diff --git a/pkg/rtc/dynacast/dynacastmanager.go b/pkg/rtc/dynacast/dynacastmanager.go
index e32b9a0cc..f7697a838 100644
--- a/pkg/rtc/dynacast/dynacastmanager.go
+++ b/pkg/rtc/dynacast/dynacastmanager.go
@@ -187,7 +187,7 @@ func (d *DynacastManager) getOrCreateDynacastQuality(mimeType mime.MimeType) *Dy
 	d.lock.Lock()
 	defer d.lock.Unlock()
 
-	if d.isClosed {
+	if d.isClosed || mimeType == mime.MimeTypeUnknown {
 		return nil
 	}
 
diff --git a/pkg/sfu/downtrack.go b/pkg/sfu/downtrack.go
index 4faa09886..9cfdcc8c8 100644
--- a/pkg/sfu/downtrack.go
+++ b/pkg/sfu/downtrack.go
@@ -364,6 +364,7 @@ func NewDownTrack(params DowntrackParams) (*DownTrack, error) {
 		upstreamCodecs:      codecs,
 		kind:                kind,
 		codec:               codecs[0].RTPCodecCapability,
+		mime:                mime.NormalizeMimeType(codecs[0].MimeType),
 		clockRate:           codecs[0].ClockRate,
 		pacer:               params.Pacer,
 		maxLayerNotifierCh:  make(chan string, 1),
diff --git a/pkg/sfu/mime/mimetype.go b/pkg/sfu/mime/mimetype.go
index 5e78c57d5..118a7bad8 100644
--- a/pkg/sfu/mime/mimetype.go
+++ b/pkg/sfu/mime/mimetype.go
@@ -41,6 +41,7 @@ const (
 	MimeTypeCodecPCMA
 	MimeTypeCodecRTX
 	MimeTypeCodecFlexFEC
+	MimeTypeCodecULPFEC
 )
 
 func (m MimeTypeCodec) String() string {
@@ -71,6 +72,8 @@ func (m MimeTypeCodec) String() string {
 		return "rtx"
 	case MimeTypeCodecFlexFEC:
 		return "flexfec"
+	case MimeTypeCodecULPFEC:
+		return "ulpfec"
 	}
 
 	return "MimeTypeCodecUnknown"
@@ -102,6 +105,8 @@ func NormalizeMimeTypeCodec(codec string) MimeTypeCodec {
 		return MimeTypeCodecRTX
 	case strings.EqualFold(codec, "flexfec"):
 		return MimeTypeCodecFlexFEC
+	case strings.EqualFold(codec, "ulpfec"):
+		return MimeTypeCodecULPFEC
 	}
 
 	return MimeTypeCodecUnknown
@@ -144,6 +149,7 @@ const (
 	MimeTypePCMA
 	MimeTypeRTX
 	MimeTypeFlexFEC
+	MimeTypeULPFEC
 )
 
 func (m MimeType) String() string {
@@ -174,6 +180,8 @@ func (m MimeType) String() string {
 		return webrtc.MimeTypeRTX
 	case MimeTypeFlexFEC:
 		return webrtc.MimeTypeFlexFEC
+	case MimeTypeULPFEC:
+		return "video/ulpfec"
 	}
 
 	return "MimeTypeUnknown"
@@ -205,6 +213,8 @@ func NormalizeMimeType(mime string) MimeType {
 		return MimeTypeRTX
 	case strings.EqualFold(mime, webrtc.MimeTypeFlexFEC):
 		return MimeTypeFlexFEC
+	case strings.EqualFold(mime, "video/ulpfec"):
+		return MimeTypeULPFEC
 	}
 
 	return MimeTypeUnknown