One thing that Ross doesn't mention (and Ross, please correct me if I'm wrong) is that with this patch, you should be able to stream MP3 files that are placed on RealServer via RTSP/RTP. If there are any problems with this, let me know so that we can get fixes put into the next version of RealServer.
Thanks Rob On Sun, 27 Jan 2002, Ross Finlayson wrote: > [Last month I told Robert Kaye about an earlier version of these changes, > but there have been several improvements since then, and I wanted now to > announce this to the whole mailing list.] > > I have modified the recent Freeamp 2.1.1 source code release to make use of > the "LIVE.COM Streaming Media" libraries (see <http://live.sourceforge.net/>). > > The major changes in the code were to "io/obs/obsinput.{h,cpp}". These now > use the RTP/RTCP implementation from the LIVE.COM libraries, rather than > the (limited) RTP implementation that was there before. This brings many > benefits: > - There is now full RTCP support. (In particular, Freeamp will now send > back RTCP Reception Reports when playing a RTP session.) > - Freeamp now supports loss-tolerant MP3/RTP streams (as defined in > RFC 3119), as well as traditional MP3/RTP streams as defined in RFC 2250. > - For even greater loss tolerance, Freeamp can now also receive sessions > that use 'layered erasure coding' - i.e., using multiple RTP streams, > encoded at different bit rates (using a technique developed by > Multicast Technologies, Inc.). (For more information about this, see > <http://www.live.com/multikit/winamp-plugin.html#mct-slap>, which > describes how such session can be described using 'rtp://' pseudo-URLs.) > - Freeamp now accepts "rtsp://" URLs (for those MP3/RTP sessions > (unicast or multicast) that are served by RTSP servers. > - As an alternative to using "rtp://" or "rtsp://" URLs to play a MP3/RTP > session, Freeamp can also read a ".sdp" file that describes such sessions > (using the IETF's "Session Description Protocol" - RFC 2327). (At present > this works only if the ".sdp" file name is given on the command line.) > - By using the LIVE.COM libraries, Freeamp now has the potential to > support many additional RTP payload formats - if a decoder is present. > For example, with an appropriate decoding implementation Freeamp could > now support PCM (u-law or a-law), GSM, QCELP, etc. etc. RTP streams. > > In addition to the changes to "io/obs/obsinput.{h,cpp}", there were also > minor changes to a handful of other files - mainly to recognize "rtsp://" > URLs and ".sdp" files as special cases. Plus, of course, I updated > "Makefile.header.in" and "Makefile-plugins.in" to reference the "LIVE.COM > Streaming Media" headers. > > I have left my updated copy of the Freeamp code online as > <http://www.live.com/mct/freeamp+live.tgz>. There is also a patch file: > <http://www.live.com/mct/freeamp+live.patch>, and a pre-built Linux/x86 > binary: <http://www.live.com/mct/binaries/linux-x86/freeamp>. > > To build this from source, you will also need the "LIVE.COM Streaming > Media" code (available from <http://live.sourceforge.net/>), unpacked into > a directory "live" (with "freeamp" and "live" being siblings in the file > hierarchy). > > It would be great if these modifications could be incorporated into the > official Freeamp code base, as they are significant improvement over the > original code. > > Ross Finlayson > LIVE.COM > <http://www.live.com/> > > _______________________________________________ > [EMAIL PROTECTED] > http://www.freeamp.org/mailman/listinfo/freeamp-dev > > _______________________________________________ [EMAIL PROTECTED] http://www.freeamp.org/mailman/listinfo/freeamp-dev
