OpenCV
4.10.0
Open Source Computer Vision
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Classes | |
struct | cv::cudacodec::EncodeQp |
class | cv::cudacodec::EncoderCallback |
Interface for encoder callbacks. More... | |
struct | cv::cudacodec::EncoderParams |
Different parameters for CUDA video encoder. More... | |
struct | cv::cudacodec::FormatInfo |
Struct providing information about video file format. : More... | |
class | cv::cudacodec::RawVideoSource |
Interface for video demultiplexing. : More... | |
class | cv::cudacodec::VideoReader |
Video reader interface, see createVideoReader(). More... | |
struct | cv::cudacodec::VideoReaderInitParams |
VideoReader initialization parameters. More... | |
class | cv::cudacodec::VideoWriter |
Video writer interface, see createVideoWriter(). More... | |
Functions | |
Ptr< VideoReader > | cv::cudacodec::createVideoReader (const Ptr< RawVideoSource > &source, const VideoReaderInitParams params=VideoReaderInitParams()) |
Ptr< VideoReader > | cv::cudacodec::createVideoReader (const String &filename, const std::vector< int > &sourceParams={}, const VideoReaderInitParams params=VideoReaderInitParams()) |
Creates video reader. | |
Ptr< cudacodec::VideoWriter > | cv::cudacodec::createVideoWriter (const String &fileName, const Size frameSize, const Codec codec, const double fps, const ColorFormat colorFormat, const EncoderParams ¶ms, Ptr< EncoderCallback > encoderCallback=0, const cuda::Stream &stream=cuda::Stream::Null()) |
Creates video writer. | |
Ptr< cudacodec::VideoWriter > | cv::cudacodec::createVideoWriter (const String &fileName, const Size frameSize, const Codec codec=Codec::H264, const double fps=25.0, const ColorFormat colorFormat=ColorFormat::BGR, Ptr< EncoderCallback > encoderCallback=0, const cuda::Stream &stream=cuda::Stream::Null()) |
Creates video writer. | |
void | cv::cudacodec::MapHist (const cuda::GpuMat &hist, Mat &histFull) |
Utility function demonstrating how to map the luma histogram when FormatInfo::videoFullRangeFlag == false. | |
bool | cv::cudacodec::operator== (const EncoderParams &lhs, const EncoderParams &rhs) |
#include <opencv2/cudacodec.hpp>
Chroma formats supported by cudacodec::VideoReader.
Enumerator | |
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Monochrome | |
YUV420 | |
YUV422 | |
YUV444 | |
NumFormats |
enum cv::cudacodec::Codec |
#include <opencv2/cudacodec.hpp>
Video codecs supported by cudacodec::VideoReader and cudacodec::VideoWriter.
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#include <opencv2/cudacodec.hpp>
ColorFormat for the frame returned by VideoReader::nextFrame() and VideoReader::retrieve() or used to initialize a VideoWriter.
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UNDEFINED | |
BGRA | OpenCV color format, can be used with both VideoReader and VideoWriter. |
BGR | OpenCV color format, can be used with both VideoReader and VideoWriter. |
GRAY | OpenCV color format, can be used with both VideoReader and VideoWriter. |
NV_NV12 | Nvidia color format - equivalent to YUV - Semi-Planar YUV [Y plane followed by interleaved UV plane], can be used with both VideoReader and VideoWriter. |
RGB | OpenCV color format, can only be used with VideoWriter. |
RGBA | OpenCV color format, can only be used with VideoWriter. |
NV_YV12 | Nvidia Buffer Format - Planar YUV [Y plane followed by V and U planes], use with VideoReader, can only be used with VideoWriter. |
NV_IYUV | Nvidia Buffer Format - Planar YUV [Y plane followed by U and V planes], use with VideoReader, can only be used with VideoWriter. |
NV_YUV444 | Nvidia Buffer Format - Planar YUV [Y plane followed by U and V planes], use with VideoReader, can only be used with VideoWriter. |
NV_AYUV | Nvidia Buffer Format - 8 bit Packed A8Y8U8V8. This is a word-ordered format where a pixel is represented by a 32-bit word with V in the lowest 8 bits, U in the next 8 bits, Y in the 8 bits after that and A in the highest 8 bits, can only be used with VideoWriter. |
#include <opencv2/cudacodec.hpp>
Deinterlacing mode used by decoder.
Weave | Weave both fields (no deinterlacing). For progressive content and for content that doesn't need deinterlacing. |
Bob | Drop one field. |
Adaptive | Adaptive deinterlacing needs more video memory than other deinterlacing modes. |
Enumerator | |
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Weave | |
Bob | |
Adaptive |
#include <opencv2/cudacodec.hpp>
Multi Pass Encoding.
#include <opencv2/cudacodec.hpp>
Rate Control Modes.
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ENC_PARAMS_RC_CONSTQP | Constant QP mode. |
ENC_PARAMS_RC_VBR | Variable bitrate mode. |
ENC_PARAMS_RC_CBR | Constant bitrate mode. |
#include <opencv2/cudacodec.hpp>
Nvidia Encoding Presets. Performance degrades and quality improves as we move from P1 to P7.
