Is it possible to setup 2 multiacst streams with same rtp/rtcp ports in gst-rtsp-server?

[Marc Leeman]

if you are using TCP as transport, this should already be the case AFAIK.

On Thu, 16 Dec 2021 at 11:15, Bruce Liang via gstreamer-devel <
gstreamer-devel at lists.freedesktop.org> wrote:

> Hi,
>
>
>
>         I'm using gst-rtsp-server to test multicast rtp stream with
> indicated address and port.
>
>
>
>         Threre are 2 streams in gst-rtsp-server and I'm using 2 rtcp
> clients to setup and play stream 0 and then stream 1 with same transport
> header.
>
>
>
>         The transport header is:
>
>         RTP/AVP;multicast;destination=224.3.0.2;ttl=64;port=5702-5703
>
>
>
>         The SETUP request to setup stream 0 is success but the SETUP
> request to stream1 is failed and the following response is returned:
>
>         RTSP/1.0 461 Unsupported transport
>
>
>
>         And I got the following debug log:
>
>         0:00:05.501051300   974 0x7fffefbb7d80 DEBUG
> rtspstream
> rtsp-stream.c:1548:alloc_ports_one_family:<GstRTSPStream at 0x7f5f4804ade0>
> rtp bind() failed, will try again
>
>         0:00:05.501133200   974 0x7fffefbb7d80 ERROR
> rtspstream
> rtsp-stream.c:1682:alloc_ports_one_family:<GstRTSPStream at 0x7f5f4804ade0>
> failed to allocate UDP ports with requested transport settings
>
>
>
>         In alloc_ports_one_family(..), the rtp and rtcp socket are binded
> to multicast address and port by g_socket_bind(..) with [allow_reuse] =
> FALSE.
>
>
>
>         I'm wondering why it have to bind socket to multicast address and
> port which is used for sending.
>
>
>
> Best regards,
>
> Bruce
>
>
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-- 
g. Marc
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