📦 NEW: 设置丢帧标志

添加28181 bye接口调用时将流关闭

README.md

@@ -22,7 +22,7 @@ gb28181:
   prefetchrecord: false
   udpcachesize:   0
   sipnetwork:     udp
-  sipip:          
+  sipip:          ""
   sipport:        5060
   serial:         "34020000002000000001"
   realm:          "3402000000"
@@ -35,14 +35,15 @@ gb28181:
   heartbeatinterval: 60
   heartbeatretry:    3
   
-  mediaip:          
+  mediaip:          ""
   mediaport:        58200
   mediaidletimeout: 30
   medianetwork:     udp
-  
+  mediaportmin:     0
+  meidaportmax:     0
+
   removebaninterval: 600
   loglevel:         info
-  audioenable:       true
 ```
 
 - `AutoInvite`     bool 表示自动发起invite，当Server（SIP）接收到设备信息时，立即向设备发送invite命令获取流
@@ -68,12 +69,15 @@ gb28181:
 - `MediaPort`        uint16 媒体服务器端口
 - `MediaNetwork`     string 媒体传输协议，默认UDP，可选TCP
 - `MediaIdleTimeout` uint16 推流超时时间，超过则断开链接，让设备重连
-
+- `MediaPortMin`     uint16 媒体服务器端口范围最小值
+- `MediaPortMax`     uint16 媒体服务器端口范围最大值
 - `AudioEnable`       bool 是否开启音频
 - `LogLevel`        string 日志级别，默认 info（trace，debug，info，warn，error，fatal, panic）
 - `RemoveBanInterval` int  定时移除注册失败的设备黑名单，单位秒，默认10分钟（600秒）
 - `UdpCacheSize`      int  表示UDP缓存大小，默认为0，不开启。仅当TCP关闭，切缓存大于0时才开启，会最多缓存最多N个包，并排序，修复乱序造成的无法播放问题，注意开启后，会有一定的性能损耗，并丢失部分包。
 
+**如果配置了端口范围，将采用范围端口机制，每一个流对应一个端口
+
 **注意某些摄像机没有设置用户名的地方，摄像机会以自身的国标id作为用户名，这个时候m7s会忽略使用摄像机的用户名，忽略配置的用户名**
 如果设备配置了错误的用户名和密码，连续三次上报错误后，m7s会记录设备id，并在10分钟内禁止设备注册
 

channel.go

@@ -10,6 +10,7 @@ import (
 	"sync"
 	"time"
 
+	. "m7s.live/engine/v4"
 	"github.com/ghettovoice/gosip/sip"
 	"go.uber.org/zap"
 	"m7s.live/plugin/gb28181/v4/utils"
@@ -301,10 +302,10 @@ func (channel *Channel) Invite(opt InviteOptions) (code int, err error) {
 	if conf.IsMediaNetworkTCP() {
 		protocol = "TCP/"
 		if conf.tcpPorts.Valid {
-			// opt.MediaPort, err = publisher.ListenTCP()
-			// if err != nil {
-			// 	return 500, err
-			// }
+			opt.MediaPort, err = publisher.ListenTCP()
+			if err != nil {
+				return 500, err
+			}
 		} else if opt.MediaPort == 0 {
 			opt.MediaPort = conf.MediaPort
 		}
@@ -342,9 +343,9 @@ func (channel *Channel) Invite(opt InviteOptions) (code int, err error) {
 		"y=" + opt.ssrc,
 		"",
 	}
-	// if config.IsMediaNetworkTCP() {
-	// 	sdpInfo = append(sdpInfo, "a=setup:passive", "a=connection:new")
-	// }
+	if conf.IsMediaNetworkTCP() {
+		sdpInfo = append(sdpInfo, "a=setup:passive", "a=connection:new")
+	}
 	invite := channel.CreateRequst(sip.INVITE)
 	contentType := sip.ContentType("application/sdp")
 	invite.AppendHeader(&contentType)
@@ -393,6 +394,11 @@ func (channel *Channel) Invite(opt InviteOptions) (code int, err error) {
 }
 
