mshabunin's profile - activity

Try VideoCapture cap("v4l2src device="/dev/video0" ! 'video/x-raw,format=UYVY, width=1920,height=1080' ! appsink", CAP_G

Looks like currently only BGR, Gray and JPEG formats are supported: https://github.com/opencv/opencv/blob/212f0fb5093ff8

Set PKG_CONFIG_PATH environment variable to the location of your custom FFmpeg .pc files. Don't forget to do clean build

You will need to add necessary pkg-config files and libraries manually. OpenCV can not generate correct .pc file in this

Could be a bug, could you please file an issue to the GitHub?

What is workdir of your script? Does saved_images folder exist there?

No, I mean mathematically, should it really be 1 for matching images? I can see, that algorithm searches for ECC maximum

Why do you expect 1.00?

G-API does not have interfaces do it directly, because it has different conception than traditional approach. Though you

Try appsink sync=false

While the issue is being fixed you can use "Donate" button on old page (https://opencv-infrastructure.github.io/opencv.o

It only needs Docker. Take a look at the README.md file in the repository root it describes installation steps.

Try to change your CPU optimization level and disable dispatching: -DCPU_BASELINE=SSE42 -DCPU_DISPATCH= cmake options.

If you wonn't declare any macro (e.g. CV_SSE2), default non-optimized implementation will be used: https://github.com/op

https://github.com/opencv/opencv/blob/master/modules/calib3d/src/stereosgbm.cpp Looks like runtime switch does not work

Not all optimized functions have runtime switches. You can disable optimizations completely during build -DCV_DISABLE_OP

The easiest way is to create OpenCV module. But you can also try to include intrin.hpp in your build (copy files if need

Writing multiple videos from webcam stream Hey Everyone, so I've been working on my senior project and it's meant to wri

Writing multiple videos from webcam stream Hey Everyone, so I've been working on my senior project and it's meant to wri

Writing multiple videos from webcam stream Hey Everyone, so I've been working on my senior project and it's meant to wri

Please post your code snippet. Try to check returned Mat type (m.channels(), m.depth()). Check returned values range wit

Looking for samples on how to crate a stitched image from a video hi, I was looking for samples on how to crate a stitc

There are several conda packages for opencv: https://anaconda.org/search?q=opencv The recipie is for this one: https://

Looks like opencv in conda has ffmpeg support but not on Windows: https://github.com/conda-forge/opencv-feedstock/blob/b

I've been able to get 4096x2160 and 3840x2160 at 30 FPS. Camera is connected via USB3. Though there are two black bars

Do other camera application work? Try gstreamer pipelines via gst-launch-1.0 app: gst-launch-1.0 v4l2src ! xvimagesink.

VideoCapture can use different backends underneath, most common on Linux are FFmpeg and GStreamer. In some cases GStream

Try to debug: set environment variable OPENCV_VIDEOIO_DEBUG=1 Try to lock backend: VideoWriter(filename, CAP_FFMPEG, ..

Try to use VideoCapture(0, cv.CAP_MSMF) constructor. I've tried this sample with modified constructor and cap.set(cv.CAP

VideoCapture does not have this feature: https://github.com/opencv/opencv/blob/64168fc20aa8a914cb5529f90ffac309854563b1/

OpenCV dnn module has Vulkan backend and there is MoltenVK project which implements Vulkan API via Metal.

As the comment says: In-source builds are forbidden You should create build directory on the same level as source direc

Black and white are achromatic colors (https://en.wikipedia.org/wiki/Grey). In HSV model they are represented with S=0 a

Black and white are achromatic colors (https://en.wikipedia.org/wiki/Grey). In HSV model they are represented with S=0 a

Looks like your OpenCV build was wrong, maybe it was not cross-compiled. You should check cmake output and verify compil

Looks like you need to write new conversion functions and use them instead: icvCvt_BGR2RGB_8u_C3R -> icvCvt_BGR2RGB_1

Why not use imencode? VideoCapture and VideoWriter do not support this configuration, you should use GStreamer directly.

If you mean DNN (deep learning) module - it supports only inference, so you'll still need to train your networks in othe

There is a comment: // TODO Add runtime configuration It is better to add support for reading these values from the env

uridecodebin uri=file:///home/root/big_buck_bunny.mp4 ! videoconvert ! appsink or filesrc location=big_buck_bunny.mp4 !

Yes, you can test and review existing PRs, verify and fix (build & test) CUDA algorithms on different platforms, wit

The thing is core team can not support so many modules in main repository, so we decided to move less popular (or useful

Please try to use more recent version, like 3.4.3

Unfortunately there is no mechanism of proposing fixes to the Wiki. I've applied your fix manually.

Maybe because it has too many restrictions: https://stackoverflow.com/questions/18527450/main-difference-between-opencl-

Yes the app has been removed. As time shows, the idea of redistributing libraries for Android via separate app seems to