使用OpenCV库结合kivy和python-for-android在android日志文件上播放视频

Question

[尝试使用OpenCV库和kivy和python-for-android播放视频

这是我的尝试：

import os

import cv2
from kivy.app import App
from kivy.clock import Clock
from kivy.graphics.texture import Texture
from kivy.uix.boxlayout import BoxLayout
from kivy.uix.button import Button
from kivy.uix.image import Image


class KivyCamera(Image):
    def __init__(self, capture=None, fps=0, **kwargs):
        super(KivyCamera, self).__init__(**kwargs)
        # self.capture = cv2.VideoCapture("/sdcard2/python-apk/2.mp4")
        print "file path exist :" + str(os.path.exists("/sdcard2/python-apk/1.mkv"))
        self.capture = cv2.VideoCapture("/sdcard2/python-apk/1.mkv")
        Clock.schedule_interval(self.update, 1.0 / fps)

    def update(self, dt):
        ret, frame = self.capture.read()
        print str(os.listdir('/sdcard2/'))
        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.my_camera = KivyCamera(fps=30)
        self.box = BoxLayout(orientation='vertical')
        btn1 = Button(text="Hello")
        self.box.add_widget(btn1)
        # l = Label(text=cv2.__version__, font_size=150)
        # self.box.add_widget(l)
        self.box.add_widget(self.my_camera)
        return self.box

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

    def on_pause(self):
        return True


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

和在bulldozer.spec文件中

# (list) Source files to include (let empty to include all the files)
source.include_exts = py,png,jpg,kv,atlas,zip,mp4



# (list) Application requirements
requirements = plyer,kivy,opencv,numpy,pyjnius,ffmpeg, sqlite3, openssl

我正在尝试使用OpenCV cv2.VideoCapture（）方法播放视频，上述程序可在桌面上正常运行，但是当我使用bulldozer构建APK并在Android手机上运行该应用程序时，我只会得到白屏。我尝试播放.mp4或.mkv格式，但是在两种情况下，我都会出现白屏。我在做什么错或我的错在哪里??

这是我的日志文件：

Log File

类似问题：

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Answer 1

我有同样的问题，它只显示白屏...有人解决了吗？！