 func (channel *Channel) Bye(live bool) int {
+	d := channel.device
+	streamPath := fmt.Sprintf("%s/%s", d.ID, channel.DeviceID)
+	if s := Streams.Get(streamPath); s != nil {
+		s.Close()
+	}
 	if live && channel.LivePublisher != nil {
 		return channel.LivePublisher.Bye()
 	}

publisher.go

@@ -1,7 +1,6 @@
 package gb28181
 
 import (
-	"encoding/binary"
 	"fmt"
 	"io"
 	"net"
@@ -12,6 +11,8 @@ import (
 	"github.com/pion/rtp/v2"
 	"go.uber.org/zap"
 	. "m7s.live/engine/v4"
+	. "m7s.live/engine/v4/codec"
+	"m7s.live/engine/v4/codec/mpegts"
 	. "m7s.live/engine/v4/track"
 	"m7s.live/engine/v4/util"
 	"m7s.live/plugin/gb28181/v4/utils"
@@ -28,6 +29,7 @@ type GBPublisher struct {
 	dumpFile    *os.File
 	dumpPrint   io.Writer
 	lastReceive time.Time
+	reorder     util.RTPReorder[*rtp.Packet]
 }
 
 func (p *GBPublisher) PrintDump(s string) {
@@ -108,15 +110,33 @@ func (p *GBPublisher) Bye() int {
 func (p *GBPublisher) PushVideo(pts uint32, dts uint32, payload []byte) {
 	if p.VideoTrack == nil {
 		switch p.parser.VideoStreamType {
-		case utils.StreamTypeH264:
+		case mpegts.STREAM_TYPE_H264:
 			p.VideoTrack = NewH264(p.Publisher.Stream)
-		case utils.StreamTypeH265:
+		case mpegts.STREAM_TYPE_H265:
 			p.VideoTrack = NewH265(p.Publisher.Stream)
 		default:
-			return
+			//推测编码类型
+			var maybe264 H264NALUType
+			maybe264 = maybe264.Parse(payload[4])
+			switch maybe264 {
+			case NALU_Non_IDR_Picture,
+				NALU_IDR_Picture,
+				NALU_SEI,
+				NALU_SPS,
+				NALU_PPS,
+				NALU_Access_Unit_Delimiter:
+				p.VideoTrack = NewH264(p.Publisher.Stream)
+			default:
+				p.Info("maybe h265", zap.Uint8("type", maybe264.Byte()))
+				p.VideoTrack = NewH265(p.Publisher.Stream)
+			}
 		}
 	}
-	p.PrintDump(fmt.Sprintf("<td>pts:%d dts:%d data: % 2X</td>", pts, dts, payload[:10]))
+	if len(payload) > 10 {
+		p.PrintDump(fmt.Sprintf("<td>pts:%d dts:%d data: % 2X</td>", pts, dts, payload[:10]))
+	} else {
+		p.PrintDump(fmt.Sprintf("<td>pts:%d dts:%d data: % 2X</td>", pts, dts, payload))
+	}
 	if dts == 0 {
 		dts = pts
 	}
@@ -125,73 +145,54 @@ func (p *GBPublisher) PushVideo(pts uint32, dts uint32, payload []byte) {
 func (p *GBPublisher) PushAudio(ts uint32, payload []byte) {
 	if p.AudioTrack == nil {
 		switch p.parser.AudioStreamType {
-		case utils.G711A:
+		case mpegts.STREAM_TYPE_G711A:
 			at := NewG711(p.Publisher.Stream, true)
 			at.Audio.SampleRate = 8000
 			at.Audio.SampleSize = 16
 			at.Channels = 1
 			at.AVCCHead = []byte{(byte(at.CodecID) << 4) | (1 << 1)}
 			p.AudioTrack = at
-		case utils.G711A + 1:
+		case mpegts.STREAM_TYPE_G711U:
 			at := NewG711(p.Publisher.Stream, false)
