获得MOOC教学视频文本
获得音频
首先从以下地址下载获得视频：http://mooc1vod.stu.126.net/nos/mp4/2016/11/24/1005374032_1241ef3e8a474c9898e1e62f0268ca6c_hd.mp4?ak=7909bff134372bffca53cdc2c17adc27a4c38c6336120510aea1ae1790819de8c3092915cb74e414787263398b5d5a484f5c959cdb6ce7e3c6a3acf758b3c64d3059f726dc7bb86b92adbc3d5b34b132acf7000706a439679744c1c7146151614426afeac364f76a817da3b2623cd41e
这是一个牛顿运动定理简要回顾的视频：
利用格式工场提出其中的音轨：
语音识别
腾讯AI开放平台就注册不了：
在讯飞开放平台注册账号，并新建一个应用：
可以领取一个5小时免费语音转写的业务：
以下是官网给的一个demo：
# -*- coding: utf-8 -*-
#
# author: yanmeng2
#
# 非实时转写调用demo
import base64
import hashlib
import hmac
import json
import os
import time
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/%E8%AF%AD%E9%9F%B3%E8%BD%AC%E5%86%99.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/%E8%AF%AD%E9%9F%B3%E8%BD%AC%E5%86%99.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/%E8%AF%AD%E9%9F%B3%E8%BD%AC%E5%86%99.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:
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和待转写的文件路径
if __name__ == '__main__':
api = RequestApi(appid="你的appid", secret_key="你的secret_key", upload_file_path=r"D:/University_Study/Code/牛顿运动定理简要回顾.mp3")
api.all_api_request()
结果：
/prepare success:{'data': '9482d9d7f8bf45c3a14e1fb7fb132666', 'err_no': 0, 'failed': None, 'ok': 0}
/upload success:{'data': None, 'err_no': 0, 'failed': None, 'ok': 0}
upload slice 1 success
/merge success:{'data': None, 'err_no': 0, 'failed': None, 'ok': 0}
/getProgress success:{'data': '{"status":2,"desc":"音频合并完成"}', 'err_no': 0, 'failed': None, 'ok': 0}
The task 9482d9d7f8bf45c3a14e1fb7fb132666 is in processing, task status: {"status":2,"desc":"音频合并完成"}
/getProgress success:{'data': '{"status":3,"desc":"音频转写中"}', 'err_no': 0, 'failed': None, 'ok': 0}
The task 9482d9d7f8bf45c3a14e1fb7fb132666 is in processing, task status: {"status":3,"desc":"音频转写中"}
/getProgress success:{'data': '{"status":9,"desc":"转写结果上传完成"}', 'err_no': 0, 'failed': None, 'ok': 0}
task 9482d9d7f8bf45c3a14e1fb7fb132666 finished
/getResult success:{'data': '[{"bg":"1020","ed":"1940","onebest":"嗯","speaker":"0"},{"bg":"7270","ed":"8250","onebest":"大家好，","speaker":"0"},{"bg":"8330","ed":"12600","onebest":"这周我们进行牛顿运动定律方面的相关练习，","speaker":"0"},{"bg":"13310","ed":"16050","onebest":"牛顿运动定律是整个力学的基础，","speaker":"0"},{"bg":"16500","ed":"19180","onebest":"这一部分中所用到的研究方法，","speaker":"0"},{"bg":"19180","ed":"21840","onebest":"对于我们学习力学是非常重要的。","speaker":"0"},{"bg":"22110","ed":"25990","onebest":"首先我们对牛顿运动定律做一个简单的回顾，","speaker":"0"},{"bg":"26310","ed":"27640","onebest":"牛顿第一定律，","speaker":"0"},{"bg":"28320","ed":"29530","onebest":"任何物体","speaker":"0"},{"bg":"29530","ed":"31400","onebest":"如果没有力作用在上面，","speaker":"0"},{"bg":"31400","ed":"33550","onebest":"都将保持它原来的速度，","speaker":"