VideoCapture | : camera : V4L2OpenCV3.1以MPJG格式采集图像 | Camera library

 by   Jack-Cherish C++ Version: Current License: No License

kandi X-RAY | VideoCapture Summary

kandi X-RAY | VideoCapture Summary

VideoCapture is a C++ library typically used in Video, Camera, OpenCV applications. VideoCapture has no bugs, it has no vulnerabilities and it has low support. You can download it from GitHub.

:camera:V4L2+OpenCV3.1以MPJG格式采集图像
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            kandi-support Support

              VideoCapture has a low active ecosystem.
              It has 55 star(s) with 39 fork(s). There are 5 watchers for this library.
              OutlinedDot
              It had no major release in the last 6 months.
              There are 0 open issues and 1 have been closed. On average issues are closed in 7 days. There are no pull requests.
              It has a neutral sentiment in the developer community.
              The latest version of VideoCapture is current.

            kandi-Quality Quality

              VideoCapture has 0 bugs and 0 code smells.

            kandi-Security Security

              VideoCapture has no vulnerabilities reported, and its dependent libraries have no vulnerabilities reported.
              VideoCapture code analysis shows 0 unresolved vulnerabilities.
              There are 0 security hotspots that need review.

            kandi-License License

              VideoCapture does not have a standard license declared.
              Check the repository for any license declaration and review the terms closely.
              OutlinedDot
              Without a license, all rights are reserved, and you cannot use the library in your applications.

            kandi-Reuse Reuse

              VideoCapture releases are not available. You will need to build from source code and install.

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            VideoCapture Key Features

            No Key Features are available at this moment for VideoCapture.

            VideoCapture Examples and Code Snippets

            No Code Snippets are available at this moment for VideoCapture.

            Community Discussions

            QUESTION

            AttributeError: module 'mediapipe.python.solutions.holistic' has no attribute 'FACE_CONNECTIONS'
            Asked 2022-Mar-23 at 18:26

            need help this is my code:

            ...

            ANSWER

            Answered 2021-Sep-08 at 15:12

            I just looked into the sourcecode at https://github.com/google/mediapipe/blob/master/mediapipe/python/solutions/holistic.py

            FACE_CONNECTIONS seems to be renamed/replaced by FACEMESH_TESSELATION.

            Just changing that name in the code should work.

            PS: If you want just the outlines of the face, it's now FACEMESH_CONTOURS

            Source https://stackoverflow.com/questions/69095372

            QUESTION

            Python window doesn't close after video ended
            Asked 2022-Feb-26 at 13:41

            I'm currently making a code that will do various things such as controlling motors etc but at one point I need to code to popup a video on vlc and exit the window when the video ended, the problem is that the window currently stays after the video ended and the whole code just freezes and I can't do anything past the video

            I tried various things such as calculating the video length and call a self.close() when the timer hit but still the same thing

            I also tried adding "--play-and-exit" to the vlc parameters but it still won't budge...

            Here's the code if someone knows how to do it properly !

            ...

            ANSWER

            Answered 2022-Feb-26 at 13:41

            I have found the solution. This is the new main loop:

            Source https://stackoverflow.com/questions/71275864

            QUESTION

            OpenCVsharp4 save Image at max resolution
            Asked 2022-Jan-21 at 09:23

            I am using Opencvsharp from shimat for building an application. Code simply opens camera, saves the image and close it using below code.

            ...

            ANSWER

            Answered 2022-Jan-21 at 09:23

            When capturing via OpenCvSharp, 640x480 is the default resolution.

            You must set the desired resolution before the device is opened (which is done implicitly when you grab frames) e.g.:

            Source https://stackoverflow.com/questions/70640098

            QUESTION

            How to print every x seconds while rest of code runs without being stopped?
            Asked 2022-Jan-01 at 01:54

            I've seen ways of using the time.sleep() function, however that stops the rest of the code from running.

            I'm making a hand recognition script and want the video output to be hindered by a certain value being printed every second.

            This is my code:

            ...

            ANSWER

            Answered 2021-Dec-31 at 17:21

            One way is to use time.time to measure how much time has passed (will print 'hi' every 5 seconds or so, this is less precise because if some part of the loop takes more time, it may print later than expected):

            Source https://stackoverflow.com/questions/70544320

            QUESTION

            Combining Object Detection with Text to Speech Code
            Asked 2021-Dec-28 at 16:46

            I am trying to write an object detection + text-to-speech code to detect objects and produce a voice output on the raspberry pi 4. However, as of right now, I am trying to write a simple python script that incorporates both elements into a single .py file and preferably as a function. I will then run this script on the raspberry pi. I want to give credit to Murtaza's Workshop "Object Detection OpenCV Python | Easy and Fast (2020)" and https://pypi.org/project/pyttsx3/ for the Text to speech documentation for pyttsx3. I have attached the code below. I have tried running the program and I always keep getting errors with the Text to speech code (commented lines 33-36 for reference). I believe it is some looping error but I just can't seem to get the program to run continuously. For instance, if I run the code without the TTS part, it works fine. Otherwise, it runs for perhaps 3-5 seconds and suddenly stops. I am a beginner but highly passionate in computer vision, and any help is appreciated!

