方法一:通過imageio庫和skimage庫
1. 安裝環境:
pip install imageio
pip install skimage
這時候會報錯Please install the `scikit-image` package (instead of `skimage`)
所以按照提示操作即可:
pip install scikit-image
環境安裝成功。
2.通過python安裝ffmpge(用來解碼視頻流)
import imageio
imageio.plugins.ffmpeg.download()
這時候會提示:
Imageio: 'ffmpeg.linux64' was not found on your computer; downloading it now.Try 1. Download from https://github.com/imageio/imageio-binaries/raw/master/ffmpeg/ffmpeg.linux64 (27.2 MB)Downloading: 8192/28549024 bytes
開始進行下載ffmpeg
注意:下載這個文件很容易斷線,所有可以先拿下載工具下載後,再放到下面路徑,然後系統就會認爲文件已經下載完了。
文件路徑: /root/.imageio/ffmpeg/ffmpeg.linux6
如果不斷線的話,文件就會存放在上述路徑中。
下次執行就可以直接讀取視頻流了。
3. 使用imageio庫提取視頻幀
imageio官方文檔地址:http://imageio.readthedocs.io/en/latest/examples.html
用法:
# coding:utf-8
import pylab
import imageio
#註釋的代碼執行一次就好,以後都會默認下載完成
#imageio.plugins.ffmpeg.download()
import skimage
import numpy as np
#視頻的絕對路徑
filename = 'video/01_01.wmv'
#可以選擇解碼工具
vid = imageio.get_reader(filename, 'ffmpeg')
for num,im in enumerate(vid):
#image的類型是mageio.core.util.Image可用下面這一註釋行轉換爲arrary
print im.mean()
image = skimage.img_as_float(im).astype(np.float64)
fig = pylab.figure()
fig.suptitle('image #{}'.format(num), fontsize=20)
pylab.imshow(im)
pylab.show()
方式二:通過cv2庫
用法:
import cv2
video_full_path="video/01_01.wmv"
cap = cv2.VideoCapture(video_full_path)
print cap.isOpened()
frame_count = 1
success = True
while(success):
success, frame = cap.read()
print 'Read a new frame: ', success
params = []
#params.append(cv.CV_IMWRITE_PXM_BINARY)
params.append(1)
cv2.imwrite("video" + "_%d.jpg" % frame_count, frame, params)
frame_count = frame_count + 1
cap.release()
存在問題:cap.isOpened()總是輸出false,表示打開失敗。沒辦法讀取
問題一直沒有解決,如果有哪位大神解決還往告知!!