如何从 matplotlib 中的图像数组制作视频? [英] How can I make a video from array of images in matplotlib?

问题描述

我有几张图片展示了事物是如何随时间变化的.我使用以下代码将它们可视化为同一图上的许多图像:

I have a couple of images that show how something changes in time. I visualize them as many images on the same plot with the following code:

import matplotlib.pyplot as plt
import matplotlib.cm as cm

img = [] # some array of images
fig = plt.figure()
for i in xrange(6):
    fig.add_subplot(2, 3, i + 1)
    plt.imshow(img[i], cmap=cm.Greys_r)

plt.show()

并得到类似:

这没关系，但我宁愿为它们设置动画以获得 类似这个视频的东西.我怎样才能用 python 实现这一点，最好(不一定)用 matplotlib

Which is ok, but I would rather animate them to get something like this video. How can I achieve this with python and preferably (not necessarily) with matplotlib

推荐答案

为了自己的未来，这就是我的结局:

For a future myself, here is what I ended up with:

def generate_video(img):
    for i in xrange(len(img)):
        plt.imshow(img[i], cmap=cm.Greys_r)
        plt.savefig(folder + "/file%02d.png" % i)

    os.chdir("your_folder")
    subprocess.call([
        'ffmpeg', '-framerate', '8', '-i', 'file%02d.png', '-r', '30', '-pix_fmt', 'yuv420p',
        'video_name.mp4'
    ])
    for file_name in glob.glob("*.png"):
        os.remove(file_name)

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