获取视频帧数和总帧数

获取视频帧数和总帧数代码

import cv2
videoPath=input("请输入视屏文件的绝对路径：")
# 将视频文件路径转化为标准的路径
videoPath=videoPath.replace("\\","/").replace('"','').replace("'","").strip()
# 视屏获取
videoCapture=cv2.VideoCapture(videoPath)
# 帧率(frames per second)
fps = videoCapture.get(cv2.CAP_PROP_FPS)
# 总帧数(frames)
frames = videoCapture.get(cv2.CAP_PROP_FRAME_COUNT)
print("帧数："+str(fps))
print("总帧数："+str(frames))
print("视屏总时长："+"{0:.2f}".format(frames/fps)+"秒")

其他
在三维重构或其他项目中，往往需要获取每一张图片的时间戳，这时可以使用如下代码：

import time
print("{:.6f}".format(time.time()))

1
2
demo:

04-应用

import os
import cv2
import time

videoPath=input("请输入视屏文件的绝对路径：")
# 将视频文件路径转化为标准的路径
videoPath=videoPath.replace("\\","/").replace('"','').replace("'","")
# 视屏获取
videoCapture=cv2.VideoCapture(videoPath)
# 帧率(frames per second)
fps = videoCapture.get(cv2.CAP_PROP_FPS)
# 总帧数(frames)
frames = videoCapture.get(cv2.CAP_PROP_FRAME_COUNT)

#图片存储地址：
pathSave="./data/rgb/"
if(os.path.exists(pathSave)!=True):
    os.makedirs(pathSave)

#间隔多少帧取一张图片
skipNum=2  #注：间隔2帧取一个图；
count=0
f=open("./data/"+"rgb.txt","w",encoding="utf-8")
f.write("# timestamp filename\n")
while (True):
    ret,frame=videoCapture.read()
    if(ret):
        if(count%(skipNum+1)==0):
            imgName="{:.6f}".format(time.time()+1.0*skipNum/fps-0.001*skipNum)
            imgPath=" rgb/"+imgName+ '.png'
            cv2.imwrite(pathSave + imgName + '.png', frame) 
            f.write(imgName+imgPath+"\n")
        count+=1
#         cv2.waitKey(int(1.0*skipNum/fps*1000))
        cv2.waitKey(1)
#         time.sleep()
    else:
        print("视屏处理完毕！")
        break
videoCapture.release()
f.close()