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videoio(test): skip GStreamer in 'frame_timestamp' tests

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- CAP_PROP_POS_MSEC is not reliable
This commit is contained in:
Alexander Alekhin 2020-12-07 21:18:47 +00:00
parent a9f4f8ded4
commit 962f5c9b82
2 changed files with 10 additions and 1 deletions
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2
modules/videoio/src/cap_gstreamer.cpp
View File

@ -1062,6 +1062,8 @@ double GStreamerCapture::getProperty(int propId) const
switch(propId)
{
case CV_CAP_PROP_POS_MSEC:
CV_LOG_ONCE_WARNING(NULL, "OpenCV | GStreamer: CAP_PROP_POS_MSEC property result may be unrealiable: "
"https://github.com/opencv/opencv/issues/19025");
format = GST_FORMAT_TIME;
status = gst_element_query_position(sink.get(), CV_GST_FORMAT(format), &value);
if(!status) {

9
modules/videoio/test/test_video_io.cpp
View File

@ -237,6 +237,11 @@ public:
if (!isBackendAvailable(apiPref, cv::videoio_registry::getStreamBackends()))
throw SkipTestException(cv::String("Backend is not available/disabled: ") + cv::videoio_registry::getBackendName(apiPref));
// GStreamer: https://github.com/opencv/opencv/issues/19025
if (apiPref == CAP_GSTREAMER)
throw SkipTestException(cv::String("Backend ") + cv::videoio_registry::getBackendName(apiPref) +
cv::String(" does not return reliable values for CAP_PROP_POS_MSEC property"));
if (((apiPref == CAP_FFMPEG) && ((ext == "h264") || (ext == "h265"))))
throw SkipTestException(cv::String("Backend ") + cv::videoio_registry::getBackendName(apiPref) +
cv::String(" does not support CAP_PROP_POS_MSEC option"));
@ -253,10 +258,12 @@ public:
double timestamp = 0;
ASSERT_NO_THROW(cap >> img);
EXPECT_NO_THROW(timestamp = cap.get(CAP_PROP_POS_MSEC));
if (cvtest::debugLevel > 0)
std::cout << "i = " << i << ": timestamp = " << timestamp << std::endl;
const double frame_period = 1000.f/bunny_param.getFps();
// NOTE: eps == frame_period, because videoCapture returns frame begining timestamp or frame end
// timestamp depending on codec and back-end. So the first frame has timestamp 0 or frame_period.
EXPECT_NEAR(timestamp, i*frame_period, frame_period);
EXPECT_NEAR(timestamp, i*frame_period, frame_period) << "i=" << i;
}
}
};