Functions
cv::String	cv::videoio_registry::getBackendName (VideoCaptureAPIs api)
	Returns backend API name or "unknown".

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

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

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

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

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

Detailed Description

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

Function Documentation

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

Returns backend API name or "unknown".

Parameters

api	backend ID (VideoCaptureAPIs)

std::vector<VideoCaptureAPIs> cv::videoio_registry::getBackends ( )

Returns list of all builtin backends.

std::vector<VideoCaptureAPIs> cv::videoio_registry::getCameraBackends ( )

Returns list of available backends which works via cv::VideoCapture(int index)

std::vector<VideoCaptureAPIs> cv::videoio_registry::getStreamBackends ( )

Returns list of available backends which works via cv::VideoCapture(filename)

std::vector<VideoCaptureAPIs> cv::videoio_registry::getWriterBackends ( )

Returns list of available backends which works via cv::VideoWriter()

bool cv::videoio_registry::hasBackend ( VideoCaptureAPIs api )

Returns true if backend is available.