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.
I know that video streaming is possible with python using flask framework. But as twilio is a paid platform, is there any other platforms which can be freely used for video streaming.
You can check out this blog written by miguel to develop a video steaming platform using flask.
https://blog.miguelgrinberg.com/post/video-streaming-with-flask
The theory is explained pretty well here and i personally recommend it.
If you want to some recognition or CV stuff you can also checkout tutorial by PyImageSearch.
https://www.pyimagesearch.com/2019/09/02/opencv-stream-video-to-web-browser-html-page/
I think this tutorial is more relevant for you but if you are new to python you may find this a bit overwhelming.
My python application need to import photos from iPhone/Android and copy it to local hard disk. This is Windows application and need to use Windows auto play handler and COM. I have seen some example that implement it using c# language (link is here) but I don't know how to do this using Python.
Further Googling tells python has comtypes library to use COM on windows platform but I do not find any detail documentation on how to get it done.
I have heard of pygame (for games and reading from webcam) in python. And also gstreamer for media in python. Is there any python library that one can use for fingerprint reading and recognition.