diff --git a/subscriber.go b/subscriber.go
index 43fb653..0d03af2 100644
--- a/subscriber.go
+++ b/subscriber.go
@@ -228,7 +228,7 @@ func (s *Subscriber) PlayBlock(spesic ISubscriber) {
 					if s.VideoTrack.IDRing.Value.Sequence != firstIFrame.Sequence {
 						firstIFrame = nil
 						s.vr = s.VideoTrack.ReadRing()
-						s.Debug("skip to latest key frame")
+						s.Debug("skip to latest key frame", zap.Uint32("seq", s.VideoTrack.IDRing.Value.Sequence))
 						continue
 					} else {
 						vp = (*VideoFrame)(s.vr.Read(ctx))
diff --git a/util/buffer.go b/util/buffer.go
index 26dbf15..3aa02cd 100644
--- a/util/buffer.go
+++ b/util/buffer.go
@@ -97,6 +97,7 @@ func SizeOfBuffers[T ~[]byte](buf []T) (size int) {
 
 // SplitBuffers 按照一定大小分割 Buffers
 func SplitBuffers[T ~[]byte](buf []T, size int) (result [][]T) {
+	buf = append([]T(nil), buf...)
 	for total := SizeOfBuffers(buf); total > 0; {
 		if total <= size {
 			return append(result, buf)