MCP Video Extraction Plus

MCP Video Extraction Plus

Enables video text extraction using multiple speech recognition providers including local Whisper, JianYing/CapCut, and Bilibili Cut services. Supports video downloading, audio extraction, and automatic speech-to-text transcription with configurable providers.

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fork from MCP Video Extraction

MCP Video Extraction plus - 语音识别服务集成修改说明

概述

本次修改将项目的语音识别服务从仅支持 Whisper(本地模型) 扩展为支持三种方式:

  1. Whisper - OpenAI 的本地语音识别模型(原有)
  2. JianYing (CapCut) - 字节跳动简影/CapCut 的在线语音识别服务
  3. Bcut (B站剪辑) - 哔哩哔哩剪辑的在线语音识别服务

Overview

This update expands the project's speech recognition service from supporting only Whisper (local model) to supporting three methods:

  1. Whisper – OpenAI's local speech recognition model (original)
  2. JianYing (CapCut) – ByteDance's JianYing/CapCut online speech recognition service
  3. Bcut (Bilibili Cut) – Bilibili's online speech recognition service

新增文件

核心 ASR 模块

文件 说明
src/mcp_video_service/services/asr_data.py ASR 数据结构定义(ASRDataSeg、ASRData)
src/mcp_video_service/services/status.py ASR 任务状态枚举
src/mcp_video_service/services/base_asr.py 基础 ASR 抽象类,所有 ASR 实现的父类
src/mcp_video_service/services/jianying_asr.py 简影(CapCut)语音识别实现
src/mcp_video_service/services/bcut_asr.py B站剪辑(Bcut)语音识别实现
src/mcp_video_service/services/__init__.py Services 包初始化文件

修改的文件

1. src/mcp_video_service/services/video_service.py

主要改动:

  • 添加 ASR 提供者配置支持(asr_provider
  • 修改 __init__ 方法,支持从配置文件读取 ASR 提供者选择
  • 新增 _create_asr_instance() 方法,根据配置创建对应的 ASR 实例
  • 修改 extract_text() 方法,支持多种 ASR 提供者
    • 如果选择 Whisper,使用本地模型
    • 如果选择 JianYing 或 Bcut,调用在线 API
  • 添加导入语句,支持相对导入和绝对导入兼容

配置参数:

self.config = {
    'asr': {
        'provider': 'whisper',  # 可选: whisper, jianying, bcut
        'use_cache': False,
        'need_word_time_stamp': False,
    },
    'jianying': {
        'start_time': 0,
        'end_time': 6000,
    },
    # ... 其他配置
}

2. config.yaml

新增配置项:

# ASR(自动语音识别)提供者配置
asr:
  provider: "whisper"  # 可选: whisper, jianying, bcut
  use_cache: false
  need_word_time_stamp: false

# JianYing (CapCut) 语音识别配置
jianying:
  start_time: 0      # 音频开始时间(毫秒)
  end_time: 6000     # 音频结束时间(毫秒)

# Bcut (B站剪辑) 语音识别配置
# 暂无特殊配置,使用默认值

使用方式

1. 使用 Whisper(本地模型,默认)

from mcp_video_service.services.video_service import VideoService

service = VideoService(config_path='config.yaml')
# config.yaml 中设置: asr.provider = "whisper"

text = await service.extract_text('audio.mp3')

2. 使用 JianYing(在线服务)

# 修改 config.yaml
# asr:
#   provider: "jianying"
#   use_cache: false
#   need_word_time_stamp: false
# jianying:
#   start_time: 0
#   end_time: 6000

service = VideoService(config_path='config.yaml')
text = await service.extract_text('audio.mp3')

3. 使用 Bcut(在线服务)

# 修改 config.yaml
# asr:
#   provider: "bcut"
#   use_cache: true
#   need_word_time_stamp: false

service = VideoService(config_path='config.yaml')
text = await service.extract_text('audio.mp3')

4. 通过环境变量配置

# 使用 JianYing
export ASR_PROVIDER=jianying
export ASR_USE_CACHE=false
export JIANYING_START_TIME=0
export JIANYING_END_TIME=6000

# 使用 Bcut
export ASR_PROVIDER=bcut
export ASR_USE_CACHE=true

架构设计

类继承关系

BaseASR (抽象基类)
├── JianYingASR
├── BcutASR
└── VideoService (使用 Whisper 时直接调用 whisper.load_model)

BaseASR 的主要特性

  • 统一接口:所有 ASR 实现都继承自 BaseASR
  • 缓存支持:通过 CRC32 校验和生成缓存键
  • 速率限制:内置速率限制机制,防止 API 过载
  • 进度回调:支持异步进度回调函数
  • 错误处理:统一的错误处理和日志记录

数据结构

ASRDataSeg(分段数据)

@dataclass
class ASRDataSeg:
    text: str          # 分段文本
    start_time: float  # 开始时间(毫秒)
    end_time: float    # 结束时间(毫秒)

ASRData(完整数据)

@dataclass
class ASRData:
    text: str                    # 完整文本
    segments: List[ASRDataSeg]   # 分段列表

状态管理

ASR 任务的状态通过 ASRStatus 枚举管理:

状态 进度 说明
UPLOADING 20 上传中
SUBMITTING 40 提交中
QUERYING_RESULT 60 查询结果中
CREATING_TASK 40 创建任务中
TRANSCRIBING 60 转录中
COMPLETED 100 已完成

导入兼容性

所有新增的 ASR 模块都支持相对导入绝对导入的双重兼容:

# 相对导入(在包内使用)
from .asr_data import ASRDataSeg
from .base_asr import BaseASR

# 绝对导入(直接加载模块时使用)
from asr_data import ASRDataSeg
from base_asr import BaseASR

这确保了模块在不同的导入场景下都能正常工作。

依赖项

新增依赖

  • requests - 用于 HTTP 请求(JianYing 和 Bcut API)

现有依赖

  • yt-dlp - 视频下载
  • whisper - 本地语音识别(仅在使用 Whisper 时需要)
  • pyyaml - 配置文件解析

环境变量支持

环境变量 说明 默认值
ASR_PROVIDER ASR 提供者 whisper
ASR_USE_CACHE 是否使用缓存 false
ASR_WORD_TIME_STAMP 是否需要词级时间戳 false
JIANYING_START_TIME JianYing 音频开始时间 0
JIANYING_END_TIME JianYing 音频结束时间 6000
WHISPER_MODEL Whisper 模型大小 base
WHISPER_LANGUAGE Whisper 语言 auto

向后兼容性

本次修改完全向后兼容:

  • 默认 ASR 提供者为 whisper,保持原有行为
  • 原有的 extract_text() 接口保持不变
  • 所有新增功能都是可选的

测试验证

所有新增模块已通过以下验证:

  • ✓ Python 语法检查
  • ✓ 模块导入测试
  • ✓ 类继承关系验证
  • ✓ 配置文件解析测试

后续扩展

该架构支持轻松添加新的 ASR 提供者:

  1. 创建新类继承 BaseASR
  2. 实现 _run()_make_segments() 方法
  3. VideoService._create_asr_instance() 中添加条件分支
  4. config.yaml 中添加相应配置项

许可证

保持原项目许可证不变。

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