I want to create a GUI application which will access the local webcam and provide a feature of taking the snapshot from the stream . I want to develop this application using C/python . can anyone tell me how can I access my local webcam.
You can use OpenCV which has Python bindings to capture webcam streams.
You can try VideoCapture, it is "A Win32 Python Extension for Accessing Video Devices".
In Linux, you can use v4l2 by which you can get the full control of your webcam.
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I am trying to use my iPhone camera with OpenCV. However, Python doesn't recognize the camera.
Some months ago I did it simply writing:
cap = cv2.VideoCapture(1)
Does anyone know how to solve this?
I know that there are other solutions like using IP address to use the camera with OpenCV, but I want to use the camera via USB.
As of now, your way of accessing the camera of your iPhone is not supported by OpenCV, but there are other ways to implement OpenCV on iOS.
OpenCV Documentation tells you to
add a camera controller to the view controller and initialize it when the view has loaded.
This is done using an XCode project utilizing the OpenCV Framework, more information can be found here: OpenCV iOS - Video Processing.
My goal is to create a RTSP server using OpenCV Python using the GStreamer backend.
I have RGB images stored as OpenCV Mat, and I would like to create a VideoWriter which can write to a RTSP sink. The output video must be x264 encoded.
I believe this can be easily achieved using a GStreamer pipeline and providing the pipeline arguments to the VideoWriter constructor and then later pushing frames to the VideoWriter, but the issue is I have no experience working with GStreamer and I find it very confusing.
The answers I have found on SO are incomplete, use specific hardware decoders (ex for NVIDIA Jetson), or are overly complex. I'd like to find a more generic solution which works on CPU.
I have created a project something related to your requirement sometime ago. This could be a kickstarter and customize it based on your need. I'm attaching my github repository link below.
OpenCV RTSP Server
Any issues related to the project can be raised in the github itself and doubts can be cleared here.
SimpleRTSPServer, Not in Python but very simple to run and use. Start the server in another terminal and write your outputs to there. The server easy to configure as well. You can capture read frames easily from another Python script or VLC.
I'm trying to access my laptop's built-in infrared webcam (intended for windows hello) in a python project. I can access the normal RGB camera quite easily using the VideoCapture class from OpenCV, however can't find a way to access the infrared camera. I tried passing different indices to the VideoCapture class, however only "0" works, which is the normal webcam.
There are ways to do this using the Windows API, however I can't find a way to access this in Python.
Some people have been able to access the windows hello camera on Ubuntu using fswebcam.
Is there anyway to access the infrared camera using python? Maybe some way of interfacing with the Windows API using pywin32? Any help getting started with this would be appreciated. Alternatively, is there anything similar to fswebcam for Windows that would let me do the same?
That example you provided, doesn't seem to use the win32 api, but rather the dotnet framework, specifically the Windows.Media.Capture.Frames.MediaFrameSourceGroup class.
It looks like you'll be able to access the dotnet framework using http://pythonnet.github.io/ . After that it should be a case of porting that C# code over to Python.
You need to access WinRT API, not Win32 API.
Use this library: https://github.com/Microsoft/xlang/tree/master/src/package/pywinrt/projection and you should be able to call invoke necessary parts in WinRT from the code you posted.
I am trying to read the stream from HDMI-USB video-capture card using opencv. But OpenCV doesn't seem to support that functionality. I used opencv to read RTSP streams and webcams. Can anyone suggest a way here. Currently I am accessing the stream using OBS Studio software. Is there any other module in python that I can use. Thanks in advance.
There's a similar question here. But that approach doesn't work for me.
Edit:
video0 or video1 depends on your system and connected devices.
Turns out we can access this USB device using opencv itself.
In linux you can access these devices at /dev/video0.
import cv2
cap = cv2.VideoCapture('/dev/video0')
I'm yet to figure out how to do this in windows though
I am creating a web application that makes animation from frames. I use opencv and VideoWriter to implement it. But there is a problem. I want to host my application on Google App Engine, so I cannot save files on it. Is it possible to output the VideoWriter video to Google Cloud Store directly, without saving it on the machine, or I must find other library to implement it?
Generally speaking, streaming transfers are supported by Cloud Storage for other languages, but for Python, or Ruby. OpenCV has C++, Python, Java and MATLAB interfaces and supports Windows, Linux, Android and Mac OS. In other words, if you don't plan to use the Python, or Ruby library version, your setup should work.