自动化视频编辑脚本设计
下面是一个基于Python的自动化视频编辑脚本设计，能够处理视频剪辑、添加字幕、文本动画、音效和图形等功能。该脚本可以结合AI生成指令并从免版税资源库获取素材。
系统架构
python
import os
import json
import requests
from moviepy.editor import *
from moviepy.config import change_settings
from datetime import timedelta
import numpy as np
from PIL import Image, ImageDraw, ImageFont
import textwrap
import random
import openai # 用于与ChatGPT API交互
from pytube import YouTube # 用于从YouTube获取免版税内容（可选）
import tempfile
# 初始化设置
change_settings({"IMAGEMAGICK_BINARY": "/usr/local/bin/convert"}) # 确保ImageMagick已安装主要类设计
python
class AutoVideoEditor:
def __init__(self, config_file="config.json"):
"""
初始化视频编辑器
:param config_file: 配置文件路径
"""
self.config = self.load_config(config_file)
self.video_clip = None
self.audio_clip = None
self.subtitles = []
self.effects = []
self.assets = {
"images": [],
"videos": [],
"audio": []
}
# 初始化AI服务
openai.api_key = self.config.get("openai_api_key", "")
def load_config(self, config_file):
"""加载配置文件"""
try:
with open(config_file, 'r') as f:
return json.load(f)
except FileNotFoundError:
print(f"Config file {config_file} not found. Using default settings.")
return {
"openai_api_key": "",
"royalty_free_sources": {
"images": ["https://pixabay.com/", "https://unsplash.com/"],
"videos": ["https://pixabay.com/videos/"],
"audio": ["https://freesound.org/"]
},
"default_font": "Arial",
"output_resolution": (1920, 1080),
"temp_dir": tempfile.gettempdir()
}
def load_video(self, video_path, audio_path=None):
"""
加载视频和音频文件
:param video_path: 视频文件路径
:param audio_path: 可选，单独的音频文件路径
"""
self.video_clip = VideoFileClip(video_path)
if audio_path:
self.audio_clip = AudioFileClip(audio_path)
else:
self.audio_clip = self.video_clip.audio
def load_transcript(self, transcript_path):
"""
加载包含时间戳的字幕文件
:param transcript_path: 字幕文件路径 (JSON格式)
"""
with open(transcript_path, 'r') as f:
self.subtitles = json.load(f)
def get_ai_instructions(self, prompt):
"""
从ChatGPT获取编辑指令
:param prompt: 给AI的提示
:return: AI生成的编辑指令
"""
response = openai.ChatCompletion.create(
model="gpt-4",
messages=[
{"role": "system", "content": "You are a professional video editor. Provide clear instructions for editing a video based on the given transcript and requirements."},
{"role": "user", "content": prompt}
]
)
return response.choices[0].message.content
def fetch_royalty_free_asset(self, asset_type, query):
"""
从免版税来源获取资源（图片、视频或音频）
:param asset_type: "image", "video" 或 "audio"
:param query: 搜索查询
:return: 下载的素材文件路径
"""
# 这里应该实现实际的API调用，以下是伪代码
print(f"Searching for {asset_type} with query: {query}")
# 在实际应用中，这里会调用相应网站的API
# 例如使用Pixabay或Unsplash的API
# 模拟返回一个本地测试文件
if asset_type == "image":
return "assets/sample_image.jpg"
elif asset_type == "video":
return "assets/sample_video.mp4"
elif asset_type == "audio":
return "assets/sample_audio.mp3"
else:
raise ValueError(f"Unknown asset type: {asset_type}")
def generate_ai_image(self, prompt):
"""
使用AI生成图片
:param prompt: 图片生成提示
:return: 生成的图片文件路径
"""
# 这里可以使用DALL-E、Stable Diffusion等API
# 以下是使用OpenAI DALL-E的示例
response = openai.Image.create(
prompt=prompt,
n=1,
size="1024x1024"
)
image_url = response['data'][0]['url']
# 下载图片到临时文件
temp_file = os.path.join(self.config["temp_dir"], f"ai_image_{random.randint(0, 10000)}.jpg")
with open(temp_file, 'wb') as f:
f.write(requests.get(image_url).content)
return temp_file
def add_subtitles(self):
"""根据加载的字幕信息添加字幕到视频"""
if not self.subtitles or not self.video_clip:
raise ValueError("No subtitles or video loaded")
subtitle_clips = []
for sub in self.subtitles:
# 创建文本剪辑
txt_clip = TextClip(
sub['text'],
fontsize=self.config.get("subtitle_font_size", 40),
color=self.config.get("subtitle_color", "white"),
font=self.config.get("default_font", "Arial"),
stroke_color=self.config.get("subtitle_stroke_color", "black"),
stroke_width=self.config.get("subtitle_stroke_width", 2)
)
# 设置字幕位置和持续时间
txt_clip = txt_clip.set_position(
('center', self.config.get("subtitle_y_position", 0.8)),
relative=True
).set_duration(sub['end'] - sub['start']).set_start(sub['start'])
subtitle_clips.append(txt_clip)
# 将所有字幕剪辑组合成一个CompositeVideoClip
self.video_clip = CompositeVideoClip([self.video_clip] + subtitle_clips)
def add_text_animation(self, text, duration, position, style="fade"):
