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Published by qiqienkikien, 2019-01-21 22:31:21

Video Tech iLab

Video Tech iLab




The world of education has undergone tremendous progress. This change not only involves the
philosophy and content of the lessons alone, but also changes in the teaching methods and the
technology used in teaching and learning process. Along with the advancement and development
of pedagogy, application and technology, the use of Virtual Reality (VR) and Augmented Reality (AR)
in education is indispensable today. AR is a technology that allows computer-generated virtual
imagery information to be overlaid onto a live direct or indirect real-world environment in real time.
The application Video Tech iLab (VtiL) focuses on using VR and AR technology for creating interactive
lab sheet to learn video technology. This application contains video learning lab sheets; Video Studio
in 360, Video Shot Types and the Basic Camera Moves. This application is developed using Google
Cardboard for 360 video and HP reveal software which combines the AR technology and the sensor
functions on mobile devices to enable the content to be viewed by the users. It is hope that VTiL can
help the students understand the video technology in a more interactive and engaging learning
environment, and the students can control their own way of learning, while making their learning more



IN 360

This section is broken into the 5 key elements that you’ll need for your studio:

1. Green screen backdrop
2. Lighting
3. Monopod
4. Tripod
5. Camera


What is Green Screen?

Green screen known as chroma key is a kind of special video effect often used in filming.
The idea is to create the pure green background which is then made transparent and
replaced with different virtual backgrounds that we want. In this way we can superimpose
anything or anyone onto virtual background so as to create some amazing visual effect.

There are huge benefits of using green screen. Green screen not only saves time, costs and
improves video quality, but it helps us to setup and film in locations where we normally
couldn’t do it. Some of the benefits are:

1. No need to find a nice location to shoot in

Typically the first thing we will take into account before recording a video is to find a
nice location or background of a video so that the recorded video will look
attractive and professional.

Recording videos in noisy situations with the movement of other objects may
interfere the video recording process. These problems can be solved with a green
screen where video recording can be done in a studio or a special recording room
and we can replace the background and make the video look good after the
editing process.

2. Setup once and leave

A huge barrier that we face during video recording is the amount of time we spend
to setup and pack up all the gear including the lights, cameras and etc. When
moving everything into a green screen room, we will able to leave all the lights and
everything setup permanently. We didn’t have to setup and pack up every time we
want to shoot and it make the whole process much faster.

3. Get realistic backgrounds

Green screen allow us to put the subject anywhere we want. With the current video
editing software, green screen can be done in just a few mouse clicks.


5 Tips for Shooting
Better Green Screen

5 tips when you shooting a video for compositing a green screen video, which covering the
lighting tips, the camera tips, the clothing tips, the tips for using green screen sheet, and the
tips for resolving motion blur in shooting videos.


Lighting tips in shooting a Green
Screen Video

To shoot a nice green screen video, it's
better to be able to light the
background and the subject
separately. It allows you to fully control
the intensity and color saturation of
the green screen. You are free to light
your subject as you wish and avoid
any shadows falling on the
background. So typically two or more
lights are used to light the green
screen. Adjust the light positions and
filters until you get the satisfying result.
If your subject is human, it requires 6-10
feet between your subject and the

Don’t throw too much light onto the green background. That will create hotspots and
“green spill” on the subject and make the key less effective. The key to lighting a green
screen is consistency – create a single, consistent shade of color across the entire screen.


2 Camera tips in shooting a Green Screen Video

When lighting your key surface, make
sure the bounce light is not directed at
the camera (as shown in the image
above). For example, if your camera
faces the key surface directly, set your
lights at 45 degree angles to the key
surface. This will ensure that the bounce
light bounces toward the other light and
not at the camera.

Also choose carefully the camera as
some cameras are better to shoot green
screen video, especially if you are
shooting something with a bit of
movement. Then shoot your video as HD
quality video (720p or higher) and save
in a format your green screen software
can import.