 			at.Audio.SampleRate = 8000
 			at.Audio.SampleSize = 16
 			at.Channels = 1
 			at.AVCCHead = []byte{(byte(at.CodecID) << 4) | (1 << 1)}
 			p.AudioTrack = at
+		case mpegts.STREAM_TYPE_AAC:
+			p.AudioTrack = NewAAC(p.Publisher.Stream)
+			p.WriteADTS(payload[:7])
 		default:
+			p.Error("audio type not supported yet", zap.Uint32("type", p.parser.AudioStreamType))
 			return
 		}
+	} else {
+		p.AudioTrack.WriteRaw(ts, payload)
 	}
-	p.AudioTrack.WriteAVCC(ts, payload)
 }
 
+// 解析rtp封装 https://www.ietf.org/rfc/rfc2250.txt
 func (p *GBPublisher) PushPS(rtp *rtp.Packet) {
-	originRtp := *rtp
-	if conf.UdpCacheSize > 0 && !conf.IsMediaNetworkTCP() {
-		//序号小于第一个包的丢弃,rtp包序号达到65535后会从0开始，所以这里需要判断一下
-		if rtp.SequenceNumber < p.lastSeq && p.lastSeq-rtp.SequenceNumber < utils.MaxRtpDiff {
-			return
-		}
-		p.udpCache.Push(*rtp)
-		rtpTmp, _ := p.udpCache.Pop()
-		rtp = &rtpTmp
+	if p.parser == nil {
+		p.parser = utils.NewDecPSPackage(p)
 	}
-	ps := rtp.Payload
-	if p.lastSeq != 0 {
-		// rtp序号不连续，丢弃PS
-		if p.lastSeq+1 != rtp.SequenceNumber {
-			if conf.UdpCacheSize > 0 && !conf.IsMediaNetworkTCP() {
-				if p.udpCache.Len() < conf.UdpCacheSize {
-					p.udpCache.Push(*rtp)
-					return
-				} else {
-					p.udpCache.Empty()
-					rtp = &originRtp // 还原rtp包，而不是使用缓存中，避免rtp序号断裂
+	if conf.IsMediaNetworkTCP() {
+		p.parser.Feed(rtp)
+		p.lastSeq = rtp.SequenceNumber
+	} else {
+		for rtp = p.reorder.Push(rtp.SequenceNumber, rtp); rtp != nil; rtp = p.reorder.Pop() {
+			if rtp.SequenceNumber != p.lastSeq+1 {
+				p.parser.Drop()
+				if p.VideoTrack != nil {
+					p.VideoTrack.SetLostFlag()
 				}
 			}
-			p.parser.Reset()
+			p.parser.Feed(rtp)
+			p.lastSeq = rtp.SequenceNumber
 		}
 	}
-	p.lastSeq = rtp.SequenceNumber
-	if p.parser == nil {
-		p.parser = new(utils.DecPSPackage)
-	}
-	if len(ps) >= 4 && binary.BigEndian.Uint32(ps) == utils.StartCodePS {
-		if p.parser.Len() > 0 {
-			p.parser.Skip(4)
-			p.PrintDump("</td></tr>")
-			p.PrintDump("<tr>")
-			p.parser.Read(rtp.Timestamp, p)
-			p.PrintDump("</tr>")
-			p.PrintDump("<tr  class=gray><td colspan=12>")
-			p.parser.Reset()
-		}
-		p.parser.Write(ps)
-	} else if p.parser.Len() > 0 {
-		p.parser.Write(ps)
-	}
 }
+
 func (p *GBPublisher) Replay(f *os.File) (err error) {
 	var rtpPacket rtp.Packet
 	defer f.Close()
@@ -205,7 +206,6 @@ func (p *GBPublisher) Replay(f *os.File) (err error) {
 		p.PrintDump("<table>")
 		defer p.PrintDump("</table>")
 	}
-	p.PrintDump("<tr class=gray><td colspan=12>")
 	var t uint16
 	for l := make([]byte, 6); !p.IsClosed(); time.Sleep(time.Millisecond * time.Duration(t)) {
 		_, err = f.Read(l)
