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Real Audio/Video FAQ'sl

 

  1. Where can I learn more about Real Audio and Video?

 2. What software do I use to create Real Audio and Video files?

 3.
How do I get around not having "bandwidth negotiation"?

 4.
What are some of the special features of the RealServer?

 5.
Is there a difference between streaming using  the PNM-protocol and the HTTP-protocol?

 6.
You do not have the RealServer software running on your  servers. Will we be able to stream RealMedia files?

 7.
Using Real Audio/Video


1.  Where can I learn more about Real Audio and Video? - Top
       

You can find out more at Real.com's Developer Zone
 
      


2.  What software do I use to create Real Audio and Video files? - Top
       

Real Producer Basic is available free at
http://www.realnetworks.com/developers/index.html 
       


3.  How do I get around not having "bandwidth negotiation" ? - Top
       

While encoding, if you set the target audience to 28 K modem,  you will be able to reach the largest audience possible. If you want your higher bandwidth connection visitors to receive better quality recordings, you can always create a second link  to a RealMedia file that is encoded with a target audience of a higher bandwidth connection 
      


4.  What are some of the special features of the RealServer? - Top
       

 With the Real Server, you are able to take advantage of "bandwidth negotiation". This feature takes into account the bandwidth of the surfer's Internet connection when clicking on  the hyperlink that requests the RealMedia file. Depending on the connection, the RealServer will provide a different version of the RealMedia file that best suits the visitor's bandwidth  connection.

You also need the RealServer to broadcast live on the Internet.
 
      


5.  Is there a difference between streaming using the PNM -protocol and the HTTP-protocol? - Top
       

If you visit http://www.real.com/, you might come across a  term called "pseudo-streaming". According to audiohost.com: "Pseudo-streaming" is a discriminating name for HTTP-stream.  It was invented by the RealAudio promotion to suggest that you need to use the RealAudio server if you want to get "real"  streaming. Here's a free translation: "Streaming RealAudio files without using RealAudio server software". That's all there is to  it! The RealAudio server actually has some special features that cannot be achieved (in RealAudio) without it. Regarding "streaming" we cannot find a difference between the two  protocols.

 
      


6.  You do not have the RealServer software running on your servers. Will we be able to stream RealMedia files? - Top
       

 Yes, you will be able to stream RealMedia files. You will need to create a .ram file that calls your real audio/video file. The  .ram file is a text file with an absolute URL. This URL will need to be:

http://full.domain.name/directory/filename.rm
 
       


7.  Using Real Audio/Video - Top
       

Real Audio is a real time audio transmission/player system. A  digital audio stream is transmitted from the server over the Internet to the destination and played immediately, rather than being stored to disk first and then played.

Each audio clip requires two files: a metafile with extension .ram, and the digital audio clip itself, with extension .ra.

The .ram file holds one or more lines of ASCII text, each of  which references the .ra file to be played when the .ram file is accessed by the browser.

Entries in .ram files have the form:

pnm://yourdomain.com/yourdomain/name-of-clip.ra

Place your .ram and .ra files in the realaudio subdirectory under your web directory. Remember that .ram files must be uploaded in ASCII mode while .ra files must be uploaded in  BINARY mode. You may then access these files via a web browser at:

http://www.yourdomain.com/realaudio/file.ram
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