ffserver: Send a Content-Base header in the reply to RTSP DESCRIBE requests

This is needed for QuickTime Player to be able to connect properly.


backport r23325 by mstorsjo


Originally committed as revision 23383 to svn://svn.ffmpeg.org/ffmpeg/branches/0.6

ffserver.c

@@ -3012,6 +3012,7 @@ static void rtsp_cmd_describe(HTTPContext *c, const char *url)
         return;
     }
     rtsp_reply_header(c, RTSP_STATUS_OK);
+    url_fprintf(c->pb, "Content-Base: %s/\r\n", url);
     url_fprintf(c->pb, "Content-Type: application/sdp\r\n");
     url_fprintf(c->pb, "Content-Length: %d\r\n", content_length);
     url_fprintf(c->pb, "\r\n");