提交代码

Author: cxhuan

xianhuan/README.md

@@ -10,6 +10,8 @@ Python技术 公众号文章代码库
 
 ## 实例代码
 
+[几行代码，实现Python捕获、播放和保存摄像头视频！](https://github.com/JustDoPython/python-examples/tree/master/xianhuan/videobase)：几行代码，实现Python捕获、播放和保存摄像头视频！
+
 [几行代码迅速提取音频，YYDS！](https://github.com/JustDoPython/python-examples/tree/master/xianhuan/extractaudio)：几行代码迅速提取音频，YYDS！
 
 [一行代码，生成和读取二维码！](https://github.com/JustDoPython/python-examples/tree/master/xianhuan/qrcode)：一行代码，生成和读取二维码！

xianhuan/videobase/capturevideo.py

@@ -0,0 +1,23 @@
+#!/usr/bin/env python3
+# -*- coding: utf-8 -*-
+"""
+@author: 闲欢
+"""
+import cv2 as cv
+cap = cv.VideoCapture(0)
+if not cap.isOpened():
+    print("Cannot open camera")
+    exit()
+while True:
+    # 逐帧捕获
+    ret, frame = cap.read()
+    # 如果正确读取帧，ret为True
+    if not ret:
+        break
+    # 显示结果帧e
+    cv.imshow('frame', frame)
+    if cv.waitKey(1) == ord('q'):
+        break
+# 完成所有操作后，释放捕获器
+cap.release()
+cv.destroyAllWindows()

xianhuan/videobase/playvideo.py

@@ -0,0 +1,17 @@
+#!/usr/bin/env python3
+# -*- coding: utf-8 -*-
+"""
+@author: 闲欢
+"""
+import cv2 as cv
+cap = cv.VideoCapture('video.mp4')
+while cap.isOpened():
+    ret, frame = cap.read()
+    # 如果正确读取帧，ret为True
+    if not ret:
+        break
+    cv.imshow('frame', frame)
+    if cv.waitKey(25) == ord('q'):
+        break
+cap.release()
+cv.destroyAllWindows()

xianhuan/videobase/savevideo.py

@@ -0,0 +1,24 @@
+#!/usr/bin/env python3
+# -*- coding: utf-8 -*-
+"""
+@author: 闲欢
+"""
+import cv2 as cv
+cap = cv.VideoCapture(0)
+# 定义编解码器并创建VideoWriter对象
+fourcc = cv.VideoWriter_fourcc(*'MJPG')
+out = cv.VideoWriter('output.mp4', fourcc, 20.0, (640,  480))
+while cap.isOpened():
+    ret, frame = cap.read()
+    if not ret:
+        break
+    frame = cv.flip(frame, 1)
+    # 写翻转的框架
+    out.write(frame)
+    cv.imshow('frame', frame)
+    if cv.waitKey(1) == ord('q'):
+        break
+# 完成工作后释放所有内容
+cap.release()
+out.release()
+cv.destroyAllWindows()