python opencv 调用摄像头保存到本地的avi文件不正确?

Question

1. 环境是ubuntu + opencv 3.3.1-dev + python3.5
2. 代码如下:

# -*- coding:utf-8 -*-

import cv2
import time
import numpy as np

# 打开摄像头
cap = cv2.VideoCapture(0)
# 视屏封装格式
fourcc = cv2.VideoWriter_fourcc(*'MPEG')
# 参数分别为保存为保存文件名, 编码器, 帧率, 大小
out = cv2.VideoWriter('out.avi', fourcc, 20.0, (640, 400))

while True:
    ret, frame = cap.read()
    gray = cv2.cvtColor(frame, cv2.COLOR_BGR2GRAY)
    out.write(frame)
    cv2.imshow('frame', frame)

    # 抓取图像
    if cv2.waitKey(1) & 0xFF == ord('s'):
        cv2.imwrite('image/' + str(int(time.time())) + '.jpg', frame)

    # 退出
    if cv2.waitKey(1) & 0xFF == ord('q'):
        break

cap.release()
out.release()
cv2.destroyAllWindows()

摄像头能正常打开, 图像也能抓取, 但是out.avi保存到本地只有几kb, 也打不开

Answer 1

http://blog.csdn.net/jeapeduc...