Install

opencv with ffmpeg and python (build from source, see Python & Opencv)

conda install opencv-python
pip install opencv-python

imageio

conda install -c conda-forge imageio
pip install imageio

Usage

imageio

>>> import imageio
>>> im = imageio.imread('chelsea.png')
>>> im.shape  # im is a numpy array
(300, 451, 3)
>>> imageio.imwrite('chelsea-gray.jpg', im[:, :, 0])

import imageio
import visvis as vv

im = imageio.imread('http://upload.wikimedia.org/wikipedia/commons/d/de/Wikipedia_Logo_1.0.png')
vv.imshow(im)

import imageio

reader = imageio.get_reader('imageio:cockatoo.mp4')
for i, im in enumerate(reader):
    print('Mean of frame %i is %1.1f' % (i, im.mean()))

import pylab
import imageio
filename = '/tmp/file.mp4'
vid = imageio.get_reader(filename,  'ffmpeg')
nums = [10, 287]
for num in nums:
    image = vid.get_data(num)
    fig = pylab.figure()
    fig.suptitle('image #{}'.format(num), fontsize=20)
    pylab.imshow(image)
pylab.show()

import imageio
import visvis as vv

reader = imageio.get_reader('<video0>')
t = vv.imshow(reader.get_next_data(), clim=(0, 255))
for im in reader:
    vv.processEvents()
    t.SetData(im)

import imageio

reader = imageio.get_reader('imageio:cockatoo.mp4')
fps = reader.get_meta_data()['fps']

writer = imageio.get_writer('~/cockatoo_gray.mp4', fps=fps)

for im in reader:
    writer.append_data(im[:, :, 1])
writer.close()

Python & Video & imshow

1. opencv + video (need ffmpeg build from source)

   1. video

      reader=cv2.VideoCapture('/home/nfs/output.mp4')
      while 1:
          frame=reader.read()
          # from camera
          # _,frame=reader.read()
          if frame is empty:
              break
      
          process(frame)
      

   2. imshow

      cv2.imshow('img',img); cv2.waitkey(0)
      

2. skcikit-image, imageio (need ffmpeg from apt-get)

   1. video

      reader = imageio.get_reader(filename)
      image_nums = reader.get_length() 
      for i, img in enumerate(reader): 
          process(img)
      

   2. imshow

      skimage.io.imshow(img)
      skimage.io.show()
      img_rgb=cv2.cvtColor(img,cv2.COLOR_BGR2RGB) #from opencv img(bgr) to scikit-image img(rgb)
      

3. opencv3 + python3

   import cv2
   
   video_in='/home/yzbx/Videos/sherbrooke_video.avi'
   video_out='/home/yzbx/Videos/imageio_video_write.avi'
   
   cap = cv2.VideoCapture(video_in)
   
   frameNum = 1
   
   StartRead=False
   while True:
       ret,imgcv=cap.read()
   
       if not ret:
           if frameNum < 10:
               print('read failed, redo it')
           elif StartRead:
               print('video finished')
           else:
               print('read failed, check you path or opencv,ffmpeg library')
       else:
   
           if not StartRead:
               height,width,channel=imgcv.shape
               wrt = cv2.VideoWriter(filename=video_out,
                                     fourcc=cv2.VideoWriter_fourcc('M', 'J', 'P', 'G'),
                                     fps=30,
                                     frameSize=(width,height))
               StartRead=True
   
           print('process start, framenum=%d' % frameNum)
   
           wrt.write(imgcv)
   
           print('process end, framenum=%d' % frameNum)
   
       frameNum = frameNum + 1
   
       if frameNum > 100:
           break
   
   cap.release()
   
   if StartRead:
       print('save video to %s'%video_out)
   

Python & Video Stream & Web

1. https://github.com/TibbersDriveMustang/Video-Streaming-Server-and-Client
2. https://en.wikipedia.org/wiki/Real_Time_Streaming_Protocol
3. https://wiki.videolan.org/Documentation:Streaming_HowTo_New/#Streaming_using_the_GUI
4. https://github.com/theopolisme/webcam-streamer
5. http://stackoverflow.com/questions/21702477/how-to-parse-mjpeg-http-stream-from-ip-camera
6. https://gist.github.com/shihyuan/4d834d429763e953a40c
7. http://pythonhosted.org/python-librtmp/

Python & Rstp

1. https://stackoverflow.com/questions/20891936/rtsp-stream-and-opencv-python
2. https://www.youtube.com/watch?v=y6n3rQbMYmc (youtube OpenCV Basics - 13 - VLC & RTSP Streams)