refactor(ffmpeg): process on select frame

* refactor(ffmpeg): process on select frame

* reset golden

* test: update golden files

ffmpeg/ffmpeg.go

@@ -97,6 +97,9 @@ func (av *AVContext) SelectFrame(n int) (err error) {
 		nn = av.thumbContext.n - 1
 	}
 	av.selectedIndex = nn
+	if err = av.ProcessFrames(-1); err != nil {
+		return
+	}
 	return nil
 }
 

ffmpeg/ffmpeg_test.go

@@ -72,9 +72,6 @@ func TestAVContext(t *testing.T) {
 					if frame > -1 {
 						require.NoError(t, av.SelectFrame(frame))
 					}
-					if frame != 9999 {
-						require.NoError(t, av.ProcessFrames(-1))
-					}
 				}
 				meta := av.Metadata()
 				metaBuf, err := json.Marshal(meta)