lo3 - lesson 8 - file formats
DESCRIPTION
EMS Creative iMedia Cambridge NationalsTRANSCRIPT
File FormatsLesson 8
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
Playing Audio and VideoDescribe the different devices that could be used…
Audi
oVi
deo
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: File Size Quality DRM Compression
#limitation#property
Know image, audio and video filesBe able to describe file formats
Video file formats can vary in: File Size Quality Resolution Compression
Audio Files
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:
#limitation#property
Know image, audio and video filesBe able to describe file formats
WAV 30.4mb
WMA 15.6mb
MP3 4.2MB
MP31.4mb
192kbps
64kbps
Video Files
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
Know image, audio and video filesBe able to describe file formats
OGG MP4
File Formats
When researching file formats remember the following points:
Compression may have good and bad consequences: Properties – Small file sizes would upload quickly. Limitations – File would be a lower quality.
#limitation#property
Know image, audio and video filesBe able to describe file formats
More Compression
Lower Quality Files
Smaller File Sizes
Quicker Upload Speed
File Formats
File formats you could research for your work include:
Know image, audio and video filesBe able to describe file formats
Audio VideoCompressed
Uncompressed
avi
wmv mov
mpg mp4swf
flv
aiff wav
mp3 wma
aacoggflac
Your Task
Create a table showing properties and limitations for audio and video: Big or small file size? Common file or not? Where is it used?
State if the file is compressed or uncompressed.
Know image, audio and video filesBe able to describe file formats
File Properties Limitations Compression
#limitation#property
The following website may help:www.file-extensions.org
Key Words
File Format
Properties
Limitations
The standard way that a digital media file is stored on a computer
Features of the file format such as the size and quality of the file
Something that is a restriction on what you are doing or want to do