feat: add split and asplit filters

filter/filter.go

@@ -109,3 +109,27 @@ func formatTransformOptionValue(value string) string {
 	}
 	return value
 }
+
+type rawFilter struct {
+	str     string
+	outputs int
+}
+
+func Raw(str string, outputs int) Filter {
+	return &rawFilter{
+		str:     str,
+		outputs: outputs,
+	}
+}
+
+func (f *rawFilter) With(key string, value expr.Expr) Filter {
+	return f
+}
+
+func (f *rawFilter) String() string {
+	return f.str
+}
+
+func (f *rawFilter) Outputs() int {
+	return f.outputs
+}

filter/filters/asplit.go

@@ -0,0 +1,13 @@
+package filters
+
+import (
+	"fmt"
+
+	"github.com/spiretechnology/spireav/filter"
+)
+
+// AudioSplit corresponds to the "asplit" FFmpeg filter.
+// Documentation: https://ffmpeg.org/ffmpeg-filters.html#asplit
+func AudioSplit(outputs int) filter.Filter {
+	return filter.Raw(fmt.Sprintf("asplit=%d", outputs), outputs)
+}

filter/filters/split.go

@@ -0,0 +1,13 @@
+package filters
+
+import (
+	"fmt"
+
+	"github.com/spiretechnology/spireav/filter"
+)
+
+// Split corresponds to the "split" FFmpeg filter.
+// Documentation: https://ffmpeg.org/ffmpeg-filters.html#split
+func Split(outputs int) filter.Filter {
+	return filter.Raw(fmt.Sprintf("split=%d", outputs), outputs)
+}