Matplotlib中的像素化动画 [英] Pixelated animations in Matplotlib

问题描述

我一直在使用Matplotlib的动画工具来制作动画人物。我注意到一个问题，对于具有大量帧的动画而言，这一问题尤其明显，即数字的质量会迅速下降，从而导致像素化-输出看起来模糊。

I've been using Matplotlib's animation facility to produce animated figures. I've noticed a problem which is particularly noticeable for animations with a large number of frames, which is that the quality of the figures deteriorates very quickly resulting in pixelated - blurry looking output.

示例：

凌乱的网格线

像素化输出

我一直在使用

import matplotlib
matplotlib.use("Agg")

anim = animation.FuncAnimation(fig, ..., blit=False)
mywriter = animation.FFMpegWriter(fps=15)
anim.save("path.mp4", writer=mywriter)

我尝试使用blit = True / False，但没有发现太大差异。

I've tried using blit=True/False but haven't noticed much difference.

Matplotlib版本： 1.4.2。系统：Mac 10.10

Matplotlib version: 1.4.2. System: Mac 10.10

推荐答案

这对我有用。

您可以在创建编写器实例时更改比特率

You can change the bitrate while creating the writer instance

import matplotlib.animation as animation

anim = animation.FuncAnimation(fig, ...)

FFMpegWriter = animation.writers['ffmpeg']
metadata = dict(title='Movie Test', artist='Matplotlib',
                comment='Movie support!')

# Change the video bitrate as you like and add some metadata.
writer = FFMpegWriter(fps=15, bitrate=1000, metadata=metadata)

然后您可以保存您的视频。

Then you can save your video.

anim.save("path.mp4", writer=mywriter)

希望有帮助

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