FS-7513: don't write 0 data, openh264 might return 0

src/switch_core_media.c

@@ -10392,7 +10392,9 @@ SWITCH_DECLARE(switch_status_t) switch_core_session_write_video_frame(switch_cor
 				switch_core_session_video_reinit(session);
 				frame->flags &= ~SFF_PICTURE_RESET;
 			}
-			
+
+			if (frame->datalen == 0) continue;
+
 			switch_set_flag(frame, SFF_RAW_RTP_PARSE_FRAME);
 			status = switch_core_session_write_encoded_video_frame(session, frame, flags, stream_id);
 		}