视频文件MP4转文本文件txtpython代码实现

视频文件（MP4）转文本文件（txt）python代码实现

首先对mp4文件转换为MP3的音频文件：首先需要安装moviepy模块，可以通过 pip install moviepy进行安装，由于我以前安装过，所以显示如下图所示：

然后就是代码部分，这部分代码使用讯飞语音API实现，可以在讯飞[https://www.xfyun.cn/]注册一个免费的账号，然后选择产品服务下面的语音转写，然后进去之后再点击控制台创建应用即可。

使用总结

1、进入讯飞开放平台官网：https://www.xfyun.cn/
2、注册登录后点击产品服务下面的语音转写
3、进去之后再点击控制台创建应用，可以创建多个应用
创建完后会得到APPID和密钥（这个代码要用到），记住这个不要泄露。
4、创建完应用后新用户可以先领取50小时体验包。领取之后点击付款，付款金额是0元，然后激活自己的个人账号。
5、最后运行代码，代码只要改三处地方。倒数第二行的appid和密钥用你自己的，文件路径是音频的文件路径。

代码

MP4文件先转换为MP3音频文件

代码如下：

#导入editor包中的AudioFileClip类
from moviepy.editor import AudioFileClip
 
mp4=AudioFileClip("E:\Python\000\p1.MP4")
mp4.write_audiofile("E:\Python\000\p1.mp3")
print("导入完成")

音频文件转换为文本文件

代码示例

# -*- coding: utf-8 -*-

import base64
import hashlib
import hmac
import json
import os
import time
import re


import requests

lfasr_host = 'http://raasr.xfyun.cn/api'

# 请求的接口名
api_prepare = '/prepare'
api_upload = '/upload'
api_merge = '/merge'
api_get_progress = '/getProgress'
api_get_result = '/getResult'
# 文件分片大小10M
file_piece_sice = 10485760

# ——————————————————转写可配置参数————————————————
# 参数可在官网界面（https://doc.xfyun.cn/rest_api/语音转写.html）查看，根据需求可自行在gene_params方法里添加修改
# 转写类型
lfasr_type = 0
# 是否开启分词
has_participle = 'false'
has_seperate = 'true'
# 多候选词个数
max_alternatives = 0
# 子用户标识
suid = ''


class SliceIdGenerator:
    """slice id生成器"""

    def __init__(self):
        self.__ch = 'aaaaaaaaa`'

    def getNextSliceId(self):
        ch = self.__ch
        j = len(ch) - 1
        while j >= 0:
            cj = ch[j]
            if cj != 'z':
                ch = ch[:j]   chr(ord(cj)   1)   ch[j   1:]
                break
            else:
                ch = ch[:j]   'a'   ch[j   1:]
                j = j - 1
        self.__ch = ch
        return self.__ch


class RequestApi(object):
    def __init__(self, appid, secret_key, upload_file_path):
        self.appid = appid
        self.secret_key = secret_key
        self.upload_file_path = upload_file_path

    # 根据不同的apiname生成不同的参数,本示例中未使用全部参数您可在官网(https://doc.xfyun.cn/rest_api/语音转写.html)查看后选择适合业务场景的进行更换
    def gene_params(self, apiname, taskid=None, slice_id=None):
        appid = self.appid
        secret_key = self.secret_key
        upload_file_path = self.upload_file_path
        ts = str(int(time.time()))
        m2 = hashlib.md5()
        m2.update((appid   ts).encode('utf-8'))
        md5 = m2.hexdigest()
        md5 = bytes(md5, encoding='utf-8')
        # 以secret_key为key, 上面的md5为msg， 使用hashlib.sha1加密结果为signa
        signa = hmac.new(secret_key.encode('utf-8'), md5, hashlib.sha1).digest()
        signa = base64.b64encode(signa)
        signa = str(signa, 'utf-8')
        file_len = os.path.getsize(upload_file_path)
        file_name = os.path.basename(upload_file_path)
        param_dict = {}

        if apiname == api_prepare:
            # slice_num是指分片数量，如果您使用的音频都是较短音频也可以不分片，直接将slice_num指定为1即可
            slice_num = int(file_len / file_piece_sice)   (0 if (file_len % file_piece_sice == 0) else 1)
            param_dict['app_id'] = appid
            param_dict['signa'] = signa
            param_dict['ts'] = ts
            param_dict['file_len'] = str(file_len)
            param_dict['file_name'] = file_name
            param_dict['slice_num'] = str(slice_num)
        elif apiname == api_upload:
            param_dict['app_id'] = appid
            param_dict['signa'] = signa
            param_dict['ts'] = ts
            param_dict['task_id'] = taskid
            param_dict['slice_id'] = slice_id
        elif apiname == api_merge:
            param_dict['app_id'] = appid
            param_dict['signa'] = signa
            param_dict['ts'] = ts
            param_dict['task_id'] = taskid
            param_dict['file_name'] = file_name
        elif apiname == api_get_progress or apiname == api_get_result:
            param_dict['app_id'] = appid
            param_dict['signa'] = signa
            param_dict['ts'] = ts
            param_dict['task_id'] = taskid
        return param_dict

