HTTP Streaming can be several things. Here is an attempt to outline
the different HTTP streaming protocols:
MP3/AAC/aacPlus HTTP Streaming:
This is usually the SHOUTcast or Icecast ICY protocol, which uses
ADTS packetization over TCP. This is NOT compatible with ANY RTSP
streaming. This uses an ICY based Streaming Server such as SHOUTcast
or Icecast2. This is the part that is MOST confusing:
QuickTime/Darwin Streaming Server includes an ICY server module for
MP3 streaming only. It is based the old deprecated Icecast1 protocol,
and is no longer supported or recommended. Icecast2 is the preferred
server here.
HTTP Tunnelling:
This is standards-based RTSP/RTP TCP Interleave (RFC-2326/3550)
inside HTTP encapsulation to look like HTTP web server traffic to
penetrate difficult firewalls. This method will usually get through
content filtered firewalls where HTTP/ICY is filtered. Being
standards-based, many different types of audio/video codecs may be
used for these streams. Most streaming using this protocol is MPEG-4
based today. This uses an RTSP/RTP Streaming Server, such as
QuickTime/Darwin Streaming Server.
HTTP Progressive Download Streaming:
This is nothing more than a file download from a Web Server, and the
file plays as it is downloading, hopefully, if there is sufficient
bandwidth. The file will also land in the user temporary folder,
offering no security to content. This method uses a Web Server.
Hopefully, this clears up some confusion on all of this.
-greg.
ORBAN.
At 17:34 2007-06-30, Rusty Hodge wrote:
I suspect it probably doesn't handle HTTP streaming either as
that's essentially RTSP over port 80.
HTTP "streaming" is very different than RTSP. Totally different
formats! Not just a port difference!
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__________________________________________________________________________
Greg J. Ogonowski
VP Product Development
ORBAN / CRL, Inc.
Diamond Bar, CA 91765 USA
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http://www.orban.com
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