moviepy实现9宫格的场景

1. 问题描述和解答

2. 代码实现

import math
import random
import uuid
from moviepy.editor import *


def center_image(file_name, width, height, scale, pos_x, pos_y):
    w = (width - pos_x * width * 2) / scale
    h = (height - pos_y * height * 2) / scale

    x = pos_x * width / (2 * scale)
    y = pos_y * height / (2 * scale)
    x = math.ceil(x) + random.randint(10, 20)   # 放置计算误差导致x、y偏小
    y = math.ceil(y) + random.randint(10, 20)

    new_w = 6 * x + 3 * w
    new_h = 6 * y + 3 * h

    crop_w = int(new_w / 2 - width / 2)
    crop_h = int(new_h / 2 - height / 2)

    clip1 = ImageClip(file_name)
    clip_w, clip_h = clip1.size

    ratio = clip_w / w
    clip1 = clip1.fx(vfx.resize, newsize=(w, h))
    clip1 = clip1.fx(vfx.margin, left=x, right=x,
                     top=y, bottom=y,
                     color=(255, 255, 255), opacity=0.0)

    clip2 = clip1.fx(vfx.mirror_x)
    clip3 = clip1.fx(vfx.mirror_y)
    clip31 = clip3.fx(vfx.mirror_x)
    final_clip = clips_array([[clip31, clip3, clip31],
                              [clip2, clip1, clip2],
                              [clip31, clip3, clip31]])

    print(final_clip.size)
    final_clip = final_clip.fx(vfx.crop, x1=crop_w, y1=crop_h, width=width, height=height)
    save_file = str(uuid.uuid4()) + '.png'
    final_clip.save_frame(save_file, withmask=True)
    return final_clip, ratio


if __name__ == '__main__':
    def size(t, total_duration, start_scale, end_scale):
        if start_scale == end_scale:
            return end_scale
        if t < total_duration:
            relative_time = t / total_duration
            scale = start_scale + relative_time * (end_scale - start_scale)
        else:
            scale = end_scale
        return scale


    in_scale = 0.75
    pos_x, pos_y = (1 - in_scale) / 2, (1 - in_scale) / 2
    scale = 2.0
    width = 1080
    height = 1440
    s = '/Users/admin/an.jpg'
    final_clip, ratio = center_image(s, width, height, scale, pos_x, pos_y)
    final_clip = final_clip.to_ImageClip()
    duration = 3
    ic = ImageClip("/Users/admin/2.jpg",
                   duration=duration)
    ic = ic.resize((width, height))

    final_clip = final_clip.set_duration(duration)
    final_clip = final_clip.resize(lambda t: size(t, duration, 1.0, scale))
    final_clip = final_clip.set_position(('center', 'center'))

    cvc = CompositeVideoClip([ic, final_clip])
    cvc.write_videofile("r1.mp4", fps=24)

3. 结果和素材

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