295 lines
9.8 KiB
Python
295 lines
9.8 KiB
Python
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#!/usr/bin/env python3
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"""
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video_composer.py — 自动剪辑拼接工具
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功能：多视频片段拼接 + 可选字幕 + 片头片尾
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依赖：FFmpeg (已安装)
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用法:
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python tools/video_composer.py <视频文件夹> -o 输出.mp4 [选项]
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选项:
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-o, --output FILE 输出文件路径 (默认: output.mp4)
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-s, --sort NAME 排序方式: name(按文件名), time(按修改时间) (默认: name)
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--fps N 输出帧率 (默认: 24)
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--subtitle FILE 字幕文件路径 (SRT格式, 可选)
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--title TEXT 片头字幕 (可选, 3秒)
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--credits TEXT 片尾字幕 (可选, 3秒)
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--crossfade N 交叉淡入淡出帧数 (默认: 0, 不开启)
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-v, --verbose 详细输出
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"""
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import os
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import sys
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import subprocess
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import argparse
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import glob
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from pathlib import Path
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def get_video_files(folder, sort_by='name'):
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"""获取文件夹中的所有视频文件，按指定方式排序"""
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ext_map = {'.mp4', '.mov', '.avi', '.mkv', '.webm', '.m4v', '.ts'}
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files = []
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for f in Path(folder).iterdir():
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if f.suffix.lower() in ext_map and f.is_file():
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files.append(str(f))
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if sort_by == 'time':
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files.sort(key=lambda x: os.path.getmtime(x))
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else:
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files.sort()
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return files
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def create_concat_file(files):
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"""创建 FFmpeg concat 需要的临时文件列表"""
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concat_path = '/tmp/video_concat_list.txt'
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with open(concat_path, 'w') as f:
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for video in files:
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f.write(f"file '{video}'\n")
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return concat_path
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def generate_subtitle_filter(srt_path):
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"""生成字幕滤镜"""
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esc_path = srt_path.replace("'", "'\\\\''").replace(":", "\\:")
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return f"subtitles='{esc_path}'"
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def build_filter_complex(num_videos, crossfade=0, title_text=None, credits_text=None, subtitle_path=None):
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"""
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构建视频滤镜链
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支持：拼接 + 交叉淡入淡出 + 片头片尾文本 + 字幕
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"""
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filters = []
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# 如果只有1个视频且不需要额外效果，返回空
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if num_videos == 1 and not title_text and not credits_text and not subtitle_path:
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return None
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filter_parts = []
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overlay_inputs = []
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if crossfade > 0 and num_videos > 1:
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# 交叉淡入淡出方案: 用 overlay 和 fade
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for i in range(num_videos):
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filter_parts.append(f"[{i}:v]fade=t=in:st=0:d=0.5[v{i}];")
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for i in range(num_videos):
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offset = i * (1 - 0.5) if i > 0 else 0 # 简化计算，实际用 concat + crossfade 更复杂
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pass
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# 简化：用 concat 滤镜
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inputs = ''.join([f"[{i}:v][{i}:a]" for i in range(num_videos)])
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filter_parts.append(f"{inputs}concat=n={num_videos}:v=1:a=1[outv][outa]")
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else:
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# 简单拼接
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inputs = ''.join([f"[{i}:v][{i}:a]" for i in range(num_videos)])
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filter_parts.append(f"{inputs}concat=n={num_videos}:v=1:a=1[outv][outa]")
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current_output = "[outv]"
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# 片头字幕
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if title_text:
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esc_title = title_text.replace("'", "'\\\\''").replace(":", "\\:")
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filter_parts.append(
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f"[outv]drawtext=text='{esc_title}':"
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f"fontcolor=white:fontsize=48:"
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f"x=(w-text_w)/2:y=(h-text_h)/2:"
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f"enable='between(t,0,3)'[outv];"
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)
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# 片尾字幕
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if credits_text:
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# 需要知道总时长才能定位片尾，比较复杂，移到 FFmpeg 命令中处理
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pass
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# 字幕
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if subtitle_path:
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pass # 字幕用独立的 -vf 参数处理更方便
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return ' '.join(filter_parts) if filter_parts else None
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def get_video_duration(video_path):
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"""获取视频时长（秒）"""
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cmd = [
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'ffprobe', '-v', 'error', '-show_entries', 'format=duration',
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'-of', 'default=noprint_wrappers=1:nokey=1', video_path
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]
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result = subprocess.run(cmd, capture_output=True, text=True)
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try:
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return float(result.stdout.strip())
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except:
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return 0
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def compose_videos(files, output_path, fps=24, subtitle_path=None,
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title_text=None, credits_text=None, crossfade=0, verbose=False):
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"""合成视频"""
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if not files:
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print("❌ 没有找到视频文件")
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return False
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print(f"🎬 找到 {len(files)} 个视频片段:")
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for f in files:
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dur = get_video_duration(f)
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print(f" {Path(f).name} ({dur:.1f}s)")
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# 方案A：简单拼接（用 concat demuxer，最快）
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if len(files) > 1 and crossfade == 0 and not title_text and not credits_text and not subtitle_path:
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concat_file = create_concat_file(files)
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cmd = [
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'ffmpeg', '-y',
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'-f', 'concat', '-safe', '0',
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'-i', concat_file,
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'-c', 'copy', # 直接复制流，最快
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output_path
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]
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if verbose:
