OpenCV 4 Building with CMake & Visual Studio 2017 Setup

[@Osmanity]

I love opencv, very clearly explained with awsome topics as always.I hope more people gets to your channel becasue you are awome!

[@muhammadadeel1150]

Ibrahim Osman May I have your email address? I need some help

[@qqaadir]

Great, cheers for showing in-depth mechanism for the most frustrating process.

[@Luna6537er]

THANK YOU SO MUCH EVEN FROM 2021.. I HAVE BEEN TRYING THIS SINCE YESTERDAY AND I FOUND YOUR VIDEO. THANKS!!!

[@Jayomarrios]

Thanks for the playlist.. I enjoyed all of the videos.

[@adison024]

Good video and helped a lot. I do have a suggestion if you are open to them. Can you please zoom in and show us the only things that you are typing or working? You don't need to show the whole monitor at all time, Can't even see what you are typing or clicking instead I watch the video in 1080p on fullscreen. Most people who are watching these videos are doing the things side by side. And if they don't have a second screen, that means a lot of times going out of full screen alt tab go to full screen again and what not. Just something that will make your viewer's experience a bit simple. Apart from this, the content was extremely helpful. Thank You!

[@GeorgeLecakes]

Thanks for the suggestions.; Would you happen to know any applications which automatically does that? Otherwise it would be a lot of editing on my part.

[@adison024]

@@GeorgeLecakes No, i don't know a software/app that may help you out with it. But there are two things i can think of. Problem is, it may not look good. 1) Use inbuilt app called magnifier. 2) Record the videos after setting your screen resolution to 1280x720. You or your viewer may not like it. IMO, your coding content can be delivered via a 720p video. This video for example is not a gaming video that need 4k resolution. And on the downside, 4k video are clear only when we see them on 4k screen. Anything below 1080 is blurry. Thank you for reading my suggestion. Please note that despite these hurdle that i face on your channel, I've got mad respect for you. Love you OpenCV series. Edit: I'm not sure about your video recording technique. If you are okay with clip after clip and merge them together later... 3) the ShareX app, free on steam, can help you record particular windows open at the moment. Don't have much experience with it, but worth a try.

[@GeorgeLecakes]

@@adison024 Live the constructive criticism. Glad you enjoyed the videos. Unfortunately my job is in the world of 3d graphics and my home setup has 3x 4k monitors. I'm just used to working that way. If I do any more opencv I'll think about resolution and what is best for the viewer. Thanks again.

[@DECHERT-SYSTEMS]

Thanks

[@GeorgeLecakes]

No problem

[@muhammadadeel1150]

Your teaching method is very good

[@EneaDanger]

Thank you for the great tutorial! Could you make some videos on OpenCV with CUDA enabled since there's almost no beginner friendly information out there.

[@GeorgeLecakes]

Good idea, I'll look into it

[@john3932]

TRULY excellent - thank you!

[@simonchin79]

Thanks for the video, great help on your guide...

[@lcd11001]

thank you! You saved my time

[@Jaulo]

Hi, i built sources from opencv 4 for staticlib opencvworld410 but in my project i get one error: LNK2001 unresolved external symbol ___libm_sse2_sincos_ How can i solve this? Thanks I've found nothing on internet.

[@rockywoodfilms3934]

I am on visual studio communities 2019 and followed your instructions all the way to configure part and got this error cmake-gui error in configuration process project files may be invalid

[@rahmatabadi3839]

7:05 adding %OPENCV_DIR%\lib does not make sense. Why did you need to register lib in path?

[@JakubMareda]

Is there a way to set it without using absolute paths or env variables? I'd like to make project like this, but made so that it's portable and can be included as a dependency project in MSVC solution. When you do it like that in MSVC, it handles the libs for you as long as you add the project you added to refferences.

[@shikharchaudhary6984]

thank you for this video

[@elw2020]

Excellent tutorial! Thank you!

[@OmgThatsIncredible]

Hi! Im having an issue with the release of both the ALL_BUILD and INSTALL from min 4:00. On the compilation of both releases, I get multiple "fatal error LNK1181" which apparently means that there is a problem with the path indicated on project properties. I dont know how to fix this however. Any advice?

[@dev___2283]

Sir When you hit the configure button it started configuring and after getting one error it still goes on configuring and after that it show "Configuring Done".....But when i did it It gives "Configuring incomplete error occured!" !? What info should i give you so you could help me in this problem....

[@melmels1337]

Thank you! can you give us another tutorial to link opencv with cuda on visual studio?

[@GeorgeLecakes]

Yeah, I'd like to do that, but I tried several times with it failing miserably. Until I can get it to work no tutorial.

[@melmels1337]

@@GeorgeLecakes i did build without error with cuda but when im running a code it gave me missing opencvxxx.dll

[@GeorgeLecakes]

@@melmels1337 yeah that's around where I got as well. Could build but never get it to work in visual studio

[@helloankur2009]

how can detect face by using opencv and cuda?

[@muhammadadeel1150]

Could you please make some video of using ZED stereo vision camera, Visual studio 2017 ,C++, OpenCV 4 , CMake, CUDA NVIDIA and Qt 5

[@HeihachiMishimaZaibatsu]

Thank you very much, sir!

