Python Matplotlib 将动画保存为视频，但内容为空

发布于05月21日

我试图制作一个动画，继续旋转图像，但输出的视频文件有空的内容(只剩下轴)，如何修复它？

import math

import numpy as np
import matplotlib.pyplot as plt
from matplotlib.animation import FuncAnimation
import scipy.misc
from scipy import ndimage

my_image="img.png"
out_file="myvideo.mp4"

class UpdateDist:
    def __init__(self, ax):
        self.ax = ax
        self.img = mpimg.imread(my_image)
        self.ax.imshow(self.img)
        self.degree = 1


    def __call__(self, i):
        rotated_img = ndimage.rotate(img, self.degree*10)
        self.ax.imshow(rotated_img)
        self.degree += 1
        return self.ax,


plt.axis(False)
plt.grid(False)
fig, ax = plt.subplots()


ud = UpdateDist(ax)
anim = FuncAnimation(fig, ud, frames=100, interval=10, blit=True)
plt.show()
ani.save(out_file, fps=30, extra_args=['-vcodec', 'libx264'])

完整代码

import matplotlib.pyplot as plt
from matplotlib.animation import Func动画
from scipy import ndimage
import numpy as np


my_image='img.png'
out_file='myvideo.gif'


class UpdateDist:

    def __init__(self, ax, rotational_speed):
        self.ax = ax
        self.img = plt.imread(my_image)
        self.rotational_speed = rotational_speed

    def __call__(self, i):
        rotated_img = ndimage.rotate(self.img, self.rotational_speed*i, reshape=False)
        self.ax.clear()
        self.ax.grid(False)
        self.ax.axis(False)
        self.ax.imshow((rotated_img*255).astype(np.uint8))
        return self.ax,


fig, ax = plt.subplots()

ud = UpdateDist(ax = ax, rotational_speed = 1)
anim = Func动画(fig, ud, frames = 91, interval = 1)
anim.save(filename = out_file, writer = 'pillow', fps = 30)