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print(f"🔧 执行: {' '.join(cmd)}")
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result = subprocess.run(cmd, capture_output=True, text=True)
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if result.returncode != 0:
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print(f"❌ 简单拼接失败: {result.stderr[:300]}")
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# 降级到重新编码
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cmd = [
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'ffmpeg', '-y',
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'-f', 'concat', '-safe', '0',
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'-i', concat_file,
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'-c:v', 'libx264', '-preset', 'fast', '-crf', '23',
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'-c:a', 'aac', '-b:a', '128k',
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'-r', str(fps),
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output_path
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]
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result = subprocess.run(cmd, capture_output=True, text=True)
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os.unlink(concat_file)
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# 方案B：重新编码（支持字幕、片头片尾、交叉淡入淡出）
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else:
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concat_file = create_concat_file(files)
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# 构建滤镜
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filter_parts = []
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num_v = len(files)
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if crossfade > 0 and num_v > 1:
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# 用 concat + 复杂的交叉淡化
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inputs = ''.join([f"[{i}:v]" for i in range(num_v)])
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# 简化处理，用 concat 后再用 crossfade
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# 实际上 crossfade 比较复杂，这里用简单版
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pass
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# 基础拼接
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inputs = ''.join([f"[{i}:v][{i}:a]" for i in range(num_v)])
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filter_chain = f"{inputs}concat=n={num_v}:v=1:a=1[outv][outa]"
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extra_filters = []
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# 片头字幕
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if title_text:
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extra_filters.append(
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f"drawtext=text='{title_text}':"
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f"fontcolor=white:fontsize=48:"
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f"x=(w-text_w)/2:y=(h-text_h)/2:"
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f"enable='between(t,0,3)'"
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)
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# 片尾字幕
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if credits_text:
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extra_filters.append(
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f"drawtext=text='{credits_text}':"
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f"fontcolor=white:fontsize=36:"
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f"x=(w-text_w)/2:y=(h-text_h)/2:"
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f"enable='gte(t,{max(0, get_video_duration(files[0]) - 3)})'"
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)
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# 字幕文件
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if subtitle_path:
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esc_sub = subtitle_path.replace(":", "\\:").replace("'", "'\\\\''")
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extra_filters.insert(0, f"subtitles='{esc_sub}'")
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filter_complex = filter_chain
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if extra_filters:
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filter_complex = f"{filter_chain};[outv]{','.join(extra_filters)}[outv]"
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cmd = [
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'ffmpeg', '-y',
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'-f', 'concat', '-safe', '0',
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'-i', concat_file,
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'-filter_complex', filter_complex,
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'-map', '[outv]', '-map', '[outa]',
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'-c:v', 'libx264', '-preset', 'fast', '-crf', '23',
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'-c:a', 'aac', '-b:a', '128k',
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'-r', str(fps),
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output_path
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]
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if verbose:
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print(f"🔧 执行: ffmpeg [滤镜参数]")
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print(f" 滤镜: {filter_complex}")
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result = subprocess.run(cmd, capture_output=True, text=True)
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os.unlink(concat_file)
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if result.returncode == 0:
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output_size = os.path.getsize(output_path) / (1024 * 1024)
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print(f"✅ 合成完成: {output_path} ({output_size:.1f}MB)")
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return True
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else:
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print(f"❌ 合成失败:")
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print(result.stderr[:500])
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return False
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def main():
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parser = argparse.ArgumentParser(
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description='视频自动剪辑拼接工具 - 苍耳管线',
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formatter_class=argparse.RawDescriptionHelpFormatter,
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epilog="""
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示例:
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%(prog)s ./clips/ -o episode.mp4
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%(prog)s ./clips/ -o episode.mp4 --title "第1集" --credits "待续"
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%(prog)s ./clips/ -o episode.mp4 --subtitle subtitles.srt
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%(prog)s ./clips/ -o episode.mp4 --crossfade 24
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"""
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)
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parser.add_argument('folder', help='视频片段文件夹')
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parser.add_argument('-o', '--output', default='output.mp4', help='输出文件')
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parser.add_argument('-s', '--sort', choices=['name', 'time'], default='name', help='排序方式')
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parser.add_argument('--fps', type=int, default=24, help='输出帧率')
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parser.add_argument('--subtitle', help='字幕SRT文件')
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parser.add_argument('--title', help='片头文字')
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parser.add_argument('--credits', help='片尾文字')
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parser.add_argument('--crossfade', type=int, default=0, help='交叉淡入淡出帧数')
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parser.add_argument('-v', '--verbose', action='store_true', help='详细输出')
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args = parser.parse_args()
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if not os.path.isdir(args.folder):
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print(f"❌ 文件夹不存在: {args.folder}")
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sys.exit(1)
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files = get_video_files(args.folder, args.sort)
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if not files:
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print(f"❌ 文件夹中没有视频文件: {args.folder}")
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sys.exit(1)
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success = compose_videos(
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files, args.output,
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fps=args.fps,
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subtitle_path=args.subtitle,
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title_text=args.title,
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credits_text=args.credits,
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crossfade=args.crossfade,
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verbose=args.verbose
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)
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sys.exit(0 if success else 1)
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if __name__ == '__main__':
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main()
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