
• Consumer
• Cheap ($400-$800)
• 1 CCD
• Limited expandability
Professional vs. Personal
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• DV camcorders 1 or more CCD’s
• The eye, aka CCD
(Charged Coupled Device)
• Personal – 1 CCD
• Professional
• 3 CCD - Red Green Blue
• Better color accuracy
• Records low light
CCD
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• Professional DV camcorders
• 3 CCD - Red Green Blue
• Better color accuracy
• Records low light
Professional
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• Personal camcorders
• 1 CCD
• All colors
• Red
• Green
• Blue
• Cheap
Personal
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• Also called DV Camcorders
• Digital8
• DVD
• MiniDisc
• MicroMV
• MiniDV
Digital Camcorders
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• Digital8
• Same 8mm tape as Hi8
• Can play 8mm and Hi8 tapes
• Data stored digitally
• Quality better than analog 8mm and Hi8
• Quality not as good as other digital formats
Digital8
Audio cassette 8mm
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• DVD
• Record onto DVD
• New, not many models
• 2 - 4 models?
• Expensive ($500-$1000)
DVD
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• MiniDisc
• Similar to DVD camcorders
• New, only a few models
• Expensive ($800)
• Smaller discs
• Quality not as good
MiniDisc
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• MicroMV
• Sony only
• New
• MPEG-2 compressed
• Tiny tapes 5.3 mm x 3.8 mm
• Expensive ($1000-$1500)
• Does not work with Macintosh
MicroMV
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• MiniDV camcorders
• The standard
• Start at $300 (no price limit)
• Tape smaller than 8mm
• Best quality
• Picture quality better than digital satellite
• Better audio quality than CD's
• No copy degradation
MiniDV
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• Many features
• Some required
• Some nice
• Some useless and even harmful
• Not everyone agrees what is best
• The following is listed most important first
(according to us)
MiniDV Features
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• FireWirea.k.a. “DV in/out”, “DV terminal”, “IEEE-1394”, “i-Link”
• Some older European camcorders have DV out but not DV in
• Some companies make cameras with bad FireWire ports
• Stick with the popular ones
FireWire
4 Pin Unpowered 6 Pin Powered
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• Analog Inputs
• Import/export VHS easily
• S-Video most common
• Or RCA
Analog & S-Video
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• LCD
• Bigger is better
• 2.5” to 3.5” normal
• Flexible
• Reversible
• Swiveling capability
Features – LCD
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• Image Stabilizer
• Optical - Best
• Prism that moves oppositedirection of shaking camera
• Electronic - OK
• Motion sensors try to compensate
• Digital - Reduces video area
• Zooms in and crops
Features – Stabilizer
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• Optical zoom
• Actual zoom - telescoping lens
• “12X/300X” - Optical = 12X, Digital = 300X
Features – Zoom
Full frame Optical zoom Digital zoom
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• Zooming
• Good
• Variable-speed zooming
• Variable knob
• Bad
• One-speed zooming
• 2 buttons
Features – Zooming
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• Manual override
• Focus
• When filming through bushes
• Exposure
• When filming in bad lighting conditions
Features – Manual
Wallaby
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• Manual override Focus example
Features – Manual Focus
Wallaby Out of Focus Wallaby In Focus
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• Battery indicator
• Digital icon for battery
• Digital time-remaining for battery
• Digital icon for battery
• Not very helpful
Features – Battery Time
1hr 43 mins
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• Light
• Built-in light
• External light attachment
Features – Built-in Light
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• Available on many camcorders
• Exposure Options
• Backlight mode
• FlexiZone
• Night-vision mode
• Progressive-scan
• Still-camera mode
•
Features – Seldom Used
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• Exposure Options
• Preprogrammed exposure options
• Canned focus/shutter speed/aperture, etc
• Spotlight
• Sports
• Sand/Snow
• Low Light
Features – Exposure
“Low light” mode on
“Low light” mode off
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• Backlight mode
• Turns auto exposure off
• Picture will be overexposed
Features – Backlight
Backlight mode off Backlight mode on
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• FlexiZone (a.k.a. PushFocus)
• Lets you move the camera’s point of focus
• Great for follow moving objects
• background doesn’t change
Features – FlexiZone
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• Night-vision mode
• Expect this to improve
Features – Night-Vision
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• Progressive-scan CCD (vs. interlaced)
Features – Progressive-scan
Progressive scan Interlaced
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• Still-camera mode
• Most DV cams are a miserable
• 640 x 480 pixels
• (0.3 megapixels)
Features – Still-Camera
Real digital still camera2272x1704 pixels
(4.1 MP)DV cam “still camera” mode 640x480 pixels
(0.3 MP)
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• Features rarely used
• Control-L or LANC
Rarely Used Features
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• NEVER use these features
• Undesirable features
• Title generator
• Fader
• Audio dubbing
• Special effects
• Date/time stamp
• Built-in editing
• Why
• Permanent edits
• easier to do on a computer than a camcorder
NEVER Used Features
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Companies with a good reputation
Canon
JVC
Panasonic
SONY
Brand Names To Choose
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• Local Stores
• TV Specialists
• State employees get a discount
• Online
• http://www.shopper.cnet.com
• http://www.dealtime.com
• http://www.eBay.com
• http://www.frys.com
Where To Purchase
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• 2 Modes
• VTR (VCR)
• Play
• Rewind/fast-forward
• Stop
• Camera
• Record
• READ THE MANUAL!!!!
Camcorder Operation
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• External microphone
Audio Tip – External Mic
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• Stabilization
• Use tripod, monopod, or clamp
• Put left hand UNDER camcorder
• Use image stabilization
• Stay zoomed out
Video Tip – Stabilizers
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• Panning
• Only do when needed
• Linger; pan; linger
• Start on good scene, end on good image
• Practice panning
• Pan towards right
• Follow moving objects or visual "lines"
• Turn image stabilizer off
Video Tip – Panning
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• Zooming
• Don't zoom while recording
• Instead, use dolly shots, with a wheelchair or bike or whatever
• Or, record and linger; pause recording and zoom; record and linger
• Exceptions: zoom as slow as possible, zoom when panning
• (practice these techniques)
Video Tip – Zooming
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• Lighting
• Make sure there is enough, but not too much
• Setup extra lights if needed
• Three point light system
Front, Side & Background
• Use backlight mode if needed and if camcorder has the feature
• Learn the camcorder exposure settings
Video Tip – Lighting
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• Focus
• Auto focus is OK most of the time
• Manual focus
• When there are no defined edges
• When there are objects between the camcorder and the subject
Video Tip – Focus
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• Angles
• Use a variety of angles
• Don't break the 180-degree rule
• Unless the camera is rolling whole time
Video Tip – Angles
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• Your turn to test drive the camcorders
• But first...
• Next class
• Survey
• Contact information
• Questions and answers
•
Finishing Up
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• Digital Video - Part 2
Friday November 14, 2003
9:00 AM — 10:00 AM
MMC 1745
• Introduction to editing and distribution
• How to import
• How to edit
• How to publish
Next Class
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How did we do?
Please take a minute to fill out the survey.
Survey
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• Web — www.macos.utah.edu
• Email — [email protected]
• Offices — Multimedia Center (Room 1705), ask at the service counter for someone from the “Mac Group.”
Contact Information
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Questions & Answers
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