"""
添加文本动画
:param text: 要显示的文本
:param duration: 动画持续时间(秒)
:param position: 文本位置 (x, y) 或相对位置字符串
:param style: 动画样式 ("fade", "slide", "typewriter"等)
"""
if style == "fade":
# 淡入淡出效果
txt_clip = TextClip(
text,
fontsize=50,
color='white',
font=self.config.get("default_font", "Arial")
).set_position(position).set_duration(duration)
# 添加淡入淡出效果
txt_clip = txt_clip.crossfadein(0.5).crossfadeout(0.5)
elif style == "typewriter":
# 打字机效果
frames = []
for i in range(1, len(text)+1):
frame = TextClip(
text[:i],
fontsize=50,
color='white',
font=self.config.get("default_font", "Arial")
).set_position(position).set_duration(duration/len(text))
frames.append(frame)
txt_clip = concatenate_videoclips(frames)
# 将文本动画添加到效果列表
self.effects.append(txt_clip)
def add_sound_effect(self, sound_file, start_time, volume=1.0):
"""
添加音效
:param sound_file: 音效文件路径
:param start_time: 音效开始时间(秒)
:param volume: 音量 (0.0-1.0)
"""
sound_clip = AudioFileClip(sound_file).volumex(volume)
sound_clip = sound_clip.set_start(start_time)
# 将音效添加到音频剪辑
self.audio_clip = CompositeAudioClip([self.audio_clip, sound_clip])
def add_graphic(self, image_path, duration, position, size=None, animation=None):
"""
添加图形/图片
:param image_path: 图片路径
:param duration: 显示持续时间(秒)
:param position: 位置 (x, y) 或相对位置字符串
:param size: 可选，调整大小 (width, height)
:param animation: 可选，动画效果 ("zoom", "fade", "slide"等)
"""
img_clip = ImageClip(image_path, duration=duration)
if size:
img_clip = img_clip.resize(size)
img_clip = img_clip.set_position(position)
if animation == "zoom":
# 缩放动画
start_scale, end_scale = 0.5, 1.0
img_clip = img_clip.fl_time(
lambda t: img_clip.resize(start_scale + (end_scale - start_scale) * t/duration)
)
self.effects.append(img_clip)
def apply_transitions(self):
"""在剪辑之间应用转场效果"""
# 这里可以实现各种转场效果
pass
def render_video(self, output_path):
"""
渲染最终视频
:param output_path: 输出文件路径
"""
if not self.video_clip:
raise ValueError("No video loaded")
# 应用所有效果
if self.effects:
self.video_clip = CompositeVideoClip([self.video_clip] + self.effects)
# 设置音频
if self.audio_clip:
self.video_clip = self.video_clip.set_audio(self.audio_clip)
# 设置输出分辨率
if "output_resolution" in self.config:
self.video_clip = self.video_clip.resize(self.config["output_resolution"])
# 写入输出文件
self.video_clip.write_videofile(
output_path,
codec='libx264',
audio_codec='aac',
fps=24,
threads=4
)
# 关闭所有剪辑以释放资源
self.video_clip.close()
if self.audio_clip:
self.audio_clip.close()
print(f"Video successfully rendered to {output_path}")使用示例
python
if __name__ == "__main__":
# 初始化编辑器
editor = AutoVideoEditor()
# 加载视频和字幕
editor.load_video("input_video.mp4")
editor.load_transcript("transcript.json")
# 从AI获取编辑指令（示例）
ai_instructions = editor.get_ai_instructions(
"Please suggest creative editing for this video transcript. "
"It's a travel vlog about a trip to Japan. "
"Add appropriate text animations, sound effects and graphics."
)
print("AI Editing Instructions:", ai_instructions)
# 添加字幕
editor.add_subtitles()
# 添加文本动画
editor.add_text_animation(
"Japan Adventure",
duration=5,
position=("center", 0.3),
style="typewriter"
)
# 添加图形（从免版税来源获取）
image_path = editor.fetch_royalty_free_asset(
"image",
"Japanese cherry blossom"
)
editor.add_graphic(
image_path,
duration=10,
position=("right", "bottom"),
size=(300, 200),
animation="fade"
)
# 添加音效
sound_effect_path = editor.fetch_royalty_free_asset(
"audio",
"Japanese traditional music"
)
editor.add_sound_effect(sound_effect_path, start_time=0, volume=0.3)
# 渲染最终视频
editor.render_video("output_video.mp4")字幕文件格式示例 (transcript.json)
json
[
{
"text": "Welcome to our Japan adventure!",
"start": 0.5,
"end": 3.2
},
{
"text": "Today we're exploring the beautiful streets of Kyoto.",
"start": 3.3,
"end": 6.8
},
{
"text": "The cherry blossoms are in full bloom this season.",
"start": 7.0,
"end": 10.5
}
]扩展功能建议
- AI驱动的自动编辑：使用ChatGPT分析视频内容并生成完整的编辑指令
- 高级转场效果：实现更多专业转场效果（溶解、擦除、3D旋转等）
- 语音识别集成：自动从音频生成时间戳字幕
- 音乐同步：自动将剪辑与音乐节拍同步
- 颜色校正：添加自动颜色分级功能
- 面部识别：自动检测和跟踪视频中的面部
- 多平台输出：优化不同平台（YouTube, Instagram, TikTok）的输出设置
依赖安装
运行此脚本需要安装以下Python包：
pip install moviepy openai pytube requests pillow numpy此外，需要安装ImageMagick用于文本渲染（在macOS上可以使用brew install imagemagick安装）。
这个脚本提供了一个基础框架，可以根据具体需求进行扩展和定制。