            ...

            ANSWER

            Answered 2021-Dec-28 at 16:46

            I installed pyttsx3 using the two commands in the terminal on the Raspberry Pi:

            1. sudo apt update && sudo apt install espeak ffmpeg libespeak1
            2. pip install pyttsx3

            I followed the video youtube.com/watch?v=AWhDDl-7Iis&ab_channel=AiPhile to install pyttsx3. My functional code should also be listed above. My question should be resolved but hopefully useful to anyone looking to write a similar program. I have made minor tweaks to my code.

            Source https://stackoverflow.com/questions/70129247

            QUESTION

            Conversion from BGR to YUYV with OpenCV Python
            Asked 2021-Dec-27 at 16:07

            I have been trying to convert a BGR captured frame into the YUYV format.

            In OpenCV Python I can do convert YUYV into BGR with COLOR_YUV2BGR_YUY2 conversion code but I cannot do the reverse of this operation (there is no conversion code for this operation, I have tried COLOR_BGR2YUV but it is not converting correctly). I am curious about how to convert 3-channel BGR frame into the 2-channel YUYV frame.

            Here you can see the code that I am using to change camera mode to capture YUYV and converting it into BGR, I am looking for the replacement of the cap.set(cv2.CAP_PROP_CONVERT_RGB, 0) so I can capture BGR and convert it into YUYV without cap.set(cv2.CAP_PROP_CONVERT_RGB, 0) (Because it is an optional capture setting and Windows DirectShow ignores this flag)

            ...

            ANSWER

            Answered 2021-Dec-27 at 14:34

            You can use the following code to convert your image to YUV and after that create YUYV from YUV. In this example an image is given as input to the program:

            Source https://stackoverflow.com/questions/70496578

            QUESTION

            How to make mediapipe pose estimation faster (python)
            Asked 2021-Dec-20 at 16:11

            I'm making a pose estimation script for my game. However, it's working at 20-30 fps and not using the whole CPU even if there is no fps limit. It's not using whole GPU too. Can someone help me?

            Here is resource usage while playing a dance video: https://imgur.com/a/6yI2TWg

            Here is my code:

            ...

            ANSWER

            Answered 2021-Dec-20 at 16:11

            Set the model_complexity of mp.Pose to 0.

            As the documentation states:

            MODEL_COMPLEXITY Complexity of the pose landmark model: 0, 1 or 2. Landmark accuracy as well as inference latency generally go up with the model complexity. Default to 1.

            This is the best solution I've found, also use this.

            Source https://stackoverflow.com/questions/68745309

            QUESTION

            Tensorflow: ValueError: Input 0 is incompatible with layer model: expected shape=(None, 99), found shape=(None, 3)
            Asked 2021-Nov-29 at 14:36

            I am trying to predict with a ANN classification model made in Tensorflow to classify pose keypoints with MediaPipe. The mediapipe pose tracker has 33 keypoints for x y and z coordinates for a total of 99 data points.

            I am training for 4 classes.

            This is running the pose embedding

            ...

            ANSWER

            Answered 2021-Nov-17 at 08:30

            Maybe try changing the shape of pose_landmarks from (33, 3) to (1, 99) after your assertion and before you make a prediction:

            Source https://stackoverflow.com/questions/69997327

            QUESTION

            Generate individual H5 files for each and every video
            Asked 2021-Oct-26 at 06:05

            My code is about to create an H5 file for Each and Every video in the folder, Extracting the feature from the video and stored into the H5 file.

            in Below shown code extraction feature from multi videos and all the features are stored in the single H5 file

            H5 file order:

            ...

            ANSWER

            Answered 2021-Oct-26 at 06:05

            You need to :

            1. remove self.h5_file = h5py.File(save_path, 'w') from __init__()
            2. remove self.h5_file.create_group('video_{}'.format(idx+1)) from _set_video_list()
            3. remove gen.h5_file.close() from main()
            4. change last block of generate_dataset() into something like:

            .

            Source https://stackoverflow.com/questions/69611677

            QUESTION

            Cmake: How to link multiple libraries?
            Asked 2021-Oct-21 at 18:59

            I am using CMake to define the compilation of a C++ executable. The goal is to use 2 third-party libraries, Open3D and OpenCV. I am able to include one of the two with target_link_libraries, but including both results in OpenCV functions not being found.

            This is my current CMakeLists.txt

            ...

            ANSWER

            Answered 2021-Oct-21 at 18:59

            The problem was solved by finding this Github issue: https://github.com/isl-org/Open3D/issues/2286
            By using specific build flags when building Open3D, the libraries could both be linked correctly and simultaneously with the target_link_libraries(ORB_SLAM ${OpenCV_LIBS} ${Open3D_LIBRARIES}) command.

            The build commands were as follows;

            Source https://stackoverflow.com/questions/69623544

            Community Discussions, Code Snippets contain sources that include Stack Exchange Network

            Vulnerabilities

            No vulnerabilities reported

            Install VideoCapture

            You can download it from GitHub.

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