LO3 - Lesson 8 - File Formats

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  • LO3 - Lesson 8 - File Formats

    1. 1. File Formats Lesson 8
    2. 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. 3. Playing Audio and Video Describe the different devices that could be used…
    4. 4. Video
    5. 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. 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. 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. 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. 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. 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. 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

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