Source code for

from typing import List
from pathlib import Path
import os
import pyfakewebcam
import cv2

from auto_everything.base import Terminal
t = Terminal(debug=True)

[docs]class FakeCamera(): """ This module based on `pyfakewebcam`. """ def __init__(self, device: str = None, width: int = 640, height: int = 480): list_command = "v4l2-ctl --list-devices" list_devices = t.run_command(list_command) assert "not found" not in list_devices, f"{list_devices}\n\nv4l2-ctl not found, you may have to install it with 'sudo apt install v4l2loopback-utils'" assert "v4l2loopback" in list_devices, f"{list_devices}\n\nTo create a fake camera, you have to add a dummy device first by 'sudo modprobe v4l2loopback'" lines = list_devices.split("\n") the_device = None for index, line in enumerate(lines): if index < len(lines)-1: if ("v4l2loopback" in line) and "/dev/video" in lines[index+1]: the_device = lines[index+1].strip() if device == None: assert the_device != None, f"{list_devices}\n\ncan't auto find the dummy device, you may have to specify it manullay: FakeCamera('/dev/video*')" self.device = the_device else: self.device = device = pyfakewebcam.FakeWebcam(self.device, width, height)
[docs] def next(self, frame, rgb=False): """ Pipe new frame to the fake camera Parameters ---------- frame: numpy representation of an image np.zeros((480,640,3), dtype=np.uint8) rgb: bool if you want to give me an rgb frame, you'll have to set this. """ if rgb: frame = cv2.cvtColor(frame, cv2.COLOR_RGB2BGR)
[docs] def show(self): """ Show the fake camera by using ffplay Parameters ---------- """"ffplay {self.device}")
if __name__ == "__main__": from pprint import pprint fakecam = FakeCamera()