Opening android front camera

[Gaurav Bhoi]

Hey guys, I m making a camera application for android so how can I toggle between front and rear camera. please help me thank you

[Degenerate Tech]

Watch this video .

https://youtu.be/QWShS_BnQjQ

[Gaurav Bhoi]

I followed the instructions correctly but i still got some errors please help thank you. I m trying to start front camera

python code:

from kivy.app import App
from kivy.uix.boxlayout import BoxLayout
from kivy.graphics.texture import Texture
from kivy.uix.camera import Camera
import numpy as np
import cv2
from kivy.properties import ObjectProperty
from jnius import autoclass
from android.permissions import request_permissions, Permission

camerax = autoclass('android.hardware.Camera')
CameraInfo = autoclass('android.hardware.Camera$CameraInfo')

class AndroidCamera(Camera):
    camera_resolution = (1280, 720)
    index = CameraInfo.CAMERA_FACING_FRONT

    def _camera_loaded(self, *largs):
        self.texture = Texture.create(size=np.flip(self.camera_resolution), colorfmt='rgb')
        self.texture_size = list(self.texture.size)

    def on_tex(self, *l):
        if self._camera._buffer is None:
            return None
        frame = self.frame_from_buf()

        self.frame_to_screen(frame)
        super(AndroidCamera, self).on_tex(*l)

    def frame_from_buf(self):
        w, h = self.resolution
        frame = np.frombuffer(self._camera._buffer.tostring(), 'uint8').reshape((h + h // 2, w))
        frame_bgr = cv2.cvtColor(frame, 93)
        return np.rot90(frame_bgr, 3)

    def frame_to_screen(self, frame):
        frame_rgb = cv2.cvtColor(frame, cv2.COLOR_BGR2RGB)
        flipped = np.flip(frame_rgb, 0)
        print(flipped)
        buf = flipped.tostring()
        self.texture.blit_buffer(buf, colorfmt='rgb', bufferfmt='ubyte')

class Box(BoxLayout):
    pass

class MainApp(App):
    def build(self):
        request_permissions([Permission.CAMERA])
        return Box()


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

kv code:

<Box>:
    orientation: 'vertical'
    size: root.width, root.height

    AndroidCamera:
        resolution: self.camera_resolution
        allow_stretch: True
        play: True

        canvas.before:
            PushMatrix
            Rotate:
                angle: 180
                origin: self.center

        canvas.after:
            PopMatrix

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[Degenerate Tech]

upload the logs in file

[Gaurav Bhoi]

I m attaching log file down below as well as spec file

To view this discussion on the web visit https://groups.google.com/d/msgid/kivy-users/524e8702-5ad2-4408-9ef1-fdc952b1f24bn%40googlegroups.com.

[Gaurav Bhoi]

guys i need some guidance should i upload all related files and codes. please help me