问题描述
我最近冒险涉足与音频和视频相关的编码，而且我对这两者都不了解.
I have recently ventured out into dealing with audio and video related coding and i have limited knowledge about neither one of them.
碰巧我有一个正在处理mpeg-2视频的项目.有没有可用的python库可提取mpeg-2视频本身的持续时间?
It happens that i have a project that is dealing with mpeg-2 video now. Is there any python library that available out there to extract the duration of the mpeg-2 video itself?
推荐答案
我不知道任何纯python实现.但是也许opencv绑定对您有用:
I don't know any pure python implementations. But maybe the opencv bindings works for you:
import cv
cvcapture = cv.CaptureFromFile("movie.mpg")
cv.GetCaptureProperty(cvcapture,cv.CV_CAP_PROP_FRAME_COUNT)
否则，可以使用pyffmpeg.当心:根据我的经验，帧数通常不是很准确. Opencv 2.6可以很好地工作，但是更便宜的版本有时只会带来垃圾.
Otherwise, maye you can use pyffmpeg. Beware: It is my experience that the frame count is often not very accurate. Opencv 2.6 works very well, but ealier versions gives sometimes just garbage.
啊，对不起我的错误:这只给您帧数.在持续时间内:将其乘以帧速率:
Ah, sorry my mistake: This gives you the frame count only. For the duration: Multiply this with the frame rate:
cv.GetCaptureProperty(cvcapture,cv.CV_CAP_PROP_FPS)
这篇关于mpeg-2库以提取视频时长的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！