[vlc] Re: Play Multicast Stream without send IGMP join/leave

[Pranjal Dutta (prdutta)]

Hi,
        Thanks for your reply.The region is that I am using VLC as a Plugin 
to one Multicast Simulator that sends IGMPv2/v3 join /leave.So VLC should 
only open a socket to listen to a Multicast Address/Port (with sending a 
IGMPv2/v3 join.leave)and receive the Network Stream and Play.When I start 
VLC to receive a Multicast stream by default it sends out IGMPv2/v3 message 
and then plays the Video. Once I close the video it sends out the IGMPv2/v3 
leave message. I wanted to know if there is any option(without changing the 
source code) to receive a listen to a Multicast Address without sending a 
IGMP join/leave. Otherwise I will change the source code.

Regards,
Pranjal


At 09:45 AM 9/14/2004 -0400, you wrote:

>----- Original Message -----
>From: "Pranjal Dutta (prdutta)" <prdutta at cisco.com>
>To: <streaming at videolan.org>
>Cc: <vlc at videolan.org>
>Sent: Tuesday, September 14, 2004 4:48 AM
>Subject: [vlc] Play Multicast Stream without send IGMP join/leave
>
>
> > Hi All,
> >                I am doing some experiment on Live/Multicast streaming with
> > VLC. When VLC is started to receive a Multicast Stream lets say coming at
> > 224.10.10.1 and port 2001 , VLC immediately sends out IGMPv2/v3 join
> > message and plays the stream as well. Now I have another agent in my
> > Network that sends out IGMPv2/v3 message and I just want VLC to receive
>and
> > play the Multicast Stream only(The way it received and play a UDP unicast
> > stream). I don't want VLC to send IGMPv2/v3 message.Is there any possible
> > way to do it? Any pointers will be of great help.
>
>What you're asking is a bit unclear.  You want VLC to play multicast but not
>use IGMP to join the multicast group?  This would work on a network with
>cheap unmanaged switches, but the real question is why?  So what if you have
>another agent (not sure what agent is supposed to mean) that uses IGMP.  The
>standard is defined so that everyone can use IGMP as long as it done
>appropriately.  So what is wrong with your agent that it doesn't work right?
>That's what I would focus on.  Nevertheless, you could just get the VLC
>source and compile it to remove the IGMP group join and leaves.  I haven't
>looked at that part of the code but it is probably some setsockopt
>statements.
>
>However, if you have a network with managed switches that are configured for
>IGMP snooping and/or queriers then what you want to do will not work.
>That's because if you don't send out the IGMP requests, then you don't get
>the stream.  That's how it's supposed to work.
>
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