message: Extended video timestamp test to cover fix for the issue
diff: @@ -215,8 +215,28 @@ public:
  throw SkipTestException(cv::String("Backend ") + cv::videoio_registry::getBackendName(apiPref) +
  cv::String(" can't open the video: ") + video_file);
  + int frame_count = (int)cap.get(CAP_PROP_FRAME_COUNT);
  +
  + // HACK: Video consists of 125 frames, but cv::VideoCapture with FFmpeg reports only 122 frames for mpg video.
  + // mpg file reports 5.08 sec * 24 fps => property returns 122 frames,but actual number of frames returned is 125
  + // HACK: CAP_PROP_FRAME_COUNT is not supported for vmw + MSMF. Just force check for all 125 frames
  + if (ext == "mpg")
  + EXPECT_GT(frame_count, 121);
  + else if ((ext == "wmv") && (apiPref == CAP_MSMF))
  + frame_count = 125;
  + else
  + EXPECT_EQ(frame_count, 125);
  Mat img;
  - for(int i = 0; i < 10; i++)
  +
  +#ifdef _WIN32 // handle old FFmpeg wrapper on Windows till rebuild
  + frame_count = 10;
  +#else
  + // HACK: FFmpeg reports picture_pts = AV_NOPTS_VALUE_ for the last frame for AVI container by some reason
  + if ((ext == "avi") && (apiPref == CAP_FFMPEG))
  + frame_count--;
  +#endif
  +
  + for (int i = 0; i < frame_count; i++)
  {
  double timestamp = 0;
  ASSERT_NO_THROW(cap >> img);
  