Evision
v0.1.34

View Source Evision.CUDACodec (Evision v0.1.34)

Summary

Types

t()

Type that represents an CUDACodec struct.

Functions

createVideoReader(source)

Variant 1:

createVideoReader

createVideoReader(source, opts)

Variant 1:

createVideoReader

createVideoWriter(fileName, frameSize)

Creates video writer.

createVideoWriter(fileName, frameSize, opts)

Creates video writer.

createVideoWriter(fileName, frameSize, codec, fps, colorFormat, params)

Creates video writer.

createVideoWriter(fileName, frameSize, codec, fps, colorFormat, params, opts)

Creates video writer.

Types

Link to this type

t()

View Source 
@type t() :: %Evision.CUDACodec{ref: reference()}

Type that represents an CUDACodec struct.

  • ref. reference()

    The underlying erlang resource variable.

Functions

Link to this function

createVideoReader(source)

View Source 
@spec createVideoReader(Evision.CUDACodec.RawVideoSource.t()) ::
  Evision.CUDACodec.VideoReader.t() | {:error, String.t()}
@spec createVideoReader(binary()) ::
  Evision.CUDACodec.VideoReader.t() | {:error, String.t()}

Variant 1:

createVideoReader

Positional Arguments

  • source: RawVideoSource.

    RAW video source implemented by user.

Keyword Arguments

  • params: VideoReaderInitParams.

    Initializaton parameters. See cv::cudacodec::VideoReaderInitParams.

Return
  • retval: VideoReader

Has overloading in C++

Python prototype (for reference only):

createVideoReader(source[, params]) -> retval

Variant 2:

Creates video reader.

Positional Arguments

  • filename: String.

    Name of the input video file.

Keyword Arguments

  • sourceParams: [int].

    Pass through parameters for VideoCapure. VideoCapture with the FFMpeg back end (CAP_FFMPEG) is used to parse the video input. The sourceParams parameter allows to specify extra parameters encoded as pairs (paramId_1, paramValue_1, paramId_2, paramValue_2, ...). See cv::VideoCaptureProperties e.g. when streaming from an RTSP source CAP_PROP_OPEN_TIMEOUT_MSEC may need to be set.

  • params: VideoReaderInitParams.

    Initializaton parameters. See cv::cudacodec::VideoReaderInitParams.

Return
  • retval: VideoReader

FFMPEG is used to read videos. User can implement own demultiplexing with cudacodec::RawVideoSource

Python prototype (for reference only):

createVideoReader(filename[, sourceParams[, params]]) -> retval
Link to this function

createVideoReader(source, opts)

View Source 
@spec createVideoReader(
  Evision.CUDACodec.RawVideoSource.t(),
  [{atom(), term()}, ...] | nil
) ::
  Evision.CUDACodec.VideoReader.t() | {:error, String.t()}
@spec createVideoReader(binary(), [{atom(), term()}, ...] | nil) ::
  Evision.CUDACodec.VideoReader.t() | {:error, String.t()}

Variant 1:

createVideoReader

Positional Arguments

  • source: RawVideoSource.

    RAW video source implemented by user.

Keyword Arguments

  • params: VideoReaderInitParams.

    Initializaton parameters. See cv::cudacodec::VideoReaderInitParams.

Return
  • retval: VideoReader

Has overloading in C++

Python prototype (for reference only):

createVideoReader(source[, params]) -> retval

Variant 2:

Creates video reader.

Positional Arguments

  • filename: String.

    Name of the input video file.

Keyword Arguments

  • sourceParams: [int].

    Pass through parameters for VideoCapure. VideoCapture with the FFMpeg back end (CAP_FFMPEG) is used to parse the video input. The sourceParams parameter allows to specify extra parameters encoded as pairs (paramId_1, paramValue_1, paramId_2, paramValue_2, ...). See cv::VideoCaptureProperties e.g. when streaming from an RTSP source CAP_PROP_OPEN_TIMEOUT_MSEC may need to be set.

  • params: VideoReaderInitParams.

    Initializaton parameters. See cv::cudacodec::VideoReaderInitParams.

Return
  • retval: VideoReader

FFMPEG is used to read videos. User can implement own demultiplexing with cudacodec::RawVideoSource

Python prototype (for reference only):

createVideoReader(filename[, sourceParams[, params]]) -> retval
Link to this function

createVideoWriter(fileName, frameSize)

View Source 
@spec createVideoWriter(
  binary(),
  {number(), number()}
) :: Evision.CUDACodec.VideoWriter.t() | {:error, String.t()}

Creates video writer.

Positional Arguments

  • fileName: String.

    Name of the output video file. Only raw h264 or hevc files are supported.