@@ -236,16 +236,19 @@ func (p *GBPublisher) ListenUDP() (port uint16, err error) {
 	mediaAddr, _ := net.ResolveUDPAddr("udp", addr)
 	conn, err := net.ListenUDP("udp", mediaAddr)
 	if err != nil {
+		conf.udpPorts.Recycle(port)
 		plugin.Error("listen media server udp err", zap.String("addr", addr), zap.Error(err))
 		return 0, err
 	}
 	p.SetIO(conn)
 	go func() {
+		defer conn.Close()
 		bufUDP := make([]byte, networkBuffer)
 		plugin.Info("Media udp server start.", zap.Uint16("port", port))
 		defer plugin.Info("Media udp server stop", zap.Uint16("port", port))
 		defer conf.udpPorts.Recycle(port)
 		dumpLen := make([]byte, 6)
+		conn.SetReadDeadline(time.Now().Add(time.Second * 10))
 		for n, _, err := conn.ReadFromUDP(bufUDP); err == nil; n, _, err = conn.ReadFromUDP(bufUDP) {
 			ps := bufUDP[:n]
 			if err := rtpPacket.Unmarshal(ps); err != nil {
@@ -263,7 +266,37 @@ func (p *GBPublisher) ListenUDP() (port uint16, err error) {
 				p.dumpFile.Write(ps)
 			}
 			p.PushPS(&rtpPacket)
+			conn.SetReadDeadline(time.Now().Add(time.Second * 10))
 		}
 	}()
 	return
 }
+
+func (p *GBPublisher) ListenTCP() (port uint16, err error) {
+	port, err = conf.tcpPorts.GetPort()
+	if err != nil {
+		return
+	}
+	addr := fmt.Sprintf(":%d", port)
+	mediaAddr, _ := net.ResolveTCPAddr("tcp", addr)
+	listen, err := net.ListenTCP("tcp", mediaAddr)
+	if err != nil {
+		defer conf.tcpPorts.Recycle(port)
+		plugin.Error("listen media server tcp err", zap.String("addr", addr), zap.Error(err))
+		return 0, err
+	}
+	go func() {
+		plugin.Info("Media tcp server start.", zap.Uint16("port", port))
+		defer conf.tcpPorts.Recycle(port)
+		defer plugin.Info("Media tcp server stop", zap.Uint16("port", port))
+		conn, err := listen.Accept()
+		listen.Close()
+		p.SetIO(conn)
+		if err != nil {
+			plugin.Error("Accept err=", zap.Error(err))
+			return
+		}
+		processTcpMediaConn(conf, conn)
+	}()
+	return
+}

utils/buffer.go

@@ -60,6 +60,7 @@ func (b *IOBuffer) ReadByte() (byte, error) {
 	b.off++
 	return c, nil
 }
+
 func (b *IOBuffer) Reset() {
 	b.buf = b.buf[:0]
 	b.off = 0
@@ -81,20 +82,24 @@ func (b *IOBuffer) tryGrowByReslice(n int) (int, bool) {
 var ErrTooLarge = errors.New("IOBuffer: too large")
 
 func (b *IOBuffer) Write(p []byte) (n int, err error) {
-	defer func() {
-		if recover() != nil {
-			panic(ErrTooLarge)
-		}
-	}()
-	l := len(p)
-	oldLen := len(b.buf)
-	m, ok := b.tryGrowByReslice(l)
-	if !ok {
-		buf := make([]byte, oldLen+l)
-		copy(buf, b.buf[b.off:])
-		m = oldLen - b.off
-		b.off = 0
-		b.buf = buf
-	}
-	return copy(b.buf[m:], p), nil
+	l := copy(b.buf, b.buf[b.off:])
+	b.buf = append(b.buf[:l], p...)
+	b.off = 0
+	// println(b.buf, b.off, b.buf[b.off], b.buf[b.off+1], b.buf[b.off+2], b.buf[b.off+3])
+	return len(p), nil
+	// defer func() {
+	// 	if recover() != nil {
+	// 		panic(ErrTooLarge)
+	// 	}
+	// }()
+	// l := len(p)
+	// oldLen := len(b.buf)
+	// m, ok := b.tryGrowByReslice(l)
+	// if !ok {
+	// 	m = oldLen - b.off
+	// 	buf := append(append(([]byte)(nil), b.buf[b.off:]...), p...)
+	// 	b.off = 0
+	// 	b.buf = buf
+	// }
+	// return copy(b.buf[m:], p), nil
 }

utils/ps.go

@@ -4,31 +4,23 @@ import (
 	"encoding/binary"
 	"errors"
 	"fmt"
+	"io"
+
+	"github.com/pion/rtp/v2"
 )
 
-//
 const (
 	UDPTransfer        int = 0
 	TCPTransferActive  int = 1
 	TCPTransferPassive int = 2
 	LocalCache         int = 3
 
-	StreamTypeH264 = 0x1b
-	StreamTypeH265 = 0x24
-	G711A          = 0x90 //PCMA
-	G7221AUDIOTYPE = 0x92
-	G7231AUDIOTYPE = 0x93
-	G729AUDIOTYPE  = 0x99
-
-	StreamIDVideo = 0xe0
-	StreamIDAudio = 0xc0
-
 	StartCodePS        = 0x000001ba
 	StartCodeSYS       = 0x000001bb
 	StartCodeMAP       = 0x000001bc
 	StartCodeVideo     = 0x000001e0
 	StartCodeAudio     = 0x000001c0
-	HaiKangCode        = 0x000001bd
+	PrivateStreamCode  = 0x000001bd
 	MEPGProgramEndCode = 0x000001b9
 
 	RTPHeaderLength    int = 12
@@ -112,142 +104,172 @@ type Pusher interface {
 https://github.com/videolan/vlc/blob/master/modules/demux/mpeg
 */
 type DecPSPackage struct {
-	systemClockReferenceBase      uint64
-	systemClockReferenceExtension uint64
-	programMuxRate                uint32
+	// systemClockReferenceBase      uint64
+	// systemClockReferenceExtension uint64
+	// programMuxRate                uint32
 
 	VideoStreamType uint32
 	AudioStreamType uint32
 	IOBuffer
-	Payload []byte
-	PTS     uint32
-	DTS     uint32
+	Payload     []byte
+	videoBuffer []byte
+	audioBuffer []byte
+	PTS         uint32
+	DTS         uint32
+	Pusher
 }
 
-func (dec *DecPSPackage) clean() {
-	dec.systemClockReferenceBase = 0
-	dec.systemClockReferenceExtension = 0
-	dec.programMuxRate = 0
-	dec.Payload = nil
-	dec.PTS = 0
-	dec.DTS = 0
+func NewDecPSPackage(p Pusher) *DecPSPackage {
+	p.PrintDump("<tr><td>")
+	return &DecPSPackage{
+		Pusher: p,
+	}
 }
 
+// func (dec *DecPSPackage) clean() {
+// 	dec.systemClockReferenceBase = 0
+// 	dec.systemClockReferenceExtension = 0
+// 	dec.programMuxRate = 0
+// 	dec.Payload = nil
+// 	dec.PTS = 0
+// 	dec.DTS = 0
+// }
+
 func (dec *DecPSPackage) ReadPayload() (payload []byte, err error) {
 	payloadlen, err := dec.Uint16()
 	if err != nil {
 		return
 	}
-	return dec.ReadN(int(payloadlen))
+	if l := int(payloadlen); dec.Len() >= l {
+		return dec.Next(l), nil
+	}
+	return dec.Next(dec.Len()), io.EOF
 }
 
-//read the buffer and push video or audio
-func (dec *DecPSPackage) Read(ts uint32, pusher Pusher) error {
-	dec.clean()
-	dec.PTS = ts
-	pusher.PrintDump(fmt.Sprintf("<td>%d</td>", ts))
-	if err := dec.Skip(9); err != nil {
-		return err
-	}
+// Drop 由于丢包引起的必须丢弃的数据
+func (dec *DecPSPackage) Drop() {
+	dec.Reset()
+	dec.videoBuffer = nil
+	dec.audioBuffer = nil
+	dec.Payload = nil
+}
 
-	psl, err := dec.ReadByte()
-	if err != nil {
-		return err
+func (dec *DecPSPackage) Feed(rtp *rtp.Packet) (err error) {
+	ps := rtp.Payload
+	if len(ps) < 4 {
+		return nil
 	}
-	psl &= 0x07
-	if err = dec.Skip(int(psl)); err != nil {
-		return err
-	}
-	var video []byte
-	var nextStartCode uint32
-	pusher.PrintDump("<td>")
-loop:
-	for err == nil {
-		if nextStartCode, err = dec.Uint32(); err != nil {
-			break
+	switch binary.BigEndian.Uint32(ps) {
+	case StartCodePS, StartCodeSYS, StartCodeMAP, StartCodeVideo, StartCodeAudio, PrivateStreamCode, MEPGProgramEndCode:
+		defer dec.Write(ps)
+		if dec.Len() >= 4 {
+			//说明需要处理PS包，处理完后，清空缓存
+			defer dec.Reset()
+		} else {
+			return
 		}
-		switch nextStartCode {
-		case StartCodeSYS:
-			pusher.PrintDump("[sys]")
-			dec.ReadPayload()
-			//err = dec.decSystemHeader()
-		case StartCodeMAP:
-			err = dec.decProgramStreamMap()
-			pusher.PrintDump("[map]")
-		case StartCodeVideo:
-			if err = dec.decPESPacket(); err == nil {
-				// if len(video) == 0 {
-				// 	if dec.PTS == 0 {
-				// 		dec.PTS = ts
-				// 	}
-				// 	// if dec.DTS == 0 {
-				// 	// 	dec.DTS = dec.PTS
-				// 	// }
-				// }
-				video = append(video, dec.Payload...)
-			} else {
-				fmt.Println("video", err)
+	default:
+		// 说明是中间数据，直接写入缓存，否则数据不合法需要丢弃
+		if dec.Len() > 0 {
+			dec.Write(ps)
+		}
+		return nil
+	}
+	for dec.Len() >= 4 {
+		code, _ := dec.Uint32()
+		// println("code:", code)
+		switch code {
+		case StartCodePS:
+			dec.PrintDump("</td></tr><tr><td>")
+			if len(dec.audioBuffer) > 0 {
+				dec.PushAudio(dec.PTS, dec.audioBuffer)
+				dec.audioBuffer = nil
 			}
-			pusher.PrintDump("[video]")
+			if err := dec.Skip(9); err != nil {
+				return err
+			}
+			psl, err := dec.ReadByte()
+			if err != nil {
+				return err
+			}
+			psl &= 0x07
+			if err = dec.Skip(int(psl)); err != nil {
+				return err
+			}
+			if len(dec.videoBuffer) > 0 {
+				dec.PushVideo(dec.PTS, dec.DTS, dec.videoBuffer)
+				dec.videoBuffer = nil
+			}
+		case StartCodeSYS:
+			dec.PrintDump("</td><td>[sys]")
+			dec.ReadPayload()
+		case StartCodeMAP:
+			dec.decProgramStreamMap()
+			dec.PrintDump("</td><td>[map]")
+		case StartCodeVideo:
+			if dec.videoBuffer == nil {
+				dec.PrintDump("</td><td>")
+			}
+			err = dec.decPESPacket()
+			// if err != nil {
+			//说明还有后续数据，需要继续处理
+			// println(rtp.SequenceNumber)
+			// }
+			dec.videoBuffer = append(dec.videoBuffer, dec.Payload...)
+			dec.PrintDump("[video]")
 		case StartCodeAudio:
+			if dec.audioBuffer == nil {
+				dec.PrintDump("</td><td>")
+			}
 			if err = dec.decPESPacket(); err == nil {
-				ts := ts / 90
-				if dec.PTS != 0 {
-					ts = dec.PTS / 90
-				}
-				pusher.PushAudio(ts, dec.Payload)
-				pusher.PrintDump("[audio]")
+				dec.audioBuffer = append(dec.audioBuffer, dec.Payload...)
+				dec.PrintDump("[audio]")
 			} else {
 				fmt.Println("audio", err)
 			}
-		case StartCodePS:
-			break loop
-		default:
-			pusher.PrintDump(fmt.Sprintf("[%d]", nextStartCode))
+		case PrivateStreamCode:
 			dec.ReadPayload()
+			dec.PrintDump("</td></tr><tr><td>[ac3]")
+		case MEPGProgramEndCode:
+			dec.PrintDump("</td></tr>")
+			return io.EOF
+		default:
+			fmt.Println("unknow code", code)
+			return ErrParsePakcet
 		}
 	}
-	if len(video) > 0 {
-		pusher.PrintDump("</td>")
-		pusher.PushVideo(dec.PTS, dec.DTS, video)
-		video = nil
-	}
-	if nextStartCode == StartCodePS {
-		// fmt.Println(aurora.Red("StartCodePS recursion..."), err)
-		return dec.Read(ts, pusher)
-	}
-	return err
-}
-
-/*
-func (dec *DecPSPackage) decSystemHeader() error {
-	syslens, err := dec.Uint16()
-	if err != nil {
-		return err
-	}
-	// drop rate video audio bound and lock flag
-	syslens -= 6
-	if err = dec.Skip(6); err != nil {
-		return err
-	}
-
-	// ONE WAY: do not to parse the stream  and skip the buffer
-	//br.Skip(syslen * 8)
-
-	// TWO WAY: parse every stream info
-	for syslens > 0 {
-		if nextbits, err := dec.Uint8(); err != nil {
-			return err
-		} else if (nextbits&0x80)>>7 != 1 {
-			break
-		}
-		if err = dec.Skip(2); err != nil {
-			return err
-		}
-		syslens -= 3
-	}
 	return nil
 }
+
+/*
+	func (dec *DecPSPackage) decSystemHeader() error {
+		syslens, err := dec.Uint16()
+		if err != nil {
+			return err
+		}
+		// drop rate video audio bound and lock flag
+		syslens -= 6
+		if err = dec.Skip(6); err != nil {
+			return err
+		}
+
+		// ONE WAY: do not to parse the stream  and skip the buffer
+		//br.Skip(syslen * 8)
+
+		// TWO WAY: parse every stream info
+		for syslens > 0 {
+			if nextbits, err := dec.Uint8(); err != nil {
+				return err
+			} else if (nextbits&0x80)>>7 != 1 {
+				break
+			}
+			if err = dec.Skip(2); err != nil {
+				return err
+			}
+			syslens -= 3
+		}
+		return nil
+	}
 */
 func (dec *DecPSPackage) decProgramStreamMap() error {
 	psm, err := dec.ReadPayload()
@@ -287,9 +309,7 @@ func (dec *DecPSPackage) decProgramStreamMap() error {
 
 func (dec *DecPSPackage) decPESPacket() error {
 	payload, err := dec.ReadPayload()
-	if err != nil {
-		return err
-	}
+
 	if len(payload) < 4 {
 		return errors.New("not enough data")
 	}