@spec getBackendName(Keyword.t()) :: any() | {:error, String.t()}

@spec getBackendName(Evision.VideoCaptureAPIs.enum()) ::
  binary() | {:error, String.t()}

Returns backend API name or "UnknownVideoAPI(xxx)"

Positional Arguments

• api: VideoCaptureAPIs.

  backend ID (#VideoCaptureAPIs)

Return

• retval: String

Python prototype (for reference only):

getBackendName(api) -> retval

@spec getBackends() :: [Evision.VideoCaptureAPIs.enum()] | {:error, String.t()}

Returns list of all available backends

Return

• retval: [VideoCaptureAPIs]

Python prototype (for reference only):

getBackends() -> retval

@spec getCameraBackendPluginVersion(Keyword.t()) :: any() | {:error, String.t()}

@spec getCameraBackendPluginVersion(Evision.VideoCaptureAPIs.enum()) ::
  {binary(), integer(), integer()} | {:error, String.t()}

Returns description and ABI/API version of videoio plugin's camera interface

Positional Arguments

• api: VideoCaptureAPIs

Return

• retval: string
• version_ABI: integer()
• version_API: integer()

Python prototype (for reference only):

getCameraBackendPluginVersion(api) -> retval, version_ABI, version_API

@spec getCameraBackends() :: [Evision.VideoCaptureAPIs.enum()] | {:error, String.t()}

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

Return

• retval: [VideoCaptureAPIs]

Python prototype (for reference only):

getCameraBackends() -> retval

@spec getStreamBackendPluginVersion(Keyword.t()) :: any() | {:error, String.t()}

@spec getStreamBackendPluginVersion(Evision.VideoCaptureAPIs.enum()) ::
  {binary(), integer(), integer()} | {:error, String.t()}

Returns description and ABI/API version of videoio plugin's stream capture interface

Positional Arguments

• api: VideoCaptureAPIs

Return

• retval: string
• version_ABI: integer()
• version_API: integer()

Python prototype (for reference only):

getStreamBackendPluginVersion(api) -> retval, version_ABI, version_API

@spec getStreamBackends() :: [Evision.VideoCaptureAPIs.enum()] | {:error, String.t()}

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

Return

• retval: [VideoCaptureAPIs]

Python prototype (for reference only):

getStreamBackends() -> retval

@spec getWriterBackendPluginVersion(Keyword.t()) :: any() | {:error, String.t()}

@spec getWriterBackendPluginVersion(Evision.VideoCaptureAPIs.enum()) ::
  {binary(), integer(), integer()} | {:error, String.t()}

Returns description and ABI/API version of videoio plugin's writer interface

Positional Arguments

• api: VideoCaptureAPIs

Return

• retval: string
• version_ABI: integer()
• version_API: integer()

Python prototype (for reference only):

getWriterBackendPluginVersion(api) -> retval, version_ABI, version_API

@spec getWriterBackends() :: [Evision.VideoCaptureAPIs.enum()] | {:error, String.t()}

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

Return

• retval: [VideoCaptureAPIs]

Python prototype (for reference only):

getWriterBackends() -> retval

@spec hasBackend(Keyword.t()) :: any() | {:error, String.t()}

@spec hasBackend(Evision.VideoCaptureAPIs.enum()) :: boolean() | {:error, String.t()}

Returns true if backend is available

Positional Arguments

• api: VideoCaptureAPIs

Return

• retval: bool

Python prototype (for reference only):

hasBackend(api) -> retval

@spec isBackendBuiltIn(Keyword.t()) :: any() | {:error, String.t()}

@spec isBackendBuiltIn(Evision.VideoCaptureAPIs.enum()) ::
  boolean() | {:error, String.t()}

Returns true if backend is built in (false if backend is used as plugin)

Positional Arguments

• api: VideoCaptureAPIs

Return

• retval: bool

Python prototype (for reference only):

isBackendBuiltIn(api) -> retval