    # 请求和结果解析，结果中各个字段的含义可参考：https://doc.xfyun.cn/rest_api/语音转写.html
    def gene_request(self, apiname, data, files=None, headers=None):
        response = requests.post(lfasr_host   apiname, data=data, files=files, headers=headers)
        result = json.loads(response.text)
        if result["ok"] == 0:
            if apiname=='/getResult':
                results=re.findall(r"\"onebest\":\"(. ?)\",",result['data'])
                print(results)
                upload_file_path = self.upload_file_path
                with open(str(upload_file_path) ".txt", "a", encoding='utf-8') as f:
                    for i in results:
                        f.write(i)
            print("{} success:".format(apiname)   str(result))
            return result
        else:
            print("{} error:".format(apiname)   str(result))
            exit(0)
            return result

    # 预处理
    def prepare_request(self):
        return self.gene_request(apiname=api_prepare,
                                 data=self.gene_params(api_prepare))

    # 上传
    def upload_request(self, taskid, upload_file_path):
        file_object = open(upload_file_path, 'rb')
        try:
            index = 1
            sig = SliceIdGenerator()
            while True:
                content = file_object.read(file_piece_sice)
                if not content or len(content) == 0:
                    break
                files = {
                    "filename": self.gene_params(api_upload).get("slice_id"),
                    "content": content
                }
                response = self.gene_request(api_upload,
                                             data=self.gene_params(api_upload, taskid=taskid,
                                                                   slice_id=sig.getNextSliceId()),
                                             files=files)
                if response.get('ok') != 0:
                    # 上传分片失败
                    print('upload slice fail, response: '   str(response))
                    return False
                print('upload slice '   str(index)   ' success')
                index  = 1
        finally:
            'file index:'   str(file_object.tell())
            file_object.close()
        return True

    # 合并
    def merge_request(self, taskid):
        return self.gene_request(api_merge, data=self.gene_params(api_merge, taskid=taskid))

    # 获取进度
    def get_progress_request(self, taskid):
        return self.gene_request(api_get_progress, data=self.gene_params(api_get_progress, taskid=taskid))

    # 获取结果
    def get_result_request(self, taskid):
        return self.gene_request(api_get_result, data=self.gene_params(api_get_result, taskid=taskid))

    def all_api_request(self):
        # 1. 预处理
        pre_result = self.prepare_request()
        taskid = pre_result["data"]
        # 2 . 分片上传
        self.upload_request(taskid=taskid, upload_file_path=self.upload_file_path)
        # 3 . 文件合并
        self.merge_request(taskid=taskid)
        # 4 . 获取任务进度
        while True:
            # 每隔20秒获取一次任务进度
            progress = self.get_progress_request(taskid)
            progress_dic = progress
            if progress_dic['err_no'] != 0 and progress_dic['err_no'] != 26605:
                print('task error: '   progress_dic['failed'])
                return
            else:
                data = progress_dic['data']
                task_status = json.loads(data)
                if task_status['status'] == 9:
                    print('task '   taskid   ' finished')
                    break
                print('The task '   taskid   ' is in processing, task status: '   str(data))

            # 每次获取进度间隔20S
            time.sleep(20)
        # 5 . 获取结果
        self.get_result_request(taskid=taskid)


# 注意：如果出现requests模块报错："NoneType" object has no attribute 'read', 请尝试将requests模块更新到2.20.0或以上版本(本demo测试版本为2.20.0)
# 输入讯飞开放平台的appid，secret_key和待转写的音频文件路径 
#     api = RequestApi(appid="b2dbd0ba", secret_key="1224e9ce3632275402b017cf7a04ebc8", upload_file_path=r"两位数乘一位数.mp3")
    
if __name__ == '__main__':
    api = RequestApi(appid="", secret_key="", upload_file_path=r"")
    api.all_api_request()

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