0"},{"bg":"33700","ed":"35000","onebest":"原来进不去的","speaker":"0"},{"bg":"35000","ed":"35990","onebest":"依旧禁止。","speaker":"0"},{"bg":"35990","ed":"37360","onebest":"原来运动的","speaker":"0"},{"bg":"37360","ed":"39600","onebest":"将做匀速直线运动。","speaker":"0"},{"bg":"39880","ed":"42860","onebest":"也就是说牛顿第一定律告诉我们，","speaker":"0"},{"bg":"42860","ed":"46490","onebest":"物体的运动状态不需要外力来维持，","speaker":"0"},{"bg":"47080","ed":"53220","onebest":"物体天然就具有维持自己运动状态的这样一种能力或者是属性，","speaker":"0"},{"bg":"53430","ed":"59720","onebest":"这种性质就叫做惯性，因此牛顿第一定律也被称为惯性定律。","speaker":"0"},{"bg":"60560","ed":"62960","onebest":"此外根据牛顿第一定律，","speaker":"0"},{"bg":"62960","ed":"65370","onebest":"我们还可以定义一种参照系，","speaker":"0"},{"bg":"65370","ed":"67030","onebest":"叫做惯性参照系。","speaker":"0"},{"bg":"67200","ed":"71540","onebest":"所谓惯性参照系就是牛顿第一定律成立的参照系，","speaker":"0"},{"bg":"72260","ed":"73820","onebest":"在一个参照系中，","speaker":"0"},{"bg":"73850","ed":"78070","onebest":"牛顿第一定律是否成立，要通过实验的检验。","speaker":"0"},{"bg":"78590","ed":"82430","onebest":"好，那接下来呢我们看牛顿第二定律，","speaker":"0"},{"bg":"82990","ed":"84620","onebest":"牛顿第二定律呢","speaker":"0"},{"bg":"85030","ed":"90880","onebest":"告诉我们，物体一旦受到了外力，它的运动状态就会发生变化，","speaker":"0"},{"bg":"90880","ed":"94970","onebest":"所以外力是改变物体运动状态的原因，","speaker":"0"},{"bg":"94970","ed":"99140","onebest":"并且告诉我们这个物体的运动状态如何变化。","speaker":"0"},{"bg":"100230","ed":"101690","onebest":"它的表述是","speaker":"0"},{"bg":"101950","ed":"103540","onebest":"质点的加速度","speaker":"0"},{"bg":"103570","ed":"106470","onebest":"与它所受的合力的方向相同，","speaker":"0"},{"bg":"106770","ed":"108380","onebest":"加速度的大小","speaker":"0"},{"bg":"108380","ed":"110210","onebest":"与它的质量成反比，","speaker":"0"},{"bg":"110230","ed":"113610","onebest":"与它所受到的合力的大小成正比。","speaker":"0"},{"bg":"113890","ed":"115810","onebest":"通常我们也写成","speaker":"0"},{"bg":"115810","ed":"117870","onebest":" f等于ma，","speaker":"0"},{"bg":"118750","ed":"123860","onebest":"其中f是这个物体受到的合力，m是它的质量，","speaker":"0"},{"bg":"124260","ed":"126160","onebest":"是这个物体的加速度。","speaker":"0"},{"bg":"126260","ed":"131520","onebest":"在这个表达式中所出现的质量常常被称为惯性质量，","speaker":"0"},{"bg":"131980","ed":"137130","onebest":"而在万有引力定律中出现的质量，我们称之为引力质量。","speaker":"0"},{"bg":"138610","ed":"142220","onebest":"牛顿第二定律还有一种表述形式，它就是","speaker":"0"},{"bg":"142220","ed":"145210","onebest":"物体的动量对时间的变化率","speaker":"0"},{"bg":"145330","ed":"148240","onebest":"与所受到的外力成正比，","speaker":"0"},{"bg":"148310","ed":"151150","onebest":"并且发生在外力的方向上。","speaker":"0"},{"bg":"151600","ed":"153110","onebest":"数学表达式","speaker":"0"},{"bg":"153110","ed":"155810","onebest":"是f等于dpdt","speaker":"0"},{"bg":"155810","ed":"157090","onebest":"其中p","speaker":"0"},{"bg":"157090","ed":"158780","onebest":"是物体的动量，","speaker":"0"},{"bg":"158980","ed":"161900","onebest