OpenCV + python-从视频文件中获取帧 [英] OpenCV + python -- grab frames from a video file
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问题描述
我似乎无法使用OpenCV捕获文件中的帧-我已经在Ubuntu上从源代码编译了所有必要的先决条件,具体取决于:
I can't seem to capture frames from a file using OpenCV -- I've compiled from source on Ubuntu with all the necessary prereqs according to: http://opencv.willowgarage.com/wiki/InstallGuide%20%3A%20Debian
#!/usr/bin/env python
import cv
import sys
files = sys.argv[1:]
for f in files:
capture = cv.CaptureFromFile(f)
print capture
print cv.GetCaptureProperty(capture, cv.CV_CAP_PROP_FRAME_WIDTH)
print cv.GetCaptureProperty(capture, cv.CV_CAP_PROP_FRAME_HEIGHT)
for i in xrange(10000):
frame = cv.QueryFrame(capture)
if frame:
print frame
输出:
ubuntu@local:~/opencv$ ./test.py bbb.avi
<Capture 0xa37b130>
0.0
0.0
框架始终为无...
我已经使用以下方法将视频文件转码为i420格式:
I've transcoded a video file to i420 format using:
mencoder $1 -nosound -ovc raw -vf format=i420 -o $2
有什么想法吗?
推荐答案
您没有安装gstreamer-ffmpeg
或gsteamer-python
或gsteamer-python-devel
软件包.我安装了所有三个.并解决了完全相同的问题.
You don't have the gstreamer-ffmpeg
or gsteamer-python
or gsteamer-python-devel
packages installed. I installed all three of them. and the exact same problem was resolved.
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