# startMediaCasterStream rtsp connection
**URL:** https://community.wowza.com/t/startmediacasterstream-rtsp-connection/37274
**Category:** Wowza Streaming Engine
**Created:** [November 17, 2014, 1:23am UTC](https://community.wowza.com/t/startmediacasterstream-rtsp-connection/37274 "2014-11-17T01:23:35Z")
**Posts on this page:** 3
**Page:** 1
### Author:  [@Bora\_Erbas](https://community.wowza.com/u/Bora_Erbas)
#### Post date: [November 17, 2014, 1:23am UTC](https://community.wowza.com/t/startmediacasterstream-rtsp-connection/37274/1 "2014-11-17T01:23:35Z")
Hi All,
I need to find out the local port number that Wowza got when connecting to an RTSP camera.
We use startMediaCasterStream call to connect to remote cameras.
Is there a callback to intercept when Wowza does the actual connection to the camera so we can find out the local port before the RTSP message exchange begins?
Regards,
Bora.
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### Author:  [@Paul\_Shields](https://community.wowza.com/u/Paul_Shields)
#### Post date: [November 17, 2014, 9:29pm UTC](https://community.wowza.com/t/startmediacasterstream-rtsp-connection/37274/2 "2014-11-17T21:29:05Z")
RTSP port is 554 for TCP/UDP. Are you pulling the stream from the RTSP source via a stream file? The source will advertise itself on that port if acting as as server and you just need to set up a stream file in Wowza up pull the stream in. [This article](https://www.wowza.com/docs/how-to-re-stream-video-from-an-ip-camera-rtsp-rtp-re-streaming%28RTSP-RTP-re-streaming%29) describes that method.
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### Author:  [@Bora\_Erbas](https://community.wowza.com/u/Bora_Erbas)
#### Post date: [November 17, 2014, 9:32pm UTC](https://community.wowza.com/t/startmediacasterstream-rtsp-connection/37274/3 "2014-11-17T21:32:07Z")
Yes we use stream files to publish streams.
But what I need to find out is the _outgoing_ TCP port of Wowza when it connects to the camera.
This outgoing port should be different for each stream (i.e. each TCP connection).
Regards.