diff --git a/go.mod b/go.mod
index a059d172..495f9f82 100644
--- a/go.mod
+++ b/go.mod
@@ -12,7 +12,7 @@ require (
 	github.com/asticode/go-astits v1.15.0
 	github.com/bluenviron/gohlslib/v2 v2.4.0
 	github.com/bluenviron/gortmplib v0.4.0
-	github.com/bluenviron/gortsplib/v5 v5.5.5-0.20260610213428-fb7a9dca6ded
+	github.com/bluenviron/gortsplib/v5 v5.5.5-0.20260610215215-4cff4156075d
 	github.com/bluenviron/mediacommon/v2 v2.9.0
 	github.com/datarhei/gosrt v0.11.0
 	github.com/fsnotify/fsnotify v1.10.1
diff --git a/go.sum b/go.sum
index b8e96984..bab13cc0 100644
--- a/go.sum
+++ b/go.sum
@@ -39,8 +39,8 @@ github.com/bluenviron/gohlslib/v2 v2.4.0 h1:O0bmUvyOMVPuRx3givLqfGWUzOKicKwkSCIn
 github.com/bluenviron/gohlslib/v2 v2.4.0/go.mod h1:iqU6QJ5geVuCDpUeAbK/Si2RtDC3ocBTp8LnPHBkN6U=
 github.com/bluenviron/gortmplib v0.4.0 h1:ydwTrOUxFOJkKagzXON2IetEP2yVQwRByzClpapSODc=
 github.com/bluenviron/gortmplib v0.4.0/go.mod h1:6AAQoyC8vSHnw02fCW6Kjll93Hk1rEH4+S0uy5NFyDM=
-github.com/bluenviron/gortsplib/v5 v5.5.5-0.20260610213428-fb7a9dca6ded h1:RH7gq7G2k4xHpZU9fgBigXvM78NEmE0iJdKDn4wzhCU=
-github.com/bluenviron/gortsplib/v5 v5.5.5-0.20260610213428-fb7a9dca6ded/go.mod h1:sT0KqICjZKSpHmx7R3xFRY1tfgP2iMe2bF3i3MxX/jE=
+github.com/bluenviron/gortsplib/v5 v5.5.5-0.20260610215215-4cff4156075d h1:fLpgWxE6YC95+7qvuhWYLmz4LjajNFUrhlwuIjEIVDk=
+github.com/bluenviron/gortsplib/v5 v5.5.5-0.20260610215215-4cff4156075d/go.mod h1:sT0KqICjZKSpHmx7R3xFRY1tfgP2iMe2bF3i3MxX/jE=
 github.com/bluenviron/mediacommon/v2 v2.9.0 h1:8gBeby10B/qD8ctnesKTHx3pgdsxiZcaQZe+RR6Djx4=
 github.com/bluenviron/mediacommon/v2 v2.9.0/go.mod h1:syqw4j2RmBCKZgUtGFtB/7gcnh1aaX8I3vd24+bgXWc=
 github.com/bytedance/gopkg v0.1.3 h1:TPBSwH8RsouGCBcMBktLt1AymVo2TVsBVCY4b6TnZ/M=
diff --git a/internal/stream/stream_format.go b/internal/stream/stream_format.go
index f9ef50f5..7972106d 100644
--- a/internal/stream/stream_format.go
+++ b/internal/stream/stream_format.go
@@ -51,6 +51,7 @@ type streamFormat struct {
 	parent               logger.Writer
 
 	outFormat     format.Format
+	forceRemux    bool
 	ptsOffset     int64
 	formatUpdater formatUpdater
 	unitRemuxer   unitRemuxer
@@ -62,6 +63,13 @@ type streamFormat struct {
 
 func (sf *streamFormat) initialize() error {
 	sf.outFormat = cloneFormatShallow(sf.origFormat)
+
+	if forma, ok := sf.outFormat.(*format.H264); ok && forma.PacketizationMode == 0 {
+		sf.parent.Log(logger.Info, "remuxing in order to change H264 packetization-mode from 0 to 1")
+		forma.PacketizationMode = 1
+		sf.forceRemux = true
+	}
+
 	sf.formatUpdater = newFormatUpdater(sf.outFormat)
 	sf.unitRemuxer = newUnitRemuxer(sf.outFormat)
 
diff --git a/internal/stream/stream_standard_test.go b/internal/stream/stream_standard_test.go
index 8935c765..c915e34e 100644
--- a/internal/stream/stream_standard_test.go
+++ b/internal/stream/stream_standard_test.go
@@ -1307,3 +1307,29 @@ func TestStreamEncode(t *testing.T) {
 		})
 	}
 }
+
+func TestStreamUpgradeH264PacketizationMode(t *testing.T) {
+	forma := &format.H264{
+		PacketizationMode: 0,
+		SPS:               []byte{0x67, 0x42, 0xc0, 0x28},
+		PPS:               []byte{0x08, 0x06},
+	}
+
+	strm := &Stream{
+		OrigDesc:          &description.Session{Medias: []*description.Media{{Formats: []format.Format{forma}}}},
+		WriteQueueSize:    512,
+		RTPMaxPayloadSize: 1450,
+		Parent:            &nilLogger{},
+	}
+	err := strm.Initialize()
+	require.NoError(t, err)
+	defer strm.Close()
+
+	outDesc := strm.OutDescCopy()
+
+	require.Equal(t, &format.H264{
+		PacketizationMode: 1,
+		SPS:               []byte{0x67, 0x42, 0xc0, 0x28},
+		PPS:               []byte{0x08, 0x06},
+	}, outDesc.Medias[0].Formats[0])
+}
diff --git a/internal/stream/sub_stream_format.go b/internal/stream/sub_stream_format.go
index 8aa315d4..f523ec95 100644
--- a/internal/stream/sub_stream_format.go
+++ b/internal/stream/sub_stream_format.go
@@ -27,7 +27,9 @@ func (ssf *subStreamFormat) initialize() error {
 		}
 	}
 
-	if ssf.streamFormat.rtpEncoder == nil && (!ssf.useRTPPackets || ssf.streamFormat.alwaysAvailable) {
+	if ssf.streamFormat.rtpEncoder == nil && (!ssf.useRTPPackets ||
+		ssf.streamFormat.alwaysAvailable ||
+		ssf.streamFormat.forceRemux) {
 		var err error
 		ssf.streamFormat.rtpEncoder, err = newRTPEncoder(
 			ssf.streamFormat.outFormat,