[@nicholaskuo6863]

thank for your video , it's very useful!!

[@expanzo]

if you have problems with CMake try in CMake3.15.2 --> OpenCV 4 Where is the source code: YOUR PATH /opencv/sources its work for me :)

[@TheExcale]

Thanks for your tutorial, again :) Great work, keep it up. I got one question that is mocking me, Since I submitted my thesis, because including each and every lib-file i needed manually was quite annoying (about 40+ with debug and release -.-'), especially when running into some mistakes where i had to do them all again. Is the "opencv_world- file" still unavailable to build with Cmake (with openCV4)? Cause it seemed to be in earlier opencv build versions like 3.3.0. Its not that i'm in need to have just one file, but im interested if its feasible with a) all standard libraries from the master_repository. b) all standard libraries including the contrib library. If not, is there any plausible reason why you shouldn't be allowed to do stuff like packing multiple files into one file? Thanks if anyone knows an answer to this :)

[@emad3241]

i built it with cuda suport and the modules size is 30gb+ i don't understand

[@GeorgeLecakes]

You probably supported too many architectures in your setup. Look up limiting them to reduce size.

[@essamzaky6800]

good tutorial , would you , build OpenCv with enbale Tesseract ,

[@GeorgeLecakes]

Good suggestion.

[@effsun2]

Thank a lot!!!

[@williambehrens1235]

Could one of the next in this series (if you're still doing it) be about more morphological operations or about thresh holding?

[@GeorgeLecakes]

Had started to or erosion and dilation. But not as much interest. kzbin.info/www/bejne/e5Cxg4yuf96Nosk

[@charlieli7486]

Thank you for the great tutorial! By the way, are you going to include tutorials on arcuo markers in this series?

[@gaiabravo]

already did

[@truongphamquang3932]

thank you very much!~

[@davidetonelli944]

Could you do a tutorial in which you show how to capture the video of the screen?

[@GeorgeLecakes]

What do you mean, like how I make videos or how to capture video from something else?

[@davidetonelli944]

@@GeorgeLecakes Sorry for my english. I am trying to do a bot for aimbooster to learn opencv, but I don't know how to make the program "see" the desktop.

[@davidetonelli944]

Any suggestions?

[@N1nja09]

@@davidetonelli944 Fraps maybe :p

[@rickbinas6995]

What is the purpose of using Cmake? I can still run it directly on my computer without it like some tutorials show it.

[@GeorgeLecakes]

Building it directly allows us to use additional libraries and activate features not in the builds normally provided.

[@rickbinas6995]

Thanks

[@mohammadnouri3958]

its very good but i need xfeatures.lib tnx help me

[@GeorgeLecakes]

arco. Yhey are standard features just include them in the build. If not see my videos on aruco to built non standard builds.

[@mohammadnouri3958]

​@@GeorgeLecakes Tnx I Found Solution

[@encryptal]

FINNALY YESS ONE SUB from MEE

[@GurpreetKakar4873]

vcpkg makes this so much easier now. You can install all Opencv with just single command.

[@aaaron19]

can you explain?

[@kevinsalvadoraguilardoming5082]

i dont know, in my computer dont work., but good tutorial

[@GeorgeLecakes]

If you get specific errors, feel free to post on here and I or someone else will comment.

[@PumpiPie]

[@geoffreyv676]

Problem with this tuto : You use Cmake to build openCV but you dont use CMake in your own project in order to import openCV libs.

[@GeorgeLecakes]

Correct, I import the libraries inside of visual studio. It still works.

[@BOHICAMAN1]

Apparently your VS 2017 and my VS 2017 Community are different. Followed your guide exactly and got ========== Build: 0 succeeded, 291 failed, 3 up-to-date, 0 skipped ==========. following pages and pages of errors! ???

[@GeorgeLecakes]

You need to read either the first few or last few and fix what it says is wrong.

[@BOHICAMAN1]

@@GeorgeLecakes Ok, I'll try it in a little while. Thanks!!

[@GeorgeLecakes]

@@BOHICAMAN1 sorry I cant be more helpful but the cause of these issues is usually either in the first few lines or last few lines. If you isolate what is going wrong you can google that package or error specifically and get better help to fix your specific issue.

[@BOHICAMAN1]

@@GeorgeLecakes Will do! Thanks again for info! Great video too! Bob

[@user-xz9st8hm1n]

so much compressor.

[@GeorgeLecakes]

Audio or video? Was shot at 4k for video and the audio was in Adobe Audition separate from the video. Were you watching at max quality or letting youtube lower it?

[@jason-ps6mf]

The background music is horrible

[@gabrielfernandessegurofilh6368]

lol... in Fedora Linux you just need add a *`pkg-config --cflags --libs opencv`* to your projects with any tool. *Windows IS SO STUPID*.

[@GeorgeLecakes]

Until you have to teach a classroom of students who barely know things beyond basic button clicks on a Mac to enter commands like that. They everything becomes equally difficult... :-(

[@corriedotdev]

thanks - if anyone misses opencv world .dll it wasnt checked by default for me in latest build 12/09/2022