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试图在python中设置一个字符串的动画效果,我认为我的代码很好,但是文件编写器有问题。我的代码(基于关闭https://jakevdp.github.io/blog/2012/08/18/matplotlib-animation-tutorial/):Python中的FFMPEG文件编写器2.7
import numpy as np
import scipy as sci
import matplotlib.pyplot as plt
import matplotlib.animation as animation
plt.rcParams['animation.ffmpeg_path'] = 'C:\FFMPEG\bin\ffmpeg'
s1=10.15
gamma=(np.pi*np.sqrt(2))/2
gamma=sci.special.jn_zeros(0,10)
gamma1=gamma[9]
gamma2=gamma[8]
print gamma1,gamma2
sigma=np.linspace(0,2*s1,10000)
def xprime(sigma,t):
alpha = gamma1*(np.cos(np.pi*t/s1)*np.cos((np.pi*sigma)/s1))
beta = gamma1*(np.sin(np.pi*t/s1)*np.sin((np.pi*sigma)/s1))
xprime=np.cos(alpha)*np.cos(beta)
return xprime
def yprime(sigma,t):
alpha = gamma2*(np.cos(np.pi*t/s1)*np.cos((np.pi*sigma)/s1))
beta = gamma2*(np.sin(np.pi*t/s1)*np.sin((np.pi*sigma)/s1))
yprime=np.cos(alpha)*np.sin(beta)
return yprime
fig = plt.figure()
ax = plt.axes(xlim=(-0.4, 0.4), ylim=(-3, 3))
line, = ax.plot([], [], lw=2)
def init():
line.set_data([], [])
return line,
def animate(i):
sigma=np.linspace(0,2*s1,10000)
t = (i*2*s1)/200
yint=sci.integrate.cumtrapz(yprime(sigma,t),sigma)
xint=sci.integrate.cumtrapz(xprime(sigma,t),sigma)
line.set_data(xint, yint)
return line,
anim = animation.FuncAnimation(fig, animate, init_func=init,
frames=200, interval=20, blit=True)
FFwriter=animation.FFMpegWriter()
anim.save('basic_animation.mp4', writer=FFwriter, fps=30, extra_args=['-vcodec', 'libx264'])
plt.show()
目前收到错误消息
RuntimeError: Passing in values for arguments for arguments fps, codec, bitrate, extra_args, or metadata is not supported when writer is an existing MovieWriter instance. These should instead be passed as arguments when creating the MovieWriter instance.'
我觉得我的错误是在呼叫或FFmpeg的文件位置,但我不能确定什么我”做错了。可能非常明显,但目前看不到它/不确定错误信息的实际含义。
进展!现在我刚刚得到一个Windows错误'WindowsError:[错误2]系统找不到指定的文件'我认为这是与我的FFMpeg文件的位置 – byBanachTarskiIamcorrect
是的,这是一个不同的错误与您的文件的位置有关,但现在代码工程:P – lapinkoira