EMS Creative iMedia Cambridge Nationals

1. File Formats
Lesson 8

2. Lesson Goals
 Know file formats used for images, audio and video
 Understand pre-production and final product file formats
 Be able to describe properties and limitations of file formats
#limitation
#property

3. Playing Audio and Video
Describe the different devices that could be used…

4. Video

5. File Formats
Know image, audio and video files
Be able to describe file formats
 Because there are so many different audio and video playback devices and
different ways to distribute files various file formats are required.
 Some people will sacrifice quality for smaller file sizes while others may
required top quality files regardless of file size.
 Audio file formats can vary in:
 Video file formats can vary in:
 File Size
 File Size
 Quality
 Quality
 DRM
 Resolution
 Compression
 Compression
#limitation
#property

6. Audio Files
Know image, audio and video files
Be able to describe file formats
 When comparing the file size of a 3 minute music track saved in different
file formats you can clearly see the effect of audio compression:
WAV
30.4mb
WMA
15.6mb
MP3
4.2MB
MP3
1.4mb
192kbps
64kbps
#limitation
#property

7. Video Files
Know image, audio and video files
Be able to describe file formats
 Different file formats render videos in different ways showing a variation:
 The OGG file tends to look a little bit dark compared to an MP4 but has
the benefit of being a much smaller file size.
#limitation
#property

8. Know image, audio and video files
Be able to describe file formats
File Formats
 When researching file formats remember the following points:
More
Compression
Lower
Quality Files
Smaller File
Sizes
Quicker
Upload
Speed
 Compression may have good and bad consequences:
 Properties – Small file sizes would upload quickly.
 Limitations – File would be a lower quality.
#limitation
#property

9. File Formats
Know image, audio and video files
Be able to describe file formats
 File formats you could research for your work include:
Uncompressed
Compressed
Audio
Video
mp3 wma wmv flv mov
flac
mpg
mp4
swf
ogg aac
aiff
wav
avi

10. Your Task
Know image, audio and video files
Be able to describe file formats
 Create a table showing properties and limitations for audio and video:
 Big or small file size?
 Common file or not?
 Where is it used?
The following website may help:
www.file-extensions.org
 State if the file is compressed or uncompressed.
File
Properties
Limitations
Compression
#limitation
#property

11. Key Words
 File Format
 The standard way that a digital media
file is stored on a computer
 Properties
 Features of the file format such as the
size and quality of the file
 Limitations
 Something that is a restriction on what
you are doing or want to do