add log for extpacket accumulated (#2454)

pkg/sfu/buffer/buffer.go

@@ -121,8 +121,9 @@ type Buffer struct {
 	frameRateCalculator [DefaultMaxLayerSpatial + 1]FrameRateCalculator
 	frameRateCalculated bool
 
-	packetNotFoundCount atomic.Uint32
-	packetTooOldCount   atomic.Uint32
+	packetNotFoundCount   atomic.Uint32
+	packetTooOldCount     atomic.Uint32
+	extPacketTooMuchCount atomic.Uint32
 
 	primaryBufferForRTX *Buffer
 }
@@ -570,6 +571,12 @@ func (b *Buffer) calc(rawPkt []byte, rtpPacket *rtp.Packet, arrivalTime time.Tim
 	}
 	b.extPackets.PushBack(ep)
 
+	if b.extPackets.Len() > b.bucket.Capacity() {
+		if (b.extPacketTooMuchCount.Inc()-1)%100 == 0 {
+			b.logger.Warnw("too much ext packets", nil, "count", b.extPackets.Len())
+		}
+	}
+
 	b.doFpsCalc(ep)
 }