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videoio(doc): fix 'since' version

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This commit is contained in:
Alexander Alekhin 2019-08-20 13:15:56 +03:00
parent 19a4b51371
commit 6a439ae53d
1 changed files with 1 additions and 1 deletions
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modules/videoio/doc/videoio_overview.markdown
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@ -59,7 +59,7 @@ cap.open(filename, cv::CAP_DSHOW);
#### How to enable backends
There are two kinds of videoio backends: built-in backends and plugins which will be loaded at runtime (since OpenCV 4.1.1). Use functions cv::videoio_registry::getBackends, cv::videoio_registry::hasBackend and cv::videoio_registry::getBackendName to check actual presence of backend during runtime.
There are two kinds of videoio backends: built-in backends and plugins which will be loaded at runtime (since OpenCV 4.1.0). Use functions cv::videoio_registry::getBackends, cv::videoio_registry::hasBackend and cv::videoio_registry::getBackendName to check actual presence of backend during runtime.
To enable built-in videoio backends:
1. Enable corresponding CMake option, e.g. `-DWITH_GSTREAMER=ON`