":"f是物体所受到的合力，","speaker":"0"},{"bg":"162490","ed":"163280","onebest":"啊","speaker":"0"},{"bg":"164230","ed":"165540","onebest":"牛顿第一定律","speaker":"0"},{"bg":"165540","ed":"166930","onebest":"和第二定律","speaker":"0"},{"bg":"166930","ed":"168760","onebest":"都只涉及一个物体。","speaker":"0"},{"bg":"168810","ed":"171460","onebest":"接下来我们来看牛顿第三定律，","speaker":"0"},{"bg":"171910","ed":"173720","onebest":"在牛顿第三定律中，","speaker":"0"},{"bg":"173720","ed":"177990","onebest":"我们知道物体之间的相互作用应该具有什么样的性质？","speaker":"0"},{"bg":"178500","ed":"181600","onebest":"假设有两个物体，m一和m二，","speaker":"0"},{"bg":"181910","ed":"186990","onebest":"物体一受到的二对它的作用力，我们记作f12","speaker":"0"},{"bg":"187930","ed":"188900","onebest":"同向，","speaker":"0"},{"bg":"188900","ed":"193550","onebest":"物体二受到了一对它的作用力，我们记作f21。","speaker":"0"},{"bg":"193850","ed":"196870","onebest":"牛顿第三定律告诉我们，f12","speaker":"0"},{"bg":"196940","ed":"199970","onebest":"和f21它是成对出现的，","speaker":"0"},{"bg":"199970","ed":"203740","onebest":"两者大小相等，方向相反，","speaker":"0"},{"bg":"203960","ed":"205930","onebest":"作用在一条直线上，","speaker":"0"},{"bg":"206250","ed":"212080","onebest":"那因此这一对力呢也被通常的称为作用力与反作用力。","speaker":"0"},{"bg":"213540","ed":"214970","onebest":"牛顿三定律","speaker":"0"},{"bg":"214970","ed":"220890","onebest":"它是有适用条件的，适用条件是牛顿运动定律只适用于","speaker":"0"},{"bg":"220890","ed":"222320","onebest":"惯性参照系。","speaker":"0"},{"bg":"222970","ed":"227210","onebest":"那这样我们对牛顿运动定律做了一个简短的回顾。","speaker":"0"},{"bg":"228460","ed":"234240","onebest":"接下来我们来看令牛顿运动定律解决具体问题的步骤，","speaker":"0"},{"bg":"234240","ed":"237840","onebest":"这个步骤呢对于初学者是非常有帮助的。","speaker":"0"},{"bg":"237840","ed":"238880","onebest":"我们来看一下，","speaker":"0"},{"bg":"238880","ed":"242650","onebest":"它的解题步骤是首先你要选择研究对象，","speaker":"0"},{"bg":"243250","ed":"244480","onebest":"隔离物体","speaker":"0"},{"bg":"244650","ed":"252490","onebest":"之后呢对这个物体进行受力分析，看看它都受到什么样的力，并且把这些力呢用图","speaker":"0"},{"bg":"252490","ed":"254420","onebest":"清晰的表达出来。","speaker":"0"},{"bg":"255190","ed":"262220","onebest":"接下来你要分析一下这个物体的运动，举例说它的速度，它的加速度是什么方向的？","speaker":"0"},{"bg":"262530","ed":"268740","onebest":"它受到什么样的约束等等，它的运动具有什么样的性质，它的轨道是什么样的？","speaker":"0"},{"bg":"268740","ed":"273680","onebest":"总而言之，呢你就对于他的运动的一些信息呢进行分析。","speaker":"0"},{"bg":"274870","ed":"276340","onebest":"接下来第4步，","speaker":"0"},{"bg":"276340","ed":"278480","onebest":"你就要选择一个坐标系，","speaker":"0"},{"bg":"278480","ed":"281060","onebest":"列方程求解未知量。","speaker":"0"},{"bg":"281410","ed":"282350","onebest":"最后","speaker":"0"},{"bg":"282350","ed":"283140","onebest":"我们","speaker":"0"},{"bg":"283140","ed":"286940","onebest":"要对所得的结果进行检验和讨论，","speaker":"0"},{"bg":"286940","ed":"293940","onebest":"这就是我们解题的步骤，对于初学者大家不妨按照这样的一个步骤来试一试，","speaker":"0"},{"bg":"293940","ed":"296290","onebest":"看看对你是否有所帮助。","speaker":"0"},{"bg":"296980","ed":"300190","onebest":"接下来我们就来看具体的题目。","speaker":"0"}]', 'err_no': 0, 'failed': None, 'ok': 0}
