Things you should know about Flash Video

Things you should know about video and Flash

Before you convert video to Flash Video you really need to understand a few things:
  • Flash Video streams into the Flash Player from your web server (that's where you keep your Internet site).
  • Decisions you make before you create the video will directly affect whether the viewer has a positive or a negative experience with the video.
  • Flash video is a streaming format , which means that the server only loads as much of the video as it needs before it starts playing and then keeps loading a steady stream of data while it continues to play the video currently in its memory.
What are the benefits and what is the data rate?
  • Well for a start, it means that if for example you have a large video file your viewers do not have to sit around all day while it completely loads into the memory before it either starts to play or crashes their machine.
  • The data rate is the amount of information that needs to be continually processed in order to play the video., in other words the size of the stream.
  • Size does matter! i.e. the bigger the stream, the more data can be processed e.g. the very small stream that runs through the golf course near where me mam used to live could be said to be equal to a dial up connection, whereas the river Tyne with regard to the same metaphor would be equal to a really fast one.
  • The actual data rate equation is:

    Data rate = (width x height x colour depth x frames per second)/compression

    an example:

    Width: 320
    Height: 240
    Color depth: 24
    Frames per second: 15
    Compression: 60 (The benchmark compression ratio for both ON2 Flix and
    Sorenson Squeeze is 60:1.)
    Data rate = (320 x 240 x 24 x 15)/60
    Data rate = (27,648,000)/60
    Data rate = 460,800
  • When creating video for Internet delivery, these are some commonnly used data rates:

    Dial-up 60 Kbps

    DSL Between 150 and 300 Kbps

    Cable Between 200 and 300 Kbps

    T1 or T3 line 150 to 430 Kbps

  • OK - no more Maths!

    more

Module specific sites

Personal Portfolio Website Module - Graphics Students

Second Year Online Radio Part 1 DE786

Second Year Innovation 3

Third Year Investigating Change part 1 DE687

 


Second Year Tutor Questions

 

Feedback Forms - please fill in
thanks

Trev

 

Feedback Form Investigating Change DE687

 

Feedback Form Innovation 3 DE787

 

Feedback Form Radio Module DE786