diff --git a/pkg/rtc/dynacast/dynacastmanager.go b/pkg/rtc/dynacast/dynacastmanager.go
index b2ef9bc20..e32b9a0cc 100644
--- a/pkg/rtc/dynacast/dynacastmanager.go
+++ b/pkg/rtc/dynacast/dynacastmanager.go
@@ -114,8 +114,7 @@ func (d *DynacastManager) HandleCodecRegression(fromMime, toMime mime.MimeType)
 	d.update(false)
 
 	fromDq.Stop()
-	ToDq := d.getOrCreateDynacastQuality(toMime)
-	fromDq.RegressTo(ToDq)
+	fromDq.RegressTo(d.getOrCreateDynacastQuality(toMime))
 }
 
 func (d *DynacastManager) Restart() {
diff --git a/pkg/rtc/mediatrackreceiver.go b/pkg/rtc/mediatrackreceiver.go
index 6aff85278..1bffa5657 100644
--- a/pkg/rtc/mediatrackreceiver.go
+++ b/pkg/rtc/mediatrackreceiver.go
@@ -238,9 +238,9 @@ func (t *MediaTrackReceiver) SetupReceiver(receiver sfu.TrackReceiver, priority
 	onSetupReceiver := t.onSetupReceiver
 	t.lock.Unlock()
 
-	var receiverCodecs []mime.MimeType
+	var receiverCodecs []string
 	for _, r := range receivers {
-		receiverCodecs = append(receiverCodecs, r.Mime())
+		receiverCodecs = append(receiverCodecs, r.Mime().String())
 	}
 	t.params.Logger.Debugw(
 		"setup receiver",
@@ -667,7 +667,7 @@ func (t *MediaTrackReceiver) SetLayerSsrc(mimeType mime.MimeType, rid string, ss
 	quality := buffer.SpatialLayerToVideoQuality(layer, trackInfo)
 	// set video layer ssrc info
 	for i, ci := range trackInfo.Codecs {
-		if mime.NormalizeMimeType(ci.MimeType) == mimeType {
+		if mime.NormalizeMimeType(ci.MimeType) != mimeType {
 			continue
 		}