[Libav-user] Unable to receive RTP payload type 96 without an SDP file describing it

[Hadi]

Hi, 

I am trying to open a video stream at a RTP address using the following command:

char *url = "rtp://127.0.0.1:1234";
AVFormatContext *oc = NULL;
avformat_open_input(&oc, url, NULL , NULL);

But I get the following error:

[rtp @ 028568e0] Unable to receive RTP payload type 96 without an SDP file describing it.

Do you know what is the problem, and how we can solve it? Thanks!