[FFmpeg-devel] [PATCH] libavformat/rtsp: fix rtsp multicasts

[Wolfgang Haupt]

ping

On 03.04.20 08:42, Wolfgang Haupt wrote:
> Hey,
>
> is someone up to review this patch?
>
> It's an attempt to fix rtsp streams that use udp multicasts as the 
> underlying
> transmission protocol.
> The idea was taken from live555 as the said stream worked in VLC.
>
> It still applies cleanly on current master.
>
>
> Best Regards,
> Wolfgang
>
> On 18.10.19 18:59, Wolfgang Haupt wrote:
>> If an rtsp server offers a udp multicast
>> address as response of a DESCRIBE command
>> the rtsp client is expected to issue
>> SETUP with "Transport: RTP/AVP/UDP;multicast".
>> Some rtsp servers bail out otherwise.
>> ---
>>   libavformat/rtsp.c | 3 +++
>>   1 file changed, 3 insertions(+)
>>
>> diff --git a/libavformat/rtsp.c b/libavformat/rtsp.c
>> index 859defa592..3f0cbfc98b 100644
>> --- a/libavformat/rtsp.c
>> +++ b/libavformat/rtsp.c
>> @@ -1913,6 +1913,9 @@ redirect:
>>                   && (rt->rtsp_flags & RTSP_FLAG_PREFER_TCP))
>>               lower_transport = RTSP_LOWER_TRANSPORT_TCP;
>>   +        if (ff_is_multicast_address((struct 
>> sockaddr*)&rt->rtsp_streams[rt->nb_rtsp_streams-1]->sdp_ip))
>> +            lower_transport = RTSP_LOWER_TRANSPORT_UDP_MULTICAST;
>> +
>>           err = ff_rtsp_make_setup_request(s, host, port, 
>> lower_transport,
>>                                    rt->server_type == RTSP_SERVER_REAL ?
>>                                        real_challenge : NULL);
>
>