Process finished with exit code 0
分析一下结果:
bg 句子相对于本音频的起始时间，单位为ms
ed 句子相对于本音频的终止时间，单位为ms
onebest 句子内容
speaker 说话人编号，从1开始，未开启说话人分离时speaker都为0
看一下原来的Demo里面的代码，我们需要的就是这个函数返回的字典形式的result：
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:
print("{} success:".format(apiname) + str(result))
return result
else:
print("{} error:".format(apiname) + str(result))
exit(0)
return result
由于免费调用的时间仅有5小时，所以需要省着一点，先暂时把那个结果保存下来，再新建一个.py文件来改一下格式：
dic = {'data': '[{"bg":"1020","ed":"1940","onebest":"嗯","speaker":"0"},{"bg":"7270","ed":"8250","onebest":"大家好，","speaker":"0"},{"bg":"8330","ed":"12600","onebest":"这周我们进行牛顿运动定律方面的相关练习，","speaker":"0"},{"bg":"13310","ed":"16050","onebest":"牛顿运动定律是整个力学的基础，","speaker":"0"},{"bg":"16500","ed":"19180","onebest":"这一部分中所用到的研究方法，","speaker":"0"},{"bg":"19180","ed":"21840","onebest":"对于我们学习力学是非常重要的。","speaker":"0"},{"bg":"22110","ed":"25990","onebest":"首先我们对牛顿运动定律做一个简单的回顾，","speaker":"0"},{"bg":"26310","ed":"27640","onebest":"牛顿第一定律，","speaker":"0"},{"bg":"28320","ed":"29530","onebest":"任何物体","speaker":"0"},{"bg":"29530","ed":"31400","onebest":"如果没有力作用在上面，","speaker":"0"},{"bg":"31400","ed":"33550","onebest":"都将保持它原来的速度，","speaker":"0"},{"bg":"33700","ed":"35000","onebest":"原来进不去的","speaker":"0"},{"bg":"35000","ed":"35990","onebest":"依旧禁止。","speaker":"0"},{"bg":"35990","ed":"37360","onebest":"原来运动的","speaker":"0"},{"bg":"37360","ed":"39600","onebest":"将做匀速直线运动。","speaker":"0"},{"bg":"39880","ed":"42860","onebest":"也就是说牛顿第一定律告诉我们，","speaker":"0"},{"bg":"42860","ed":"46490","onebest":"物体的运动状态不需要外力来维持，","speaker":"0"},{"bg":"47080","ed":"53220","onebest":"物体天然就具有维持自己运动状态的这样一种能力或者是属性，","speaker":"0"},{"bg":"53430","ed":"59720","onebest":"这种性质就叫做惯性，因此牛顿第一定律也被称为惯性定律。","speaker":"0"},{"bg":"60560","ed":"62960","onebest":"此外根据牛顿第一定律，","speaker":"0"},{"bg":"62960","ed":"65370","onebest":"我们还可以定义一种参照系，","speaker":"0"},{"bg":"65370","ed":"67030","onebest":"叫做惯性参照系。","speaker":"0"},{"bg":"67200","ed":"71540","onebest":"所谓惯性参照系就是牛顿第一定律成立的参照系，","speaker":"0"},{"bg":"72260","ed":"73820","onebest":"在一个参照系中，","speaker":"0"},{"bg":"73850","ed":"78070","onebest":"牛顿第一定律是否成立，要通过实验的检验。","speaker":"0"},{"bg":"78590","ed":"82430","onebest":"好，那接下来呢我们看牛顿第二定律，","speaker":"0"},{"bg":"82990","ed":"84620","onebest":"牛顿第二定律呢","speaker":"0"},{"bg":"85030","ed":"90880","onebest":"告诉我们，物体一旦受到了外力，它的运动状态就会发生变化，","speaker":"0"},{"bg":"90880","ed":"94970","onebest":"所以外力是改变物体运动状态的原因，","speaker":"0"},{"bg":"94970","ed":"99140","onebest":"并且告诉我们这个物体的运动状态如何变化。","speaker":"0"},{"bg":"100230","ed":"101690","onebest":"它的表述是","speaker":"0"},{"bg":"101950","ed":"103540