diff --git a/internal/transport/videochannel/transport.go b/internal/transport/videochannel/transport.go
index a90cff2..fae93db 100644
--- a/internal/transport/videochannel/transport.go
+++ b/internal/transport/videochannel/transport.go
@@ -390,6 +390,7 @@ func (p *streamTransport) handleRemoteTrack(track *webrtc.TrackRemote, _ *webrtc
 }
 
 func (p *streamTransport) handleFrame(frame []byte) {
+	logger.Debugf("videochannel handleFrame: len=%d videoCodec=%s", len(frame), p.videoCodec)
 	var payload []byte
 	var err error
 	if p.videoCodec == "b" {
diff --git a/internal/transport/videochannel/visual_b.go b/internal/transport/videochannel/visual_b.go
index 8605c5c..4b5d87b 100644
--- a/internal/transport/videochannel/visual_b.go
+++ b/internal/transport/videochannel/visual_b.go
@@ -5,6 +5,7 @@ package videochannel
 import (
 	"fmt"
 
+	"github.com/openlibrecommunity/olcrtc/internal/logger"
 	"github.com/zarazaex69/b/go"
 )
 
@@ -59,6 +60,7 @@ func extractVisualPayloadB(frame []byte, width, height int) ([]byte, error) {
 	cfg := b.DefaultConfig()
 	decoded, err := b.Decode(frame, uint32(width), uint32(height), cfg)
 	if err != nil {
+		logger.Debugf("b decode failed: %v", err)
 		return nil, nil
 	}