message: read in gray scale mode when writing a gray scale video
diff: @@ -28,7 +28,7 @@ PERF_TEST_P(VideoWriter_Writing, WriteFrame,
  {
  const string filename = getDataPath(get<0>(GetParam()));
  const bool isColor = get<1>(GetParam());
  - Mat image = imread(filename, 1);
  + Mat image = imread(filename, isColor ? IMREAD_COLOR : IMREAD_GRAYSCALE );
  #if defined(HAVE_MSMF) && !defined(HAVE_VFW) && !defined(HAVE_FFMPEG) // VFW has greater priority
  const string outfile = cv::tempfile(".wmv");
  const int fourcc = VideoWriter::fourcc('W', 'M', 'V', '3');
  