pygameでｊｐｇ画像を表示できません。

実行すると、真っ黒いウィンドウが一瞬表示されてすぐに消えるだけになってしまいます。
ファイルの置き場所等変えてもダメでした。
どこを修正すれば良いでしょうか？

エラーメッセージ
self._image_surf = pygame.image.load("20190809165300949.jpg").convert()
pygame.error: Unsupported image format```import pygame

コード```import pygame
import time

class Apple:
    x = 0
    y = 0
    step = 44

    def __init__(self,x,y):
        self.x = x * self.step
        self.y = y * self.step

    def draw(self, surface, image):
        surface.blit(image,(self.x, self.y))

class Player:
    x = [0]
    y = [0]
    step = 44
    direction = 0
    length = 3

    updateCountMax = 2
    updateCount = 0

    def __init__(self, length):
       self.length = length
       for i in range(0,2000):
           self.x.append(-100)
           self.y.append(-100)

       self.x[1] = 1 * 44
       self.x[2] = 2 * 44

    def update(self):
        self.updateCount = self.updateCount + 1
        if self.updateCount > self.updateCountMax:

            for i in range(self.length-1, 0, -1):
                self.x[i] = self.x[i-1]
                self.x[i] = self.y[i-1]

            if self.direction == 0:
                self.x[0] = self.x[0] + self.step
            if self.direction == 1:
                self.x[0] = self.x[0] - self.step
            if self.direction == 2:
                self.y[0] = self.y[0] - self.step
            if self.direction == 3:
                self.y[0] = self.y[0] + self.step

            self.updateCount = 0


    def moveRight(self):
        self.direction = 0

    def moveLeft(self):
        self.direction = 1

    def moveUp(self):
        self.direction = 2

    def moveDown(self):
        self.direction = 3 

    def draw(self, surface, image):
        for i in range(0,self.length):
            surface.blit(image,(self.x[i],self.y[i])) 

class Game:
    def isCollision(self,x1,y1,x2,y2,bsize):
        if x1 >= x2 and x1 <= x2 + bsize:
            if y1 >= y2 and y1 <= y2 + bsize:
                return True
        return False

class App:

    windowWidth = 800
    windowHeight = 600
    player = 0
    apple = 0

    def __init__(self):
        self._running = True
        self._display_surf = None
        self._image_surf = None
        self._apple_surf = None
        self.game = Game()
        self.player = Player(3) 
        self.apple = Apple(5,5)

    def on_init(self):
        pygame.init()
        self._display_surf = pygame.display.set_mode((self.windowWidth,self.windowHeight), pygame.HWSURFACE)

        pygame.display.set_caption('Pygame pythonspot.com example')
        self._running = True
        self._image_surf = pygame.image.load("20190809165300949.jpg").convert()
        self._apple_surf = pygame.image.load("20190809165300949.jpg").convert()
        

    def on_event(self, event):
        if event.type == QUIT:
            self._running = False

    def on_loop(self):
        self.player.update()

        for i in range(0,self.player.length):
            if self.game.isCollision(self.apple.x,self.apple.y,self.player.x[i], self.player.y[i],44):
                self.apple.x = randint(2,9) * 44
                self.apple.y = randint(2,9) * 44
                self.player.length = self.player.length + 1


        for i in range(2,self.player.length):
            if self.game.isCollision(self.player.x[0],self.player.y[0],self.player.x[i], self.player.y[i],40):
                print("You lose! Collision: ")
                print("x[0] (" + str(self.player.x[0]) + "," + str(self.player.y[0]) + ")")
                print("x[" + str(i) + "] (" + str(self.player.x[i]) + "," + str(self.player.y[i]) + ")")
                exit(0)

        pass

    def on_render(self):
        self._display_surf.fill((0,0,0))
        self.player.draw(self._display_surf, self._image_surf)
        self.apple.draw(self._display_surf, self._apple_surf)
        pygame.display.flip()

    def on_cleanup(self):
        pygame.quit()

    def on_execute(self):
        if self.on_init() == False:
            self._running = False

        while( self._running ):
            pygame.event.pump()
            keys = pygame.key.get_pressed() 

            if (keys[K_RIGHT]):
                self.player.moveRight()

            if (keys[K_LEFT]):
                self.player.moveLeft()

            if (keys[K_UP]):
                self.player.moveUp()

            if (keys[K_DOWN]):
                self.player.moveDown()

            if (keys[K_ESCAPE]):
                self._running = False

            self.on_loop()
            self.on_render()

            time.sleep (50.0 / 1000.0);
        self.on_cleanup()

if __name__ == "__main__" :
    theApp = App()
    theApp.on_execute()

コード