[FFmpeg-devel] [PATCH] RTSP multicast fix

[Thijs Vermeir]

Hi,

On 7/12/07, Luca Barbato <lu_zero at gentoo.org> wrote:
> Thijs Vermeir wrote:
>
> >> why is this needed?
> >
> > in the rfc that describes this SDP protocol [1] RTP/AVP/UDP is only
> > for unicast streams, RTP/AVP must be used for multicast streams. (also
> > in the examples in the RFC for RTSP [2] page 66)
>
> No
>
>    The syntax for the transport specifier is
>
>        transport/profile/lower-transport.
>
>    The default value for the "lower-transport" parameters is specific to
>    the profile. For RTP/AVP, the default is UDP.

Because a multicast can only be send over UDP this can be dropped
(like in the standard)

>
>
> > Now, the implementation is just wrong... it asks the stream from the
>
> Not really, it correctly falls back directly to unicast and the server
> should give an unicast rtsp session when requested...
>

Choosing for multicast is a client option. So the implementation is
wrong that it can't connect to a rtsp MULTICAST encoder. like in (
./ffplay rtsp://10.3.0.70?multicast )

> lu

Gr,
Thijs