All things related to multicast

[Richard Mavrogeanes <>]

Hi Alan,

Glad to hear you got things resloved. I believe you could just as well
change the SAP address conflicts. You can set the addresses for both the RTP
streams and System Streams as well as the addresses used for the
advertisements of each.

Please note that until recently, we did not support RFC SAP timing, so your
SAP transmission time is a fixed increment. 

Depending on what you want to accomplish it can be very useful to capture
the standard mpeg-1 system streams produced by the vbrick directly to disk
while you also stream to viewers equipped with cisco's viewer via RTP.  It's
a bit of a challange to collect separate audio/video streams and save them
to disk such that standard editors can use them.  Some users have found it
convenient to capture the live video in this way and later edit and
redistribute it.

Just a thought.

Rich
 

-----Original Message-----
From: Alan Crosswell
To: Richard Mavrogeanes
Cc: 'Alan Crosswell'; Marshall Eubanks; Philip Pishioneri;

Sent: 3/21/02 6:34 PM
Subject: RE: request for signalreport

As Emily Litella (Gilda Radner) used to say, "Never Mind."

I was seeing apparently alternating SAP announcements for the vbrick
proprietary and standards-based streams overlapping each other.  Once
I set my vbrick for 1500 kbps mpeg encoding, turned off the proprietary
system stream (cip:19:1) and turned on rtp it seems to play just fine
in iptv viewer.  I had earlier sync problems between audio and video
that
caused the iptv viewer to crap out in a bad way which was apparently a 
result of my using an unsual mpeg-1 encoding rate (of 2 Mbps).

Anyway, problem solved and I now have this robotics thing running MPEG-1
at 1.5 Mbps. MPEG-2 at 5 Mbps, and Real surestream at 56K and 300Kbps:-)
Plenty of time too as kick off is 10am tomorrow!

Attached, below is an example of Northwestern's SAPs flip-flopping.
Marshall -- tell Joel to type cip:19:1 to turn off sending the
proprietary format stream and associated SAP:-)

Thanks all.

/a

nn2k-gw>sho ip sdr "CSPAN via Nwstrn U."
SAP Cache - 120 entries
Session Name: CSPAN via Nwstrn U.
  Description: VBrick streaming video
  Group: 233.0.103.30, ttl: 63, Contiguous allocation: 1
  Uptime: 2w0d, Last Heard: 00:00:05
  Announcement source: 129.105.153.48, destination: 224.2.127.254
  Created by: - 0050c200cbaa 1 IN IP4 129.105.153.48
  Phone number: 
  Email: 
  URL: 
  Media: video 4444 udp 32
  Media: audio 4444 udp 14
nn2k-gw>sho ip sdr "CSPAN via Nwstrn U."
SAP Cache - 120 entries
Session Name: CSPAN via Nwstrn U.
  Description: VBrick Streaming Video
  Group: 0.0.0.0, ttl: 0, Contiguous allocation: 1
  Uptime: 2w0d, Last Heard: 00:00:02
  Announcement source: 129.105.153.48, destination: 224.2.127.254
  Created by: - 00801940020317254998 1 IN IP4 129.105.153.48
  Phone number: My Administrator <My Phone >
  Email: My Administrator <My E-mail >
  URL: 
  Media: video 4446/1 RTP/AVP 32
    Media group: 233.0.103.30, ttl: 63
    Attribute: x-iptv-svr:video 129.105.153.48 file 1 loop
  Media: audio 4448/1 RTP/AVP 14
    Media group: 233.0.103.30, ttl: 63
    Attribute: x-iptv-svr:audio 129.105.153.48 file 1 loop
nn2k-gw>

/a