How to Convert Video to GIF Using Python and MoviePy

Many online services offer video‑to‑GIF conversion but often require payment or display ads; with a few lines of Python you can achieve the same result yourself.

1. Install the required library

pip install moviepy -i https://pypi.tuna.tsinghua.edu.cn/simple

2. Basic conversion code

<code>from moviepy.editor import *
clip = VideoFileClip("movie.mp4")  # path to the source video
clip.write_gif("movie.gif")
</code>

The resulting GIF may be only a few seconds long but can be as large as 9 MB even after resolution scaling.

3. Reducing GIF size

Besides resizing, you can lower the frame rate (fps) to shrink the file:

<code>from moviepy.editor import *
clip = VideoFileClip("movie.mp4").resize((488,225))
clip.write_gif("movie.gif", fps=15)  # 15 frames per second
</code>

Setting the fps to 15 reduces the file to about 2 MB, roughly a four‑fold decrease, with little visual difference.

4. Converting a specific video segment

Use the subclip parameter to select a time range (e.g., 1–2 seconds) before conversion:

<code>from moviepy.editor import *
clip = VideoFileClip("movie.mp4").subclip(t_start=1, t_end=2).resize((488,225))
clip.write_gif("movie.gif", fps=15)
</code>

5. Specifying output resolution

The resize argument can define the final image size directly, either by pixel dimensions or scaling factor:

<code># Set output size to 600×400 pixels
clip = VideoFileClip("movie.mp4").resize((600,400))

# Scale the original video to 50 % of its size
clip = VideoFileClip("movie.mp4").resize(0.5)
</code>

These techniques allow you to control GIF quality and file size efficiently.

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