GIF 变速

复制from PIL import Image, ImageSequence

# 读取 GIF，提取所有帧并记录每帧延迟
frames = []
durations = []
with Image.open("input.gif") as img:
    for frame in ImageSequence.Iterator(img):
        frames.append(frame.copy())
        durations.append(frame.info.get("duration", 100))  # 默认 100ms

# 加速 2 倍：每帧延迟减半
speed_factor = 2.0
new_durations = [int(d / speed_factor) for d in durations]

# 保存为新 GIF
frames[0].save(
    "output.gif",
    save_all=True,
    append_images=frames[1:],
    duration=new_durations,
    loop=0
)

复制package main

import (
	"image/gif"
	"os"
)

func main() {
	// 打开输入 GIF
	f, _ := os.Open("input.gif")
	defer f.Close()
	g, _ := gif.DecodeAll(f)

	// 减速 0.5 倍：每帧延迟加倍
	speedFactor := 0.5
	for i := range g.Delay {
		g.Delay[i] = int(float64(g.Delay[i]) / speedFactor)
	}

	// 写入输出
	out, _ := os.Create("output.gif")
	defer out.Close()
	gif.EncodeAll(out, g)
}

复制const sharp = require('sharp');

// 使用 sharp 调整 GIF 帧率（需配合 ffmpeg 或 gifski）
// 此处演示用 sharp 提取帧并重新组合（简化版）

async function changeSpeed(inputPath, outputPath, speedFactor) {
  // 读取 GIF 为 Buffer
  const input = require('fs').readFileSync(inputPath);
  
  // 提取所有帧（sharp 默认输出每帧 PNG）
  const frames = await sharp(input, { animated: true })
    .raw()
    .toBuffer({ resolveWithObject: true });

  // 实际场景需用 gifwrap 或 gifencoder 重新编码
  // 此处仅示意：调整每帧延迟需解析 GIF 元数据
  console.log(`帧数: ${frames.info.pages}`);
  console.log(`调整速度: ${speedFactor}x`);
}

changeSpeed('input.gif', 'output.gif', 2.0);