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Pythonでgif動画を作成

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初めに

いろいろあってgif動画の出力をする機会があったので,軽くまとめました.かなり短いです.

関数

import imageio

def make_gif(frames, filename, duration=1./60.):
    imageio.mimsave(filename, frames, 'GIF', **{'duration': duration})

引数は (高さ✕幅✕RGB) の画像 (uint8のnp.arrayとかを想定)の配列,出力ファイル名,gif動画のフレームレートです.gif動画の作成の実装はPIL.Imageを使うことが多いですが,自分の環境で何故かうまく行かなかったのでimageioで実装することになりました.

おわり

誰かの役に立てば幸いです.

どんな感じかみたい人用

import imageio
import numpy as np

def make_gif(frames, filename, duration=1./30.):
    imageio.mimsave(filename, frames, 'GIF', **{'duration': duration})

if __name__ == "__main__":
    import gym
    frame = []
    env = gym.make('Seaquest-v0')
    obs = env.reset()
    for _ in range(500):
        obs, _, _, _ = env.step(env.action_space.sample())
        frame.append(obs)

    make_gif(frame, 'out.gif') 

出力はQiita上に貼れなかったのでないです.

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