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ENC_PRESET_P1 | |
ENC_PRESET_P2 | |
ENC_PRESET_P3 | |
ENC_PRESET_P4 | |
ENC_PRESET_P5 | |
ENC_PRESET_P6 | |
ENC_PRESET_P7 |
#include <opencv2/cudacodec.hpp>
Supported Encoder Profiles.
#include <opencv2/cudacodec.hpp>
Tuning information.
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#include <opencv2/cudacodec.hpp>
cv::cudacodec::VideoReader generic properties identifier.
Enumerator | |
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PROP_DECODED_FRAME_IDX | Index for retrieving the decoded frame using retrieve(). |
PROP_EXTRA_DATA_INDEX | Index for retrieving the extra data associated with a video source using retrieve(). |
PROP_RAW_PACKAGES_BASE_INDEX | Base index for retrieving raw encoded data using retrieve(). |
PROP_NUMBER_OF_RAW_PACKAGES_SINCE_LAST_GRAB | Number of raw packages recieved since the last call to grab(). |
PROP_RAW_MODE | Status of raw mode. |
PROP_LRF_HAS_KEY_FRAME | FFmpeg source only - Indicates whether the Last Raw Frame (LRF), output from VideoReader::retrieve() when VideoReader is initialized in raw mode, contains encoded data for a key frame. |
PROP_COLOR_FORMAT | Set the ColorFormat of the decoded frame. This can be changed before every call to nextFrame() and retrieve(). |
PROP_UDP_SOURCE | Status of VideoReaderInitParams::udpSource initialization. |
PROP_ALLOW_FRAME_DROP | Status of VideoReaderInitParams::allowFrameDrop initialization. |
Ptr< VideoReader > cv::cudacodec::createVideoReader | ( | const Ptr< RawVideoSource > & | source, |
const VideoReaderInitParams | params = VideoReaderInitParams() |
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#include <opencv2/cudacodec.hpp>
This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts.
source | RAW video source implemented by user. |
params | Initializaton parameters. See cv::cudacodec::VideoReaderInitParams. |
Ptr< VideoReader > cv::cudacodec::createVideoReader | ( | const String & | filename, |
const std::vector< int > & | sourceParams = {} , |
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const VideoReaderInitParams | params = VideoReaderInitParams() |
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#include <opencv2/cudacodec.hpp>
Creates video reader.
filename | Name of the input video file. |
sourceParams | 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 | Initializaton parameters. See cv::cudacodec::VideoReaderInitParams. |
FFMPEG is used to read videos. User can implement own demultiplexing with cudacodec::RawVideoSource
Ptr< cudacodec::VideoWriter > cv::cudacodec::createVideoWriter | ( | const String & | fileName, |
const Size | frameSize, | ||
const Codec | codec, | ||
const double | fps, | ||
const ColorFormat | colorFormat, | ||
const EncoderParams & | params, | ||
Ptr< EncoderCallback > | encoderCallback = 0 , |
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const cuda::Stream & | stream = cuda::Stream::Null() |
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#include <opencv2/cudacodec.hpp>
Creates video writer.
fileName | Name of the output video file. |
frameSize | Size of the input video frames. |
codec | Supports Codec::H264 and Codec::HEVC. |
fps | Framerate of the created video stream. |
colorFormat | OpenCv color format of the frames to be encoded. |
params | Additional encoding parameters. |
encoderCallback | Callbacks for video encoder. See cudacodec::EncoderCallback. Required for working with the encoded video stream. |
stream | Stream for frame pre-processing. |
Ptr< cudacodec::VideoWriter > cv::cudacodec::createVideoWriter | ( | const String & | fileName, |
const Size | frameSize, | ||
const Codec | codec = Codec::H264 , |
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const double | fps = 25.0 , |
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const ColorFormat | colorFormat = ColorFormat::BGR , |
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Ptr< EncoderCallback > | encoderCallback = 0 , |
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const cuda::Stream & | stream = cuda::Stream::Null() |
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#include <opencv2/cudacodec.hpp>
Creates video writer.
fileName | Name of the output video file. |
frameSize | Size of the input video frames. |
codec | Supports Codec::H264 and Codec::HEVC. |
fps | Framerate of the created video stream. |
colorFormat | OpenCv color format of the frames to be encoded. |
encoderCallback | Callbacks for video encoder. See cudacodec::EncoderCallback. Required for working with the encoded video stream. |
stream | Stream for frame pre-processing. |
void cv::cudacodec::MapHist | ( | const cuda::GpuMat & | hist, |
Mat & | histFull | ||
) |
#include <opencv2/cudacodec.hpp>
Utility function demonstrating how to map the luma histogram when FormatInfo::videoFullRangeFlag == false.
hist | Luma histogram hist returned from VideoReader::nextFrame(GpuMat& frame, GpuMat& hist, Stream& stream). |
histFull | Host histogram equivelent to downloading hist after calling cuda::calcHist(InputArray frame, OutputArray hist, Stream& stream). |
bool cv::cudacodec::operator== | ( | const EncoderParams & | lhs, |
const EncoderParams & | rhs | ||
) |
#include <opencv2/cudacodec.hpp>