Question

我是使用python进行图像处理的初学者。

我想将视频播放器制作在ubuntu enter link description here的SMplayer之类的嵌入式板（LattePanda）上

所以我写了这样的代码

#-*- coding:utf-8 -*-
__Version__ = '1.0V'

import os, sys, time
import cv2
from Queue import Queue
from threading import Thread

print cv2.useOptimized()

class FileVideoStream:
        def __init__(self, path, queuesize=512):
                self.stream = cv2.VideoCapture(path)
                self.stopped = False
                self.Q = Queue(maxsize=queuesize)

        def start(self):
                t = Thread(target=self.update, args=())
                t.daemon = True
                t.start()
                return self

        def update(self):
                while True:
                        if self.stopped:
                                return

                        if not self.Q.full():
                                (ret, frame) = self.stream.read()

                                if not ret:
                                        self.stop()
                                        return

                                self.Q.put(frame)

        def read(self):
                return self.Q.get()

        def more(self):
                return self.Q.qsize() > 0

        def stop(self):
                self.stopped = True


def main():
        window_name = 'window'
        fvs = FileVideoStream('test.mp4').start()

        cv2.namedWindow(window_name, cv2.WND_PROP_FULLSCREEN)
        cv2.setWindowProperty(window_name, cv2.WND_PROP_FULLSCREEN, cv2.WINDOW_FULLSCREEN)

        while True:
                qsize = '%s' % str(fvs.Q.qsize())
                qsize = int(qsize)
                if qsize > 2:
                        break
                else:
                        time.sleep(0.5)

        while fvs.more():
                frame = fvs.read()
                cv2.imshow(window_name, frame)
                cv2.waitKey(1)

if __name__ == '__main__':
        main()

但是此代码的结果比SMplayer慢得多。不光滑。请帮助我，像SMplayer这样的视频播放器如何流畅播放？

Python OpenCV视频播放非常慢

0 个答案: