diff --git a/rtmp/packet.go b/rtmp/packet.go
index 138dd917..b88b15bc 100644
--- a/rtmp/packet.go
+++ b/rtmp/packet.go
@@ -205,7 +205,7 @@ func (pkt *packet) readFrom(s *Session) error {
 		pkt.resize(pkt.bodySize, (hbuf[0]&0xc0)>>6)
 	}
 
-	toRead := int32(pkt.bodySize - pkt.bytesRead)
+	toRead := pkt.bodySize - pkt.bytesRead
 	chunkSize := s.inChunkSize
 
 	if toRead < chunkSize {
@@ -376,12 +376,12 @@ func (pkt *packet) writeTo(s *Session, queue bool) error {
 		if ts > 0xffffff {
 			tmp = 0xffffff
 		}
-		amf.EncodeInt24(headBytes[headerIdx:], int32(tmp))
+		amf.EncodeInt24(headBytes[headerIdx:], tmp)
 		headerIdx += 3 // 24bits
 	}
 
 	if headerSizes[pkt.headerType] > 4 {
-		amf.EncodeInt24(headBytes[headerIdx:], int32(pkt.bodySize))
+		amf.EncodeInt24(headBytes[headerIdx:], pkt.bodySize)
 		headerIdx += 3 // 24bits
 		headBytes[headerIdx] = pkt.packetType
 		headerIdx++
@@ -393,7 +393,7 @@ func (pkt *packet) writeTo(s *Session, queue bool) error {
 	}
 
 	if ts >= 0xffffff {
-		amf.EncodeInt32(headBytes[headerIdx:], int32(ts))
+		amf.EncodeInt32(headBytes[headerIdx:], ts)
 		headerIdx += 4 // 32bits
 	}
 
@@ -463,7 +463,7 @@ func (pkt *packet) writeTo(s *Session, queue bool) error {
 			}
 			if ts >= 0xffffff {
 				extendedTimestamp := headBytes[origIdx+1+cSize:]
-				amf.EncodeInt32(extendedTimestamp[:4], int32(ts))
+				amf.EncodeInt32(extendedTimestamp[:4], ts)
 			}
 		}
 	}
diff --git a/rtmp/rtmp.go b/rtmp/rtmp.go
index d0a34e77..c79f8352 100644
--- a/rtmp/rtmp.go
+++ b/rtmp/rtmp.go
@@ -249,18 +249,18 @@ func handlePacket(s *Session, pkt *packet) error {
 
 	switch pkt.packetType {
 	case packetTypeChunkSize:
-		s.inChunkSize = int32(amf.DecodeInt32(pkt.body[:4]))
+		s.inChunkSize = amf.DecodeInt32(pkt.body[:4])
 
 	case packetTypeBytesReadReport:
-		s.serverBW = int32(amf.DecodeInt32(pkt.body[:4]))
+		s.serverBW = amf.DecodeInt32(pkt.body[:4])
 
 	case packetTypeServerBW:
-		s.serverBW = int32(amf.DecodeInt32(pkt.body[:4]))
+		s.serverBW = amf.DecodeInt32(pkt.body[:4])
 
 	case packetTypeClientBW:
-		s.clientBW = int32(amf.DecodeInt32(pkt.body[:4]))
+		s.clientBW = amf.DecodeInt32(pkt.body[:4])
 		if pkt.bodySize > 4 {
-			s.clientBW2 = pkt.body[4]
+			s.clientBW2 = uint32(pkt.body[4])
 		} else {
 			s.clientBW2 = 0xff
 		}
diff --git a/rtmp/session.go b/rtmp/session.go
index f555d00e..766522d5 100644
--- a/rtmp/session.go
+++ b/rtmp/session.go
@@ -44,14 +44,14 @@ import (
 // Session holds the state for an RTMP session.
 type Session struct {
 	url                  string
-	inChunkSize          int32
-	outChunkSize         int32
-	nBytesIn             int32
-	nBytesInSent         int32
+	inChunkSize          uint32
+	outChunkSize         uint32
+	nBytesIn             uint32
+	nBytesInSent         uint32
 	streamID             int32
-	serverBW             int32
-	clientBW             int32
-	clientBW2            uint8
+	serverBW             uint32
+	clientBW             uint32
+	clientBW2            uint32
 	isPlaying            bool
 	numInvokes           int32
 	methodCalls          []method
@@ -207,7 +207,7 @@ func (s *Session) read(buf []byte) (int, error) {
 		s.log(DebugLevel, pkg+"read failed", "error", err.Error())
 		return 0, err
 	}
-	s.nBytesIn += int32(n)
+	s.nBytesIn += uint32(n)
 	if s.nBytesIn > (s.nBytesInSent + s.clientBW/10) {
 		err := sendBytesReceived(s)
 		if err != nil {