All posts by Mr Stratton

Computing teacher and a PT at Coltness High School.

Container files & CODECS

Codecs are instructions for “Compressing – Decompressing” or “Coding – Decoding” streams of data. These instructions can be either software or hardware based. Hardware based encoders/decoders are very fast and do not put strain on the CPU. This allows relatively low computing power devices like DVD players and the Raspberry Pi to display full screen videos.

You need to have the right codec installed to view the compressed files, although some programs have codecs built into them.

To find the codec of a file, it is necessary to look at the header information on the file, there are utilities to do this for you.

[kml_flashembed movie="http://www.youtube.com/v/_nPsBwMivCk" width="425" height="344" allowfullscreen="true" fvars="fs=1" /]

Container files contain several compressed files, the header is used to decompress the files. RIFF and MP4 are examples of container files.

Authoring Package Vs Presentation Software

FROM SCHOLAR

Follow 3 of the stages of the Software development process to complete this task, omitting ‘Analysis’, ‘Documentation’ and ‘Evaluation’.

You should create two versions of your completed design – one using Dreamweaver, the other using PowerPoint.

You do not have long to complete this task, so keep your designs SIMPLE.

The purpose of this task is not to produce fabulous, complete multimedia applications, but to use both a Presentation and Authoring package to complete the same task. This should allow you to compare both programs.

Your brief:

Create a multimedia application to introduce people to you and two of your interests.

You must complete this task using only 3 screens or pages.

Each screen must not contain any more than 2 images (although you can use a background) – Use the same images on both.

Your system should be easy to navigate, so design the navigation method carefully.

Step 1 Design

  • Design the navigation structure, showing how all 3 pages link together. Design the rough layout for each page, mentioning the content and navigation features.

Step 2 Implementation

  • Create your application using Powerpoint.

Step 3 Testing

  • Make sure that all the links and navigation features work. Make sure that each page is displayed/animated as you wish.

Step 4

  • Repeat Steps 2 & 3, this time using Dreamweaver.

Development process for multimedia applications

This is the topic that we will be looking at this week.

  • Description of the software development process as it applies to the development of multimedia applications
  • Description of methodologies used in the creation or definition of a multimedia application, including:
    • WYSIWYG editors and text editors to create web pages
    • authoring software to create multimedia applications
    • presentation software to create presentations
  • Description of the methodologies and requirements for the display of a multimedia application, including:
    • streaming of multimedia data
    • embedded files
  • Explanation and exemplification of the terms
    • ‘codec’
    • ‘container’ file