*ISO mPeG‐4 version 1
*Windows media Video 9 screen
*Windows media screen version 7
Windows media audio (Wma) codecs
ÆWindows Media also has a variety of audio codecs optimized for different uses.
‐These include:
*Windows media audio 9
*ACELP.net
*Windows media audio 9 Voice
*Windows media audio 9 Professional
*Windows media audio 9 lossless
Exporting to realmedia format
ÆRealMedia is the oldest real‐time streaming web format
‐Unlike Windows Media, most RealMedia tools specify the total data rate from which audio data rate is subtracted to leave video data rate. However, some tools don’t use this method.
‐You can use realmedia for streaming delivery
ÆUnlike Windows Media, it can mix and match codecs in different streams. All streams must share the same frame size, which can limit scalability.
‐You can use realmedia for progressive download
ÆWhile RealMedia is mainly considered a streaming format, it has supported the excellent .rmvb 2‐ pass VBR progressive mode for several years. These files actually use a different extension than the standard .rm files, indicating that the files won’t work when placed on a streaming server.
‐You can using realmedia for disc‐based delivery
