fix video read frame function to behave like the audio one when waiting for codecs

src/mod/endpoints/mod_sofia/mod_sofia.c

@@ -816,6 +816,7 @@ static switch_status_t sofia_read_video_frame(switch_core_session_t *session, sw
 {
 	private_object_t *tech_pvt = (private_object_t *) switch_core_session_get_private(session);
 	switch_channel_t *channel = switch_core_session_get_channel(session);
+	uint32_t sanity = 1000;
 
 	switch_assert(tech_pvt != NULL);
 
@@ -823,10 +824,13 @@ static switch_status_t sofia_read_video_frame(switch_core_session_t *session, sw
 		return SWITCH_STATUS_FALSE;
 	}
 
-	while (!(tech_pvt->video_read_codec.implementation && switch_rtp_ready(tech_pvt->video_rtp_session))) {
-		if (switch_channel_ready(channel)) {
+	while (!(tech_pvt->video_read_codec.implementation && switch_rtp_ready(tech_pvt->video_rtp_session) && !switch_channel_test_flag(channel, CF_REQ_MEDIA))) {
+		switch_ivr_parse_all_messages(tech_pvt->session);
+		
+		if (--sanity && switch_channel_ready(channel)) {
 			switch_yield(10000);
 		} else {
+			switch_channel_hangup(tech_pvt->channel, SWITCH_CAUSE_RECOVERY_ON_TIMER_EXPIRE);
 			return SWITCH_STATUS_GENERR;
 		}
 	}