Merge pull request #22089 from tailsu:sd/fix-displaymatrix-orientation

modules/videoio/src/cap_ffmpeg_impl.hpp

@@ -1840,7 +1840,7 @@ void CvCapture_FFMPEG::get_rotation_angle()
     data = av_stream_get_side_data(video_st, AV_PKT_DATA_DISPLAYMATRIX, NULL);
     if (data)
     {
-        rotation_angle = cvRound(av_display_rotation_get((const int32_t*)data));
+        rotation_angle = -cvRound(av_display_rotation_get((const int32_t*)data));
         if (rotation_angle < 0)
             rotation_angle += 360;
     }

modules/videoio/test/test_ffmpeg.cpp

@@ -413,6 +413,11 @@ TEST(videoio, mp4_orientation_meta_auto)
     EXPECT_NO_THROW(cap.open(video_file, CAP_FFMPEG));
     ASSERT_TRUE(cap.isOpened()) << "Can't open the video: " << video_file << " with backend " << CAP_FFMPEG << std::endl;
 
+#ifndef _WIN32 // TODO: FFmpeg wrapper update
+    // related issue: https://github.com/opencv/opencv/issues/22088
+    EXPECT_EQ(90, cap.get(CAP_PROP_ORIENTATION_META));
+#endif
+
     cap.set(CAP_PROP_ORIENTATION_AUTO, true);
     if (cap.get(CAP_PROP_ORIENTATION_AUTO) == 0)
         throw SkipTestException("FFmpeg frame rotation metadata is not supported");