SetStreamIndex

program.go

@@ -75,6 +75,13 @@ func (p *Program) StreamIndex() *uint {
 	return &u
 }
 
+// https://ffmpeg.org/doxygen/7.0/structAVProgram.html#a7967d41af4812ed61a28762e988c7a02
+func (p *Program) SetStreamIndex(n uint) {
+	if p.c.stream_index != nil {
+		*p.c.stream_index = C.uint(n)
+	}
+}
+
 // https://ffmpeg.org/doxygen/7.0/structAVProgram.html#ae9dab38d4694e3da9cba0f882f4e43d3
 func (p *Program) Metadata() *Dictionary {
 	return newDictionaryFromC(p.c.metadata)

program_test.go

@@ -16,7 +16,6 @@ func TestProgram(t *testing.T) {
 	require.Equal(t, 2, p.ID())
 	p.SetDiscard(DiscardAll)
 	require.Equal(t, DiscardAll, p.Discard())
-	require.Nil(t, p.StreamIndex(), nil)
 	d := NewDictionary()
 	require.NoError(t, d.Set("service_name", "test_service_name", 0))
 	p.SetMetadata(d)
@@ -34,8 +33,14 @@ func TestProgram(t *testing.T) {
 	s := fc.NewStream(nil)
 	s.SetID(2)
 	require.Equal(t, 0, p.NbStreams())
+	require.Nil(t, p.StreamIndex(), nil)
 	p.AddStream(s)
 	require.Equal(t, 1, p.NbStreams())
+	require.Equal(t, uint(0), *p.StreamIndex())
+	var streamIndex uint = 1
+	p.SetStreamIndex(streamIndex)
+	require.Equal(t, streamIndex, *p.StreamIndex())
+	s.SetIndex(int(streamIndex))
 	ss := p.Streams()
 	require.Equal(t, 1, len(ss))
 	require.Equal(t, s.ID(), ss[0].ID())