diff --git a/codec_parameters.go b/codec_parameters.go
index fc1aaf5..d5a3c0d 100644
--- a/codec_parameters.go
+++ b/codec_parameters.go
@@ -32,10 +32,18 @@ func (cp *CodecParameters) ChannelLayout() ChannelLayout {
 	return ChannelLayout(cp.c.channel_layout)
 }
 
+func (cp *CodecParameters) SetChannelLayout(l ChannelLayout) {
+	cp.c.channel_layout = C.uint64_t(l)
+}
+
 func (cp *CodecParameters) Channels() int {
 	return int(cp.c.channels)
 }
 
+func (cp *CodecParameters) SetChannels(c int) {
+	cp.c.channels = C.int(c)
+}
+
 func (cp *CodecParameters) CodecID() CodecID {
 	return CodecID(cp.c.codec_id)
 }
@@ -124,10 +132,18 @@ func (cp *CodecParameters) SampleFormat() SampleFormat {
 	return SampleFormat(cp.c.format)
 }
 
+func (cp *CodecParameters) SetSampleFormat(f SampleFormat) {
+	cp.c.format = C.int(f)
+}
+
 func (cp *CodecParameters) SampleRate() int {
 	return int(cp.c.sample_rate)
 }
 
+func (cp *CodecParameters) SetSampleRate(r int) {
+	cp.c.sample_rate = C.int(r)
+}
+
 func (cp *CodecParameters) Width() int {
 	return int(cp.c.width)
 }
diff --git a/codec_parameters_test.go b/codec_parameters_test.go
index 0becc19..59d141a 100644
--- a/codec_parameters_test.go
+++ b/codec_parameters_test.go
@@ -63,6 +63,11 @@ func TestCodecParameters(t *testing.T) {
 	cp6 := astiav.AllocCodecParameters()
 	require.NotNil(t, cp6)
 	defer cp6.Free()
+	cp6.SetChannelLayout(astiav.ChannelLayout21)
+	require.Equal(t, astiav.ChannelLayout21, cp6.ChannelLayout())
+	defer cp6.Free()
+	cp6.SetChannels(3)
+	require.Equal(t, 3, cp6.Channels())
 	cp6.SetCodecID(astiav.CodecIDRawvideo)
 	require.Equal(t, astiav.CodecIDRawvideo, cp6.CodecID())
 	cp6.SetCodecTag(astiav.CodecTag(2))
@@ -75,6 +80,10 @@ func TestCodecParameters(t *testing.T) {
 	require.Equal(t, astiav.PixelFormat0Bgr, cp6.PixelFormat())
 	cp6.SetSampleAspectRatio(astiav.NewRational(1, 2))
 	require.Equal(t, astiav.NewRational(1, 2), cp6.SampleAspectRatio())
+	cp6.SetSampleFormat(astiav.SampleFormatDbl)
+	require.Equal(t, astiav.SampleFormatDbl, cp6.SampleFormat())
+	cp6.SetSampleRate(4)
+	require.Equal(t, 4, cp6.SampleRate())
 	cp6.SetWidth(2)
 	require.Equal(t, 2, cp6.Width())
 }