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Re: SDP Problem during Multicast

Chen:

First, make sure that your playlist is functioning properly. You should be able to tune in on the playlist:
rtsp://<server address>/<path>/<playlist sdp file>

If you can't access a reflected unicast of the playlist, the relay won't have anything to relay to the multicast address. From the error message, it sounds like the playlist isn't running properly. How are you creating the playlist? You might want to try using web admin (Darwin) or QTSS Publisher (on QTSS) to create and start your playlist.

Once the playlist is working, use the steps to create the multicast relay.

-George

On Jan 24, 2005, at 3:03 AM, Chen Zhigao wrote:

Dear George,

Thanks for the info. I've tried configuring a rely according to the
instructions at the link, but the multicast datagrams sent out. And the log
file still says "Error:Movie file does not match SDP." Below are what I have
done. Am I missing something?

Step 1:
Point my browser to http://127.0.0.1:1220. At the "Relay Settings", I added
a new relay with the following settings.
Source IP: 127.0.0.1, Mount Points: /usr/local/movies/thinkpad_mcast.sdp,
Request Incoming stream
Destination IP: 224.10.11.12, Relay via UDP base port: 9000, Multicast
TTL: 4

Step 2: skipped.

Step 3:
run "PlaylistBroadcast thinkpad_mcast" at server computer. The generated SDP
file says "c=IN IP4 22.10.11.12/4", "m=video 9000 RTP/AVP 96" and "m=audio
9002 RTP/AVP 97". It seems I don't need to modify the file.
I am a bit confused here. How should I deal with the file? Shall I transfer
it to my client computers. BTW, I am using the gmp4player of the MPEGP4IP.
The relay I created is not shown at the "Relay Status" of the QSS admin
webpage.

Any pointer is highly appreciated.


Best regards,
Zhigao


-----Original Message-----
From: George Cook [mailto:email@hidden]
Sent: Friday, January 21, 2005 7:15 AM
To: Zhigao Chen
Cc: email@hidden
Subject: Re: SDP Problem during Multicast

You can multicast a playlist by relaying the playlist to a multicast
address. For more information on setting up a multicast relay see:
http://soundscreen.com/streaming/relay.html#multicast

In step 1 on the web page above, the source of your relay would be the
loopback address (127.0.0.1) and the mount point would be the sdp file
generated by Playlist Broadcaster. Skip step 2. In step 3 use the sdp file
generated by Playlist Broadcaster as the starting point for your multicast
sdp file.

-George

On Jan 18, 2005, at 3:50 AM, Zhigao Chen wrote:

Further to my previous email. Below is the SDP file generated by
PlaylistBroadcaster.

--------------------------------------------
v=0
o=QTSS_Play_List 4034490386 3077131889 IN IP4 10.81.114.102
s=thinkpad_mcast.sdp
c=IN IP4 224.10.11.12/15
t=0 0
a=x-broadcastcontrol:TIME
a=isma-compliance:1,1.0,1
a=mpeg4-iod:
"data:application/mpeg4-iod;base64,AoCAgwMAT///DwH/
A4CAggAAB0DcZGF0YTphcHBsaWNhdGlvbi9tcGVnNC1vZC1hdTtiYXNlNjQsQVlDQWdRUU J
nSUNBS1FLZkE0Q0FnQ0lBQlFBRWdJQ0FGRUFWQUFDOEFBRUcrQUFCQU5VRmdJQ0FBaEdRQ m
9DQWdBRUFBWUNBZ0ZFRkh3T0FnSUJLQUFFQUJJQ0FnRHdnRVFBUTdRQUNvY2dBQVBzN0JZ Q
0FnQ29BQUFFQUFBQUJJQURFalloZHJRVUVEeFJqQUFBQnNrWkdiWEJsWnpBdU5DNDJZalE y
TkRZQWZ3QUdnSUNBQVFBPQSAgIANAQUAAIkAAAAAAAAAAAaAgIAJAQAAAAAAAAAAA4CAgH I
ACEBGZGF0YTphcHBsaWNhdGlvbi9tcGVnNC1iaWZzLWF1O2Jhc2U2NCx3QkFTZ1RBcUJXM G
1FRUg4QUFBQi9BQUFCRUtDS0NuNASAgIAVAg0AABgAAAAAAAAAAAWAgIADAABgBoCAgAkB A
AAAAAAAAAA="
m=video 5004 RTP/AVP 96
a=control:trackID=1
a=rtpmap:96 MP4V-ES/90000
a=mpeg4-esid:1
a=fmtp:96 profile-level-id=1;
config=000001000000012000c48d885dad05040f1463000001b246466d706567302e3 4
2e366234363436007f00;
m=audio 5006 RTP/AVP 97
a=control:trackID=2
a=rtpmap:97 mpeg4-generic/48000/2
a=mpeg4-esid:5
a=fmtp:97 streamtype=5; profile-level-id=15; mode=AAC-hbr; config=1190;
SizeLength=13; IndexLength=3; IndexDeltaLength=3; Profile=1;
---------------------------------------------


On Tue, 2005-01-18 at 16:43, Zhigao Chen wrote: 
Dear folks,

I was trying to use PlaylistBroadcast to multicast two MPEG4 video.
However, there are no multicast IP datagrams sent out from my
DarwinStreamingServer. The log file says "Error:Movie file does not
match SDP". The configuration files I used are as below.

I would appreciate it if you could give me some pointers.

Zhigao


===========================================

My playlist file "thinkpad_playlist".
-----------------------------------
*PLAY-LIST*
gullivers_travels1939_64kb.mp4
Towers.mp4
------------------------------------


My multicast description file "thinkpad_mcast"
-------------------------------------------
playlist_file thinkpad_playlist
play_mode sequential_looped
sdp_reference_movie gullivers_travels1939_64kb.mp4
destination_ip_address 224.10.11.12
destination_base_port 5004
multicast_ttl 15
logging enabled
--------------------------------------------


logfile generated.
--------------------------------------------
#Log File Created On: 01/18/2005 16:26:26
#Software: PlaylistBroadcaster
#Version: 5.0.1.1
#Date: 2005-01-18 16:26:26
#Remark: All date values are in local time.
#Fields: date time filepath title copyright comment author artist
album
duration result
#Remark: 2005-01-18 16:26:26 Towers.mp4 Error:Movie file does not
match
SDP.
2005-01-18 16:26:26 'gullivers_travels1939_64kb.mp4' '-' '-' '-' '-'
'-'
'-' 0
16
#Remark: 2005-01-18 16:26:26 gullivers_travels1939_64kb.mp4
Error:Movie
file does not match SDP.
2005-01-18 16:26:26 'Towers.mp4' '-' '-' '-' '-' '-' '-' 0  16
---------------------------------------------

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References: 
 >RE: SDP Problem during Multicast (From: "Chen Zhigao" <email@hidden>)



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