This lesson teaches how to check digital media file properties and test files against requirements. Students will learn to check a file's type, size, length and other properties by viewing its properties details. They will also create a testing table to check that their audio, image and video files meet requirements for file type, size, length, pixels and other specs. Screenshots of file properties will be produced to identify key features and show the files meet requirements.

1. Digital Media
Lesson 8

2. Lesson Goals
 Know how to check the properties of a
file
 Understand the need to test against requirements
 Be able
to test audio, image and video files

3. Be able to test digital media files
Know how to check properties
Properties

Each file has properties that
we are able to check if we
right click on the file.

This will let us verify that we
have exported each file as the
right type to meet the file
type requirements stated as:
Audio
Image
Video

.mp3
.jpg
.mpg
All of this information is under
the general tab in properties.
#properties
#testing

4. Be able to test digital media files
Know how to check properties
Properties

If we look at the details tab in
properties we can also check
if each file has been made to
meet the requirements:
Audio
6 seconds
Image
600x160 pixels
Video
12 seconds
320x240 pixels
#properties
#testing

5. Be able to test digital media files
Know how to check properties
Testing

Testing is carried out towards the
end of a project usually to ensure
that the product produced meets
the client requirements.

With this task we were given very
particular instructions on how to
edit each file:
Audio
.mp3
6 seconds
Image
.jpg
600x160
Video
.mpg
320x240
12 seconds
#properties
#testing

6. Be able to test digital media files
Know how to check properties
What can we test?
Think of each digital media file…
#properties
#testing

7. Be able to test digital media files
Know how to check properties
Testing

For this project we are able to test some very specific areas of
each digital media file we produced:

If you have carried out your edits correctly we should find very
few errors in your digital media files.

If you do find errors in any of your files it is expected that you will
improve them and show evidence of your improvements.
#properties
#testing

8. Be able to test digital media files
Know how to check properties
Your Task

Create a testing table checking each of your files against the key
client requirements and identifying any improvements:
Testing

Expected Outcome
Actual Outcome
Improvements
Produce screenshots showing the properties of your audio, image
and video files and identify the key features of each:
#properties
#testing

9. Be able to test digital media files
Know how to check properties
Keywords

Properties

The information relating to a particular file
e.g. size, length, type.

Testing

Checking a product against the requirements
to make sure it is suitable.
#properties
#testing