手机虚拟视频替换摄像头，虚拟摄像头手机版，安卓免root虚拟摄像头【python】

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这个实现包含四个主要模块：虚拟摄像头核心功能、视频源管理、视频特效处理和主应用界面。代码使用了Kivy框架构建界面，通过pyjnius访问Android原生API，实现了免root的虚拟摄像头功能。

from kivy.app import App
from kivy.uix.boxlayout import BoxLayout
from kivy.uix.button import Button
from kivy.uix.togglebutton import ToggleButton
from kivy.uix.image import Image
from kivy.graphics.texture import Texture
from kivy.clock import Clock
from virtual_camera import VirtualCamera
from video_source import VideoSource, SourceType
from effects import *

class VirtualCameraApp(App):
def build(self):
self.camera = VirtualCamera()
self.source = VideoSource(SourceType.GENERATED)
self.camera.virtual_source = self.source

    layout = BoxLayout(orientation='vertical')
    self.image = Image()
    layout.add_widget(self.image)

    btn_layout = BoxLayout(size_hint=(1, 0.2))
    self.start_btn = Button(text="Start")
    self.start_btn.bind(on_press=self.toggle_camera)
    btn_layout.add_widget(self.start_btn)

    effects = [
        ("Mirror", MirrorEffect()),
        ("Grayscale", GrayscaleEffect()),
        ("Blur", BlurEffect()),
        ("Edges", EdgeEffect()),
        ("Red", ColorOverlay((255, 0, 0)))
    ]

    for name, effect in effects:
        btn = ToggleButton(text=name)
        btn.bind(state=lambda instance, state, e=effect: 
                self.toggle_effect(e, state == 'down'))
        btn_layout.add_widget(btn)

    layout.add_widget(btn_layout)
    return layout

def toggle_camera(self, instance):
    if self.camera.running:
        self.camera.stop()
        self.start_btn.text = "Start"
        Clock.unschedule(self.update_frame)
    else:
        self.camera.start()
        self.start_btn.text = "Stop"
        Clock.schedule_interval(self.update_frame, 1.0/30.0)

def toggle_effect(self, effect, active):
    if active:
        self.camera.effects.append(effect)
    else:
        self.camera.effects.remove(effect)

def update_frame(self, dt):
    if self.camera.frame is not None:
        buf = self.camera.frame.tostring()
        texture = Texture.create(size=(self.camera.frame.shape[1], self.camera.frame.shape[0]), 
                               colorfmt='bgr')
        texture.blit_buffer(buf, colorfmt='bgr', bufferfmt='ubyte')
        self.image.texture = texture

if name == 'main':
VirtualCameraApp().run()

import cv2
import numpy as np

class VideoEffect:
def apply(self, frame):
raise NotImplementedError

class MirrorEffect(VideoEffect):
def apply(self, frame):
return cv2.flip(frame, 1)

class GrayscaleEffect(VideoEffect):
def apply(self, frame):
return cv2.cvtColor(frame, cv2.COLOR_BGR2GRAY)

class BlurEffect(VideoEffect):
def init(self, kernel_size=5):
self.kernel_size = kernel_size

def apply(self, frame):
    return cv2.GaussianBlur(frame, (self.kernel_size, self.kernel_size), 0)

class EdgeEffect(VideoEffect):
def apply(self, frame):
gray = cv2.cvtColor(frame, cv2.COLOR_BGR2GRAY)
edges = cv2.Canny(gray, 100, 200)
return cv2.cvtColor(edges, cv2.COLOR_GRAY2BGR)

class ColorOverlay(VideoEffect):
def init(self, color=(0, 0, 255), alpha=0.5):
self.color = np.array(color, dtype=np.uint8)
self.alpha = alpha

def apply(self, frame):
    overlay = np.full_like(frame, self.color)
    return cv2.addWeighted(frame, 1-self.alpha, overlay, self.alpha, 0)