関数
CV_EXPORTS_W cv::String	cv::videoio_registry::getBackendName (VideoCaptureAPIs api)
	Returns backend API name or "UnknownVideoAPI(xxx)" [詳解]

CV_EXPORTS_W std::vector< VideoCaptureAPIs >	cv::videoio_registry::getBackends ()
	Returns list of all available backends

CV_EXPORTS_W std::vector< VideoCaptureAPIs >	cv::videoio_registry::getCameraBackends ()
	Returns list of available backends which works via `cv::VideoCapture(int index)`

CV_EXPORTS_W std::vector< VideoCaptureAPIs >	cv::videoio_registry::getStreamBackends ()
	Returns list of available backends which works via `cv::VideoCapture(filename)`

CV_EXPORTS_W std::vector< VideoCaptureAPIs >	cv::videoio_registry::getWriterBackends ()
	Returns list of available backends which works via `cv::VideoWriter()`

CV_EXPORTS_W bool	cv::videoio_registry::hasBackend (VideoCaptureAPIs api)
	Returns true if backend is available

CV_EXPORTS_W bool	cv::videoio_registry::isBackendBuiltIn (VideoCaptureAPIs api)
	Returns true if backend is built in (false if backend is used as plugin)

CV_EXPORTS_W std::string	cv::videoio_registry::getCameraBackendPluginVersion (VideoCaptureAPIs api, CV_OUT int &version_ABI, CV_OUT int &version_API)
	Returns description and ABI/API version of videoio plugin's camera interface

CV_EXPORTS_W std::string	cv::videoio_registry::getStreamBackendPluginVersion (VideoCaptureAPIs api, CV_OUT int &version_ABI, CV_OUT int &version_API)
	Returns description and ABI/API version of videoio plugin's stream capture interface

CV_EXPORTS_W std::string	cv::videoio_registry::getWriterBackendPluginVersion (VideoCaptureAPIs api, CV_OUT int &version_ABI, CV_OUT int &version_API)
	Returns description and ABI/API version of videoio plugin's writer interface

詳解

This section contains API description how to query/configure available Video I/O backends.

Runtime configuration options:

enable debug mode: OPENCV_VIDEOIO_DEBUG=1
change backend priority: OPENCV_VIDEOIO_PRIORITY_<backend>=9999
disable backend: OPENCV_VIDEOIO_PRIORITY_<backend>=0
specify list of backends with high priority (>100000): OPENCV_VIDEOIO_PRIORITY_LIST=FFMPEG,GSTREAMER

関数詳解

◆ getBackendName()

CV_EXPORTS_W cv::String cv::videoio_registry::getBackendName ( VideoCaptureAPIs api )

Returns backend API name or "UnknownVideoAPI(xxx)"

引数

api	backend ID (VideoCaptureAPIs)