Struct cv::cudacodec::VideoReaderInitParams#

VideoReader initialization parameters. View details

#include <opencv2/cudacodec.hpp>

Collaboration diagram for cv::cudacodec::VideoReaderInitParams:

cv::cudacodec::VideoReaderInitParams Node1 cv::cudacodec::VideoReader InitParams   + VideoReaderInitParams() Node2 bool     Node2->Node1 +allowFrameDrop +enableHistogram +rawMode +udpSource Node3 int     Node3->Node1 +firstFrameIdx +minNumDecodeSurfaces Node4 cv::Size_< _Tp >   + Size_() + Size_() + Size_() + Size_() + Size_() + area() + aspectRatio() + empty() + operator Size_< _Tp2 >() + operator=() + operator=() Node4->Node1 +targetSz Node5 _Tp     Node5->Node4 +height +width Node6 cv::Rect_< _Tp >   + Rect_() + Rect_() + Rect_() + Rect_() + Rect_() + Rect_() + area() + br() + contains() + empty() + operator Rect_< _Tp2 >() + operator=() + operator=() + size() + tl() Node5->Node6 +height +width +x +y Node6->Node1 +srcRoi +targetRoi

cv::cudacodec::VideoReaderInitParams Node1 cv::cudacodec::VideoReader InitParams   + VideoReaderInitParams() Node2 bool     Node2->Node1 +allowFrameDrop +enableHistogram +rawMode +udpSource Node3 int     Node3->Node1 +firstFrameIdx +minNumDecodeSurfaces Node4 cv::Size_< _Tp >   + Size_() + Size_() + Size_() + Size_() + Size_() + area() + aspectRatio() + empty() + operator Size_< _Tp2 >() + operator=() + operator=() Node4->Node1 +targetSz Node5 _Tp     Node5->Node4 +height +width Node6 cv::Rect_< _Tp >   + Rect_() + Rect_() + Rect_() + Rect_() + Rect_() + Rect_() + area() + br() + contains() + empty() + operator Rect_< _Tp2 >() + operator=() + operator=() + size() + tl() Node5->Node6 +height +width +x +y Node6->Node1 +srcRoi +targetRoi

Detailed Description#

struct VideoReaderInitParams

VideoReader initialization parameters.

Param udpSource:

Remove validation which can cause VideoReader() to throw exceptions when reading from a UDP source.

Param allowFrameDrop:

Allow frames to be dropped when ingesting from a live capture source to prevent delay and eventual disconnection when calls to nextFrame()/grab() cannot keep up with the source’s fps. Only use if delay and disconnection are a problem, i.e. not when decoding from video files where setting this flag will cause frames to be unnecessarily discarded.

Param minNumDecodeSurfaces:

Minimum number of internal decode surfaces used by the hardware decoder. NVDEC will automatically determine the minimum number of surfaces it requires for correct functionality and optimal video memory usage but not necessarily for best performance, which depends on the design of the overall application. The optimal number of decode surfaces (in terms of performance and memory utilization) should be decided by experimentation for each application, but it cannot go below the number determined by NVDEC.

Param rawMode:

Allow the raw encoded data which has been read up until the last call to grab() to be retrieved by calling retrieve(rawData,RAW_DATA_IDX).

Param targetSz:

Post-processed size (width/height should be multiples of 2) of the output frame, defaults to the size of the encoded video source.

Param srcRoi:

Region of interest (x/width should be multiples of 4 and y/height multiples of 2) decoded from video source, defaults to the full frame.

Param targetRoi:

Region of interest (x/width should be multiples of 4 and y/height multiples of 2) within the output frame to copy and resize the decoded frame to, defaults to the full frame.

Param enableHistogram:

Request output of decoded luma histogram hist from VideoReader::nextFrame(GpuMat& frame, GpuMat& hist, Stream& stream), if hardware supported.

Param firstFrameIdx:

Index of the first frame to seek to on initialization of the VideoReader.

Constructor & Destructor Documentation#

VideoReaderInitParams()#

cv::cudacodec::VideoReaderInitParams::VideoReaderInitParams()

Member Data Documentation#

allowFrameDrop#

bool cv::cudacodec::VideoReaderInitParams::allowFrameDrop

enableHistogram#

bool cv::cudacodec::VideoReaderInitParams::enableHistogram

firstFrameIdx#

int cv::cudacodec::VideoReaderInitParams::firstFrameIdx

minNumDecodeSurfaces#

int cv::cudacodec::VideoReaderInitParams::minNumDecodeSurfaces

rawMode#

bool cv::cudacodec::VideoReaderInitParams::rawMode

srcRoi#

cv::Rect cv::cudacodec::VideoReaderInitParams::srcRoi

targetRoi#

cv::Rect cv::cudacodec::VideoReaderInitParams::targetRoi

targetSz#

cv::Size cv::cudacodec::VideoReaderInitParams::targetSz

udpSource#

bool cv::cudacodec::VideoReaderInitParams::udpSource

Source file#

The documentation for this struct was generated from the following file: