All things related to multicast

[Richard Mavrogeanes <>]

Alan,

I don't think we've spoken yet (and I'll be in traveling for the next week
or so), but I wanted to make you aware that VBrick is a I2 sponsor and I'd
like to help.

To trial MPEG-2 and MPEG-1 multicast, I can provide you with free
registration of StreamPump (http://www.vbrick.com/StreamPump.asp) and some
pretty good MPEG-2 and MPEG-1 royalty-free source files so you can send
honest DVD-quality television over I2.

You can view the television on H/W or S/W decoders which I can also supply
at N/C for I2 members.

The more interesting part is live television, and we can help out there too
with loans of our VBricks, as we've done for several projects already (see
http://www.vbrick.com/pressrelease/TransArt.html).  

Since I won't be able to reply for about a week, you can get the free
versions of the s/w products which only support MPEG-1 and limit the
multicast to only a few minutes.  But send me a note and I'll give you the
registration and you can send continuous television via multicast. And let
me know when or if you want to go live and perhaps I can fix you up with
some VBricks. 

Best Regards,

Rich Mavrogeanes
President/Founder
VBrick Systems, Inc.
203-303-0200





 
 

-----Original Message-----
From: Alan Crosswell
To: 

Sent: 1/17/02 5:37 PM
Subject: yet another MPEG2 demo stream

Hello,

I got tired of watching the Bridge Over the River Kwai trailer, so
I've fired up an MPEG2 demo stream with IPTV server.  The source content
is from a DV recording of a cello master class done last year.  This
MPEG2
is encoded at about 5 Mbps using exclusively linux/GNU tools including
dvgrab to capture the firewire video to a firewire hard disk, mjpegtools
to convert to YUV and wav files and thence to MPEG2 video and MP2 audio
and some sox stuffed in the middle of the pipeline to boost the audio
gain 36dB since I screwed up the gain on the original recording (along
with
having the recorder in 12-bit mode so the sampling is only 32 KHz).

You will need an MPEG2 decoder to view the video (I use DVDexpress
with IPTV viewer).  Hmmm, I wonder if Xine can be turned into an RTP
client?

The video work is amatuerish, lighting is poor, and the editing is
non-existent.  The audio was set up entirely to hear the instruments
so one has to strain to hear the speech unfortunately.  It's basically
just documentation of a live event except for the part where I ran out
of tape in the middle of the professor's making a point:-)

v=0
o=- 61489 6 IN IP4 128.59.31.169
s=David Geber
i=cello master class demo
u=http://www.columbia.edu/acis/networks/advanced/geber

p=+1 212-854-1919
b=AS:5384
t=0 0
a=type:broadcast
a=x-iptv-ipr:(c) 2001 The Trustees of Columbia University in the City of
New York
a=tool:IP/TV Content Manager 3.2.24
a=x-iptv-local:IP/TV Content Manager 3.2.24
a=x-iptv-file:1 name geber+36db.mpg
a=x-iptv-type:scheduled
m=video 61552 RTP/AVP 32
c=IN IP4 224.2.211.27/127
a=framerate:30
a=x-iptv-svr:video iptvhost.cc.columbia.edu file 1 loop
m=audio 21300 RTP/AVP 14
c=IN IP4 224.2.241.169/127
a=x-iptv-svr:audio iptvhost.cc.columbia.edu file 1 loop

My next event (1/29) I'll be trying to record DV live to disk using
dvgrab....

BTW, see if you can tell which participant was next to the DV recorder
and which one was halfway across the country:-)

/a