CVPubSubs

A threaded PubSub OpenCV interfaceREADME.md. Webcam and video feeds to multiple windows is supported.

Installation

CVPubSubs is distributed on PyPI <https://pypi.org>_ as a universal wheel and is available on Linux/macOS and Windows and supports Python 2.7/3.5+ and PyPy.

$ pip install CVPubSubs

Usage

Video Editing and Publishing

Display your webcam

import cvpubsubs.webcam_pub as w

w.VideoHandlerThread().display()

Change Display Arguments

import cvpubsubs.webcam_pub as w

video_thread = w.VideoHandlerThread(video_source=0,
                                    callbacks = w.display_callbacks,
                                    request_size=(800, 600),
                                    high_speed = False,
                                    fps_limit = 8
                                    )

video_thread.display()

Run your own functions on the frames

import cvpubsubs.webcam_pub as w

def redden_frame_print_spam(frame, cam_id):
    frame[:, :, 0] = 0
    frame[:, :, 1] = 0
    print("Spam!")

w.VideoHandlerThread(callbacks=[redden_frame_print_spam] + w.display_callbacks).display()

Display a tensor

def tensor_from_image(frame, cam_id):
    ten = tensor_from_pytorch_or_tensorflow(frame)
    return ten

t = wp.VideoHandlerThread(video_source=cam, callbacks=[tensor_from_image] + wp.display_callbacks)

t.display()

Display multiple windows from one source

import cvpubsubs.webcam_pub as w
from cvpubsubs.window_sub import SubscriberWindows

def cam_handler(frame, cam_id):
    SubscriberWindows.set_global_frame_dict(cam_id, frame, frame)

t = w.VideoHandlerThread(0, [cam_handler],
                         request_size=(1280, 720),
                         high_speed=True,
                         fps_limit=240
                         )

t.start()

SubscriberWindows(window_names=['cammy', 'cammy2'],
                  video_sources=[str(0)]
                  ).loop()

t.join()

Display multiple windows from multiple sources

iport cvpubsubs.webcam_pub as w
from cvpubsubs.window_sub import SubscriberWindows

t1 = w.VideoHandlerThread(0)
t2 = w.VideoHandlerThread(1)

t1.start()
t2.start()

SubscriberWindows(window_names=['cammy', 'cammy2'],
                  video_sources=[0,1]
                  ).loop()

t1.join()
t1.join()

License

CVPubSubs is distributed under the terms of both

MIT License <https://choosealicense.com/licenses/mit>_
Apache License, Version 2.0 <https://choosealicense.com/licenses/apache-2.0>_

at your option.

2.7 KiB Raw Blame History