Send PLI when starting a paused stream

plugins/janus_videoroom.c

@@ -6881,12 +6881,19 @@ static void *janus_videoroom_handler(void *data) {
 				g_snprintf(error_cause, 512, "Already in as a subscriber on this handle");
 				janus_refcount_decrease(&subscriber->ref);
 				goto error;
-			} else if(!strcasecmp(request_text, "start")) {
+			} else if(!strcasecmp(request_text, "start")) {			
 				/* Start/restart receiving the publisher streams */
 				if(subscriber->paused && msg->jsep == NULL) {
+					janus_videoroom_publisher *feed = subscriber->feed;
+
 					/* This is just resuming a paused stream, reset the RTP sequence numbers */
 					subscriber->context.a_seq_reset = TRUE;
 					subscriber->context.v_seq_reset = TRUE;
+
+					if(feed && feed->sdp && strstr(feed->sdp, "m=video")) {
+						/* Send a FIR */
+						janus_videoroom_reqpli(feed, "Subscriber start");
+					}
 				}
 				subscriber->paused = FALSE;
 				event = json_object();