GetAudio: avoid leaking goroutine on cancellation

backend/media/get_audio.go

@@ -173,25 +173,14 @@ func (s *audioGetterState) getAudio(ctx context.Context, r io.ReadCloser, mediaS
 	})
 
 	g.Go(func() error {
+		defer func() { _ = r.Close() }()
+		defer func() { _ = uploadWriter.Close() }()
+		defer func() { _ = ffmpegWriter.Close() }()
+
 		if _, err := io.Copy(mw, streamWithProgress); err != nil {
 			return fmt.Errorf("error copying: %v", err)
 		}
 
-		// ignoring the following Close errors should be ok, as the Copy has
-		// already completed successfully.
-
-		if err := ffmpegWriter.Close(); err != nil {
-			s.logger.With("err", err).Warn("getAudio: unable to close ffmpegWriter")
-		}
-
-		if err := uploadWriter.Close(); err != nil {
-			s.logger.With("err", err).Warn("getAudio: unable to close pipeWriter")
-		}
-
-		if err := r.Close(); err != nil {
-			s.logger.With("err", err).Warn("getAudio: unable to close stream")
-		}
-
 		return nil
 	})