When shooting the green screen video, it's of great importance to keep the camera very
still and a tripod is necessary for this purpose. The simplest shot is to captures the whole body
in the center of the cloth so that none of the peripheral edges of the room can been seen.
Another general rule is that it's better to lose legs in a shot than the head of an individual.
Although sometimes it's essential to film a perspective that break these rules, many problems
can be overcome in the editing process.


Clothing tips in shooting a Green
Screen Video

There are some mistakes that you
can avoid to help your green
screen video look more
professional and more realistic.
Perhaps one of the simplest
mistakes that many people make
with green screen video shooting is actually wearing green clothing. If you are wearing
clothing or clothing that has buttons or accents that are a similar color green as your
selected background green, the image that you project onto the green screen in post-
editing will also get picked up by these accents on your clothing or by the clothing itself. This
is great if you want to cut off part of an actor's body, but not so professional if you are trying
to make an actor appear in a realistic scene.



Wrinkles problem in shooting a
Green Screen Video

Wrinkles in your screen can
actually lead to heavy shadows
and distorted image quality in your
green screen video. If you regularly
fold your green screen for storage
it's very important that you take an
iron out and flat negative green
screen to prevent shadows and
distortions with your background
image. This is a step that many skip
over but it's important to have a
high-quality green screen without
wrinkles and folds that cause


Motion blur problem in
shooting a Green Screen

If you are planning on
shooting a high action
scene in front of a green
screen with a camera that
only has lower shutter
speeds, you can run into
real problems. When using a
camera with a lower shutter speed consider doing action shots in slow motion or getting
subjects to not make any sudden movements in front of the green screen. Motion blur from
someone moving rapidly on camera in front of a green screen can really ruin the scene and
ruin the realism of the scene.

Alternately you could also consider renting a high shutter speed camera to avoid this motion
blur if you do plan on shooting a lot of action scenes. Ultimately this is something that you
will need to test for yourself before shooting a green screen video, so that you can get a
feel for how much action your camera can handle with a green screen without motion blur.



Lighting your video shoot can be tricky. There is a big difference in how our eyes perceive
light compared to a camera lens. Cameras need way more light to produce a quality video
than you might imagine. But there are further tones of light and shadow to consider when
planning a video shoot.

3-point light setup

The most common setup for lights is called 3 point lighting. This configuration consists of a
key light, a fill light, and a backlight.
Key Light

The key light is exactly that, the main light. It should
provide the dominant lighting for the subject.
The key light should be brightest of the three and
provides the bulk of light to your subject. Ideally, this
lighting should be pointed 45 degrees upward and
off the camera axis.

Fill Light
The fill light eliminates shadows caused by the key
light. Your fill should be less intense than your key
so while it still eliminates shadows, but doesn’t a
flat looking shot due to the fill and key lights
matching too closely.

The backlight gives a pleasing depth to the shot,
separates your subject from the background and also
preventing a flat looking shot.
It should be placed behind the subject and should
provide light on the head and shoulders.
Your backlight can be hard light (no diffusion), as it
won’t create shadows visible to the camera on the
subjects face.



In any kind of photography or filming, image quality and shooting experience don’t depend
solely on the camera and the lens. Sometimes, handheld shooting results in blurry images
and tired arms and back. You’ll need equipment that will help you get sharp photos and
videos, support your camera, and make yourself comfortable and safe while shooting.
When it comes to that, a tripod easily comes to mind. But then another camera support
system is also worth is that simple and trusty monopod.

What is a monopod?

A monopod, called a unipod is a one-legged camera support system for precise and stable

Why use a monopod when a tripod will do?
 one-legged tool

 more compact and lighter package
 easy setup and portability

 when available space isn’t enough for a tripod
 when the use of a tripod isn’t allowed

 when shooting a lot of movements and following the

 safer to use than tripods, which can get in the way
and may cause people to trip and fall.


6 Tips When
Choosing The Best

1 Load capacity – Check the maximum load
rating of your monopod choices and make
sure the one you get is at least equal to the
combined weight of your camera and lens (if
you’re using multiple photo gear, consider
the heaviest ones).

