[Libav-user] Stream RTP to a specific network interface OR accessing underlying UDP socket

[Mohamed Ismail Mejri]

Hi,

Use your OS routing table. Example in linux:
#  route add -net 224.0.0.0 netmask 240.0.0.0 dev eth1
Best regards.


2018-03-22 17:17 GMT+01:00 LP C <lp.cordier at dynamixyz.com>:

> Hi everybody,
>
> Currently coding a C application that is sending video over the network
> using MULTICAST, I am looking for a way to set on which network interface
> the RTP stream should be sent.
>
> I tried to use 'rtp://237.0.0.1:1234?localaddr=192.168.1.1' but it does
> not work. After digging in the source code of the RTP protocol, it seems
> that this option is not supported right now.
>
> Thus I would like to know if I can access to the underlying socket in
> order to apply IP_MULTICAST_IF using setsockopt (6.3:
> https://www.tldp.org/HOWTO/Multicast-HOWTO-6.html)
>
> Any clues of how to solve this issue programmatically?
>
> Thanks,
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> Libav-user at ffmpeg.org
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>


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