在 kivy 中使用 opencv, cv2.videocapture with android - python for android

Question

我已经工作了几天，试图在 python-for-android 中使用 cv2.VideoCapture()。我正在使用带有 buildozer 的 kivy 为 android 构建 apk。这是我的代码

from kivy.app import App
from kivy.uix.image import Image
from kivy.clock import Clock
from kivy.graphics.texture import Texture
import cv2


class KivyCamera(Image):
    def __init__(self, capture, fps, **kwargs):
        super(KivyCamera, self).__init__(**kwargs)
        self.capture = capture
        Clock.schedule_interval(self.update, 1.0 / fps)

    def update(self, dt):
        print 'hello'
        ret, frame = self.capture.read()
        print frame
    if ret:
        # convert it to texture
        buf1 = cv2.flip(frame, 0)
        buf = buf1.tostring()
        image_texture = Texture.create(
            size=(frame.shape[1], frame.shape[0]), colorfmt='bgr')
        image_texture.blit_buffer(buf, colorfmt='bgr', bufferfmt='ubyte')
        # display image from the texture
        self.texture = image_texture


class CamApp(App):
    def build(self):
        self.capture = cv2.VideoCapture(1)
        self.my_camera = KivyCamera(capture=self.capture, fps=30)
        return self.my_camera

    def on_stop(self):
        #without this, app will not exit even if the window is closed
        self.capture.release()


if __name__ == '__main__':
    CamApp().run()

此代码完全在 PC 上运行并成功显示视频源，但如果我使用 buildozer 将其构建为 apk 文件，它会在应用程序启动后立即崩溃。有人可以帮我解决这个问题吗？？无论如何，如果有人这样做，请发表评论..

这是来自 android 设备的 logcat：

08-14 10:05:16.807 16826-16826/? A/DEBUG: backtrace:
08-14 10:05:16.807 16826-16826/? A/DEBUG:     #00 pc 00018b00    /system/lib/libc.so (strlen+71)
08-14 10:05:16.807 16826-16826/? A/DEBUG:     #01 pc 00505fc9  /data/data/org.test.myapp/files/app/lib/python2.7/site-packages/cv2.so
08-14 10:05:16.807 16826-16826/? A/DEBUG:     #02 pc 005069fb  /data/data/org.test.myapp/files/app/lib/python2.7/site-packages/cv2.so
08-14 10:05:16.807 16826-16826/? A/DEBUG:     #03 pc 00506e0d  /data/data/org.test.myapp/files/app/lib/python2.7/site-packages/cv2.so
08-14 10:05:16.807 16826-16826/? A/DEBUG:     #04 pc 0037a4fb  /data/data/org.test.myapp/files/app/lib/python2.7/site-packages/cv2.so
08-14 10:05:16.807 16826-16826/? A/DEBUG:     #05 pc 0037aa71  /data/data/org.test.myapp/files/app/lib/python2.7/site-packages/cv2.so
08-14 10:05:16.807 16826-16826/? A/DEBUG:     #06 pc 0037261d  /data/data/org.test.myapp/files/app/lib/python2.7/site-packages/cv2.so
08-14 10:05:16.807 16826-16826/? A/DEBUG:     #07 pc 0037291b  /data/data/org.test.myapp/files/app/lib/python2.7/site-packages/cv2.so
08-14 10:05:16.807 16826-16826/? A/DEBUG:     #08 pc 003729ff  /data/data/org.test.myapp/files/app/lib/python2.7/site-packages/cv2.so
08-14 10:05:16.807 16826-16826/? A/DEBUG:     #09 pc 0015cf2b  /data/data/org.test.myapp/files/app/lib/python2.7/site-packages/cv2.so
08-14 10:05:16.807 16826-16826/? A/DEBUG:     #10 pc 000603c5  /data/app/org.test.myapp-1/lib/arm/libpython2.7.so (PyCFunction_Call+144)