Maximum height – This feature is especially

2important to tall people, as a monopod that

can extend high enough ensures that the
photographer will be in a natural and
comfortable position while using it. To find out
the right monopod height for you, measure
the distance from the ground to your eye

3 Weight – Heavy-duty monopods are heavier
than their lightweight counterparts, so they’re
stable and durable camera support systems.
However, if you need to travel light such as
when you go hiking, compact and
lightweight monopods that are great for
travel photography will minimize your load.

Material – The best camera monopod is made of

4either aluminum or carbon fiber. Aluminum is

tough, lightweight, and corrosion resistant.
Carbon fiber is lighter than aluminum but is just as

5 Leg sections – If your priority is ease of setup, go
for a monopod with fewer leg sections. But if you
prefer portability, choose one with more
collapsible leg sections because it’s easier to
carry around than a monopod that has fewer leg
sections with longer collapsed size.

Feet – Do you like the stability that a tripod

6provides but hate the large space it occupies?

Then a monopod with feet is perfect for you.
Monopods with feet are like a smaller version of
tripods with small legs and a big leg at the center.



A tripod is a three-
legged camera stand
that stabilizes your
shot. Using the tripod
can help you take
sharper photographs,
even in poor lighting.

A tripod is used to
stabilize and elevate a
camera, a flash unit, or
other photographic

All photographic
tripods have three legs
and a mounting head
to couple with a

The mounting head
usually includes a
thumbscrew that
mates to a female
threaded receptacle
on the camera, as
well as a mechanism
to be able to rotate
and tilt the camera
when it is mounted on
the tripod.


Tripod Parts


How to Setup a Tripod?

1 Decide on your location Before you start setting up your tripod, it is best to know

where you want to take your photo. Be sure the backdrop will work for your photograph,
and decide on the direction you will want to take your photo.

2 Arrange the legs Point one of the legs in the same direction that your camera will face.

Doing so will create a space between the other two legs for you to stand. This will make it
easier and more comfortable for you to work while focusing and shooting.

3 Extend the legs Open the latches that release the legs and extend the sections. Start

by extending the thickest sections first as they will provide more stable support than the
thinner segments.

4 Be sure the legs are secure If you are on an uneven surface you will have to readjust

the legs until you can get the length just right. When on soft ground or sand, push the tripod
legs all the way down until it is pressed against something solid. To give the tripod some extra
support, you can add some weight on to the center by hanging your camera bag.

5 Check the level on the tripod Some models come with a level built in on the top of

the tripod. Otherwise, you can step back and make sure the center post of the tripod is
perpendicular to the ground.

6 Avoid raising the center post If you set up your tripod and realize you need your

camera to be higher, adjust the legs first. The three legs of the tripod provide much better
stability. Using the center post will make your setup less stable. Only use the center post as a
last resort, or to make minor adjustments when you need an inch or two of additional height.




Camera parts

Camera is made up of many parts, but there are a few in particular that we want to look at
as they are the most important. Here is 10 basics overview of the parts that we’re going to
look at:

10 basic camera parts

1 Body – The body can have a major impact on
comfort when being held and used. Body
impacts the location of buttons, dials and other
parts of the hardware you’ll need to touch and
press to operate your camera.

2 Lenses – The lens is one of the most vital parts of a
camera. It is the eye of the camera. The light enters
through the lens, and this is where the photo process
begins. Lenses can be either fixed permanently to the
body or interchangeable. They can also vary in focal
length, aperture, and other details.

3 Sensor – The sensor is basically the digital film.
Sensor exposed light that comes through the lens
and it records that exposure. The exposure is then
processed and saved to Memory Card.

4 Memory Card – The memory card stores all of the
image information. It comes in different sizes and
speeds. The speed of your memory card is important
because most cameras nowadays are very fast. The
main types of memory cards available are CF and SD
cards, and cameras vary on which type that they

5 Viewfinder – The viewfinder can be found on all DSLRs and
some models of digital compacts. On DSLRs, it will be the main
visual source for image-taking, but many of today’s digital
compacts have replaced the typical viewfinder with an LCD


6 Shutter Release - The shutter release button is the
mechanism that “releases” the shutter and
therefore enables the ability to capture the
image. The length of time the shutter is left open
or “exposed” is determined by the shutter speed.

