Source

pygame / examples / camera.py

#!/usr/bin/env python

# 1. Basic image capturing and displaying using the camera module

import pygame
import pygame.camera
from pygame.locals import *


class VideoCapturePlayer(object):

    size = ( 640, 480 )
    def __init__(self, **argd):
        self.__dict__.update(**argd)
        super(VideoCapturePlayer, self).__init__(**argd)

        # create a display surface. standard pygame stuff
        self.display = pygame.display.set_mode( self.size, 0 )
        self.init_cams(0)

    def init_cams(self, which_cam_idx):

        # gets a list of available cameras.
        self.clist = pygame.camera.list_cameras()
        print (self.clist)

        if not self.clist:
            raise ValueError("Sorry, no cameras detected.")

        try:
            cam_id = self.clist[which_cam_idx]
        except IndexError:
            cam_id = self.clist[0]

        # creates the camera of the specified size and in RGB colorspace
        self.camera = pygame.camera.Camera(cam_id, self.size, "RGB")

        # starts the camera
        self.camera.start()

        self.clock = pygame.time.Clock()

        # create a surface to capture to.  for performance purposes, you want the
        # bit depth to be the same as that of the display surface.
        self.snapshot = pygame.surface.Surface(self.size, 0, self.display)

    def get_and_flip(self):
        # if you don't want to tie the framerate to the camera, you can check and
        # see if the camera has an image ready.  note that while this works
        # on most cameras, some will never return true.
        if 0 and self.camera.query_image():
            # capture an image

            self.snapshot = self.camera.get_image(self.snapshot)

        if 0:
            self.snapshot = self.camera.get_image(self.snapshot)
            #self.snapshot = self.camera.get_image()

            # blit it to the display surface.  simple!
            self.display.blit(self.snapshot, (0,0))
        else:
            self.snapshot = self.camera.get_image(self.display)
            #self.display.blit(self.snapshot, (0,0))


        pygame.display.flip()

    def main(self):
        going = True
        while going:
            events = pygame.event.get()
            for e in events:
                if e.type == QUIT or (e.type == KEYDOWN and e.key == K_ESCAPE):
                    going = False
                if e.type == KEYDOWN:
                    if e.key in range(K_0, K_0+10) :
                        self.init_cams(e.key - K_0)


            self.get_and_flip()
            self.clock.tick()
            print (self.clock.get_fps())

def main():
    pygame.init()
    pygame.camera.init()
    VideoCapturePlayer().main()
    pygame.quit()

if __name__ == '__main__':
    main()