Merge pull request #3485 from asmorkalov:as/cuda_codec_get

Promote cv::VideoCapture properties in VideoReader

Author: asmorkalov

modules/cudacodec/src/ffmpeg_video_source.cpp

@@ -192,13 +192,18 @@ void cv::cudacodec::detail::FFmpegVideoSource::updateFormat(const FormatInfo& vi
 
 bool cv::cudacodec::detail::FFmpegVideoSource::get(const int propertyId, double& propertyVal) const
 {
+    propertyVal = cap.get(propertyId);
+    if (propertyVal != 0.)
+        return true;
+
     CV_Assert(videoCaptureParams.size() % 2 == 0);
     for (std::size_t i = 0; i < videoCaptureParams.size(); i += 2) {
         if (videoCaptureParams.at(i) == propertyId) {
             propertyVal = videoCaptureParams.at(i + 1);
             return true;
         }
     }
+
     return false;
 }
 

modules/cudacodec/test/test_video.cpp

@@ -430,6 +430,19 @@ CUDA_TEST_P(CheckParams, Reader)
     }
 }
 
+CUDA_TEST_P(CheckParams, CaptureProps)
+{
+    std::string inputFile = std::string(cvtest::TS::ptr()->get_data_path()) + "../highgui/video/big_buck_bunny.mp4";
+    cv::Ptr<cv::cudacodec::VideoReader> reader = cv::cudacodec::createVideoReader(inputFile);
+    double width, height, fps;
+    ASSERT_TRUE(reader->get(cv::VideoCaptureProperties::CAP_PROP_FRAME_WIDTH, width));
+    ASSERT_EQ(672, width);
+    ASSERT_TRUE(reader->get(cv::VideoCaptureProperties::CAP_PROP_FRAME_HEIGHT, height));
+    ASSERT_EQ(384, height);
+    ASSERT_TRUE(reader->get(cv::VideoCaptureProperties::CAP_PROP_FPS, fps));
+    ASSERT_EQ(24, fps);
+}
+
 CUDA_TEST_P(CheckDecodeSurfaces, Reader)
 {
     cv::cuda::setDevice(GET_PARAM(0).deviceID());
@@ -554,6 +567,7 @@ CUDA_TEST_P(TransCode, H264ToH265)
 }
 
 INSTANTIATE_TEST_CASE_P(CUDA_Codec, TransCode, ALL_DEVICES);
+
 #endif
 
 #if defined(HAVE_NVCUVENC)