7 Aperture - The aperture affects the image’s exposure
by changing the diameter of the lens opening, which
controls the amount of light reaching the image
sensor. Some digital compacts will have a fixed
aperture lens, but most of today’s compact cameras
have at least a small aperture range. This range will be
expressed in f/stops.

8 LCD Screen - The LCD screen is found on the back of the body
and can vary in size. On digital compact cameras, the LCD
has typically begun to replace the viewfinder completely. On
DSLRs, the LCD is mainly for viewing photos after shooting, but
some cameras do have a “live mode” as well.

9 Flash - The on-board flash will be available on all
cameras except some professional grade DSLRs. It
can sometimes be useful to provide a bit of extra light
during dim, low light situations.

10 User Controls - The controls on each camera will vary
depending on the model and type. DSLR camera will have
numerous controls for auto and manual shooting along with
custom settings.


How to Attach a Camera to a Tripod

1 Remove the camera base plate from the tripod Most tripods have a plate that

screws onto the base of the camera and locks into place on the tripod. This allows you to
quickly attach and remove the camera when shooting. Remove the plate from the tripod
by using the quick release latch.

2 Attach the base plate to the camera Place the screw of the base plate into the

hole on the bottom of the camera and rotate clockwise until tight. You can do this before
you even go out to take pictures if you want to save yourself some setup time.

3 Place the camera on the tripod Put the camera on top of the tripod so that the

base plate is between the tripod and the bottom of the camera. Some tripods will lock the
camera into place automatically, so listen for the camera to click into place.

4 Secure the release latch If the tripod has a release bar, lock it back into place. Be

absolutely sure the camera is secure on the tripod before you let go of it. Even if it seems
okay, wiggle the camera a bit just make certain it will not fall off.

5 Adjust the camera angle You may need to loosen a knob just below the camera

baseplate to adjust the angle. Once you settle on the desired angle, be sure to tighten the
knob to secure the camera in place.





There is a convention in the video, film and television industries which assigns names and
guidelines to common types of video shots, framing and picture composition. The list below
are the common shot types. Scan on the image to explore more.

VWS (Very Wide

The subject is visible, but the
emphasis is still on placing her
in the environment.

WS (Wide Shot)

The subject takes
up the full frame,
or at least as much as
comfortably possible.
AKA: long shot, full shot.


MS (Mid Shot)
Shows some part
of the subject in more detail
while still giving an impression
of the whole subject.

(Medium Close Up)

Half way between a MS (Mid
Shot) and a CU (Close Up).

CU (Close Up)

A certain feature or
part of the subject takes up the
whole frame.


OSS (Over-the- Shows some
Shoulder Shot)
Looking from behind a person (other) part of
at the subject.
the subject in detail.


A shot of two people,
framed similarly to a mid


High Angle

A high angle

shows the

subject from above, i.e. the

camera is angled down

towards the subject.

Low Angle

This shows the subject
from below, giving them
the impression of being
more powerful or

Dutch Angle

A Dutch angle is a camera
shot in which the camera
angle is deliberately slanted
to one side. This can be used
for dramatic effect


Over the Head

It puts the
viewer in a position looking
down on the action.
In this angle the scene is
shown from almost directly
(or directly) above the



Camera movement is one of the most expressive technique in video production. It alters the
relationship between the subject and the camera frame, shaping the viewer's perspective
of space and time, and controlling the delivery of narrative information.

In the real world, many camera moves use a combination of the techniques simultaneously.
Let’s look at the basic moves that are used in every video and film production. Scan on the
image to explore more.

A dolly is a cart which travels
along tracks. The camera is
mounted on the dolly and
records the shot as it moves.

A pan is a horizontal camera
movement in which the
camera moves left and right
about a central axis.

A tilt is a vertical camera
movement in which the
camera points up or down
from a stationary location.

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