cleanup decodebin example

examples/decodebin/main.go

@@ -135,8 +135,11 @@ func handleMessage(msg *gst.Message) error {
 	return nil
 }
 
-func runPipeline(pipeline *gst.Pipeline) error {
+func runPipeline(loop *gst.MainLoop, pipeline *gst.Pipeline) error {
+	defer loop.Quit()
+
 	pipeline.SetState(gst.StatePlaying)
+	defer pipeline.Destroy()
 
 	bus := pipeline.GetPipelineBus()
 
@@ -165,6 +168,6 @@ func main() {
 		if err != nil {
 			return err
 		}
-		return runPipeline(pipeline)
+		return runPipeline(loop, pipeline)
 	})
 }

gst/gst_structure.go

@@ -15,6 +15,7 @@ import "C"
 import (
 	"errors"
 	"fmt"
+	"os"
 	"reflect"
 	"sync"
 	"unsafe"
@@ -67,7 +68,9 @@ func MarshalStructure(data interface{}) *Structure {
 	for i := 0; i < valsOf.NumField(); i++ {
 		gval := valsOf.Field(i).Interface()
 		fieldName := typeOf.Field(i).Name
-		st.SetValue(fieldName, gval)
+		if err := st.SetValue(fieldName, gval); err != nil {
+			fmt.Fprintf(os.Stderr, "Failed to set %v for %s", gval, fieldName)
+		}
 	}
 	return st
 }