Audio/Video Streaming



Overview:

RealAudio and Internet Wave are two options for streaming audio files within a Web page. Real Video is the best option for streaming video files.

Examples:

RealAudio Example - Stereo Music

 

Iwave Example - Mono Speech

 

Real Audio - Example of Synchronized sound and Web pages

 

Real Video Example

 

National Public Radio


How to work with streamed audio/video...

  1. Plug-in / Helper Application Software

    To try out the example links given above, or to access any streamed audio or video site, you must install a "helper application" or "browser plugin" which will allow your desktop computer to "play" the streamed audio or video file. Below are links to sites where you can download free streamed audio/video player software:

    Real Player
    Internet Wave


  2. Create and Edit Audio and Video Files

    Sound editing/recording software programs include:

    GoldWave
    CoolEdit
    SoundEdit 16 plus Deck II (Macintosh)
    Sound Forge (Windows)

    Video editing software program:

    Adobe Premiere

    Instructions on creating and editing audio files

    Sound Files (Using SoundForge for Windows and SoundEdit 16v.2 for the Macintosh)
    Recording and Preparing Audio Content (IWave)

  3. Encode the Files

    Once your sound or video file is recorded, you need to "Encode" the digital audio file so that it can be played by the sound/video streaming helper application or plugin software. You may want to encode the same audio/video file in several different formats. Some encoding software is free:

  4. Real Audio Encoder
    Real Video Encoder
    Internet Wave Encoder

    Here is a brief description of the procedures for encoding files for Iwave, RealAudio and RealVideo.

  5. Put Files on the Server

    To serve your streamed audio file (to make it available to others on the Internet), you must store it on a server. Streamed video and some streamed audio files require that a special server software be installed and running (e.g. Real Audio). Other streamed audio files can be served from a standard web server, but will require some web server configuration settings be modified (e.g. Internet Wave). Refer to the appropriate (Real Audio or Internet Wave) web site for additional information on installing and configuring the server software. After configuring the server software, you will need to copy your encoded files from your local desktop computer to the server - using a program such as ftp (file transfer protocol).

  6. Test the Files

    Once you have your server configured and your encoded audio/video files stored on the server, you are ready to test your files to see if they play. Use the audio/video streaming helper application or plugin software that is appropriate. If you are using a plugin software program to play the streamed files, you will not need to configure your web browser software, simply install the plugin and play the sound. If you are using a helper application to play the streamed files, after installing the helper application on your computer, you will need to configure your web browser to user the helper application.



Revised 6/6/97

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