  • frameSize: Size.

    Size of the input video frames.

Keyword Arguments

  • codec: Codec.

    Codec.

  • fps: double.

    Framerate of the created video stream.

  • colorFormat: ColorFormat.

    OpenCv color format of the frames to be encoded.

  • encoderCallback: EncoderCallback.

    Callbacks for video encoder. See cudacodec::EncoderCallback. Required for working with the encoded video stream.

  • stream: Evision.CUDA.Stream.t().

    Stream for frame pre-processing.

Return
  • retval: Evision.CUDACodec.VideoWriter.t()

Python prototype (for reference only):

createVideoWriter(fileName, frameSize[, codec[, fps[, colorFormat[, encoderCallback[, stream]]]]]) -> retval
Link to this function

createVideoWriter(fileName, frameSize, opts)

View Source 
@spec createVideoWriter(binary(), {number(), number()}, [{atom(), term()}, ...] | nil) ::
  Evision.CUDACodec.VideoWriter.t() | {:error, String.t()}

Creates video writer.

Positional Arguments

  • fileName: String.

    Name of the output video file. Only raw h264 or hevc files are supported.

  • frameSize: Size.

    Size of the input video frames.

Keyword Arguments

  • codec: Codec.

    Codec.

  • fps: double.

    Framerate of the created video stream.

  • colorFormat: ColorFormat.

    OpenCv color format of the frames to be encoded.

  • encoderCallback: EncoderCallback.

    Callbacks for video encoder. See cudacodec::EncoderCallback. Required for working with the encoded video stream.

  • stream: Evision.CUDA.Stream.t().

    Stream for frame pre-processing.

Return
  • retval: Evision.CUDACodec.VideoWriter.t()

Python prototype (for reference only):

createVideoWriter(fileName, frameSize[, codec[, fps[, colorFormat[, encoderCallback[, stream]]]]]) -> retval
Link to this function

createVideoWriter(fileName, frameSize, codec, fps, colorFormat, params)

View Source 
@spec createVideoWriter(
  binary(),
  {number(), number()},
  Evision.CUDACodec.Codec.t(),
  number(),
  Evision.CUDACodec.ColorFormat.t(),
  Evision.CUDACodec.EncoderParams.t()
) :: Evision.CUDACodec.VideoWriter.t() | {:error, String.t()}

Creates video writer.

Positional Arguments

  • fileName: String.

    Name of the output video file. Only raw h264 or hevc files are supported.

  • frameSize: Size.

    Size of the input video frames.

  • codec: Codec.

    Codec.

  • fps: double.

    Framerate of the created video stream.

  • colorFormat: ColorFormat.

    OpenCv color format of the frames to be encoded.

  • params: EncoderParams.

    Additional encoding parameters.

Keyword Arguments

  • encoderCallback: EncoderCallback.

    Callbacks for video encoder. See cudacodec::EncoderCallback. Required for working with the encoded video stream.

  • stream: Evision.CUDA.Stream.t().

    Stream for frame pre-processing.

Return
  • retval: Evision.CUDACodec.VideoWriter.t()

Python prototype (for reference only):

createVideoWriter(fileName, frameSize, codec, fps, colorFormat, params[, encoderCallback[, stream]]) -> retval
Link to this function

createVideoWriter(fileName, frameSize, codec, fps, colorFormat, params, opts)

View Source 
@spec createVideoWriter(
  binary(),
  {number(), number()},
  Evision.CUDACodec.Codec.t(),
  number(),
  Evision.CUDACodec.ColorFormat.t(),
  Evision.CUDACodec.EncoderParams.t(),
  [{atom(), term()}, ...] | nil
) :: Evision.CUDACodec.VideoWriter.t() | {:error, String.t()}

Creates video writer.

Positional Arguments

  • fileName: String.

    Name of the output video file. Only raw h264 or hevc files are supported.

  • frameSize: Size.

    Size of the input video frames.

  • codec: Codec.

    Codec.

  • fps: double.

    Framerate of the created video stream.

  • colorFormat: ColorFormat.

    OpenCv color format of the frames to be encoded.

  • params: EncoderParams.

    Additional encoding parameters.

Keyword Arguments

  • encoderCallback: EncoderCallback.

    Callbacks for video encoder. See cudacodec::EncoderCallback. Required for working with the encoded video stream.

  • stream: Evision.CUDA.Stream.t().

    Stream for frame pre-processing.

Return
  • retval: Evision.CUDACodec.VideoWriter.t()

Python prototype (for reference only):

createVideoWriter(fileName, frameSize, codec, fps, colorFormat, params[, encoderCallback[, stream]]) -> retval