add "#EXT-X-PLAYLIST-TYPE:VOD","#EXT-X-MEDIA-SEQUENCE:0",and remove "#EXT-X-DISC…

…ONTINUITY" at the head of total.m3u8

@@ -789,6 +789,8 @@ int SrsHlsMuxer::segment_close(string log_desc)
 				ss << "#EXTM3U" << SRS_CONSTS_LF << "#EXT-X-VERSION:3"
 						<< SRS_CONSTS_LF << "#EXT-X-ALLOW-CACHE:YES"
 						<< SRS_CONSTS_LF;
+				ss << "#EXT-X-PLAYLIST-TYPE:VOD" << SRS_CONSTS_LF;
+				ss << "#EXT-X-MEDIA-SEQUENCE:0" << SRS_CONSTS_LF;
 				srs_verbose("write m3u8 header success.");
 
 			} else {
@@ -810,9 +812,11 @@ int SrsHlsMuxer::segment_close(string log_desc)
 				if(	m3u8_total_endlist_saved ){
 					erase_last_endlist = true;
 				}
-				// #EXT-X-DISCONTINUITY\n
-				ss << "#EXT-X-DISCONTINUITY" << SRS_CONSTS_LF;
-				srs_verbose("write m3u8 segment discontinuity success.");
+				if (currentSeg->sequence_no != 0) {
+					// #EXT-X-DISCONTINUITY\n
+					ss << "#EXT-X-DISCONTINUITY" << SRS_CONSTS_LF;
+					srs_verbose("write m3u8 segment discontinuity success.");
+				}
 			}
 
 			// "#EXTINF:4294967295.208,\n"