Thank you for the answer! I’ve noticed this behaviour in the newest VLC version 
and they told me that I should inform Live555. The RTSP server is integrated in 
an AoIP (Audio over IP) device and it is not available at the moment. I’m able 
to modify the RTSP/SDP part. If I’m using “a=sendonly” instead of “a=recvonly” 
it works without any issue, nothingelse has changed only "a=sendonly”. I’m 
using in both case a multicast address.



Hans



Von: Ross Finlayson<mailto:finlay...@live555.com>
Gesendet: Mittwoch, 19. April 2017 17:36
An: LIVE555 Streaming Media - development & 
use<mailto:live-de...@ns.live555.com>
Betreff: Re: [Live-devel] RTSP client doesn't receive stream if SDP attribute 
is "recvonly"



> If RTSP servers are using the correct SDP option "recvonly" as defined in
> ·         RTSP version 1.0: RFC2326 
> (https://www.rfc-editor.org/rfc/rfc2326.txt, „10 Method Definitions”)
> ·         RTSP version 2.0: RFC7826 
> (​https://www.rfc-editor.org/rfc/rfc7826.txt, "D.1.5. Directionality of Media 
> Stream")
> the RTSP client will not receive the corresponding stream.

Our RTSP client code (which, by the way, supports only RTSP version 1.0; not 
RTSP version 2.0) completely ignores the “a=recvonly” attribute.  (In fact, 
this attribute is not even defined fully in the RTSP 1.0 specification; it just 
happens to be used in a couple of examples.)

Therefore, there must be some other reason why we are not receiving your 
RTSP/RTP/RTCP stream.  Do you have a publicly-accessible “rtsp://“ URL that we 
can test?


Ross Finlayson
Live Networks, Inc.
http://www.live555.com/


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