","onebest":"质点的加速度","speaker":"0"},{"bg":"103570","ed":"106470","onebest":"与它所受的合力的方向相同，","speaker":"0"},{"bg":"106770","ed":"108380","onebest":"加速度的大小","speaker":"0"},{"bg":"108380","ed":"110210","onebest":"与它的质量成反比，","speaker":"0"},{"bg":"110230","ed":"113610","onebest":"与它所受到的合力的大小成正比。","speaker":"0"},{"bg":"113890","ed":"115810","onebest":"通常我们也写成","speaker":"0"},{"bg":"115810","ed":"117870","onebest":" f等于ma，","speaker":"0"},{"bg":"118750","ed":"123860","onebest":"其中f是这个物体受到的合力，m是它的质量，","speaker":"0"},{"bg":"124260","ed":"126160","onebest":"是这个物体的加速度。","speaker":"0"},{"bg":"126260","ed":"131520","onebest":"在这个表达式中所出现的质量常常被称为惯性质量，","speaker":"0"},{"bg":"131980","ed":"137130","onebest":"而在万有引力定律中出现的质量，我们称之为引力质量。","speaker":"0"},{"bg":"138610","ed":"142220","onebest":"牛顿第二定律还有一种表述形式，它就是","speaker":"0"},{"bg":"142220","ed":"145210","onebest":"物体的动量对时间的变化率","speaker":"0"},{"bg":"145330","ed":"148240","onebest":"与所受到的外力成正比，","speaker":"0"},{"bg":"148310","ed":"151150","onebest":"并且发生在外力的方向上。","speaker":"0"},{"bg":"151600","ed":"153110","onebest":"数学表达式","speaker":"0"},{"bg":"153110","ed":"155810","onebest":"是f等于dpdt","speaker":"0"},{"bg":"155810","ed":"157090","onebest":"其中p","speaker":"0"},{"bg":"157090","ed":"158780","onebest":"是物体的动量，","speaker":"0"},{"bg":"158980","ed":"161900","onebest":"f是物体所受到的合力，","speaker":"0"},{"bg":"162490","ed":"163280","onebest":"啊","speaker":"0"},{"bg":"164230","ed":"165540","onebest":"牛顿第一定律","speaker":"0"},{"bg":"165540","ed":"166930","onebest":"和第二定律","speaker":"0"},{"bg":"166930","ed":"168760","onebest":"都只涉及一个物体。","speaker":"0"},{"bg":"168810","ed":"171460","onebest":"接下来我们来看牛顿第三定律，","speaker":"0"},{"bg":"171910","ed":"173720","onebest":"在牛顿第三定律中，","speaker":"0"},{"bg":"173720","ed":"177990","onebest":"我们知道物体之间的相互作用应该具有什么样的性质？","speaker":"0"},{"bg":"178500","ed":"181600","onebest":"假设有两个物体，m一和m二，","speaker":"0"},{"bg":"181910","ed":"186990","onebest":"物体一受到的二对它的作用力，我们记作f12","speaker":"0"},{"bg":"187930","ed":"188900","onebest":"同向，","speaker":"0"},{"bg":"188900","ed":"193550","onebest":"物体二受到了一对它的作用力，我们记作f21。","speaker":"0"},{"bg":"193850","ed":"196870","onebest":"牛顿第三定律告诉我们，f12","speaker":"0"},{"bg":"196940","ed":"199970","onebest":"和f21它是成对出现的，","speaker":"0"},{"bg":"199970","ed":"203740","onebest":"两者大小相等，方向相反，","speaker":"0"},{"bg":"203960","ed":"205930","onebest":"作用在一条直线上，","speaker":"0"},{"bg":"206250","ed":"212080","onebest":"那因此这一对力呢也被通常的称为作用力与反作用力。","speaker":"0"},{"bg":"213540","ed":"214970","onebest":"牛顿三定律","speaker":"0"},{"bg":"214970","ed":"220890","onebest":"它是有适用条件的，适用条件是牛顿运动定律只适用于","speaker":"0"},{"bg":"220890","ed":"222320","onebest":"惯性参照系。","speaker":"0"},{"bg":"222970","ed":"227210","onebest":"那这样我们对牛顿运动定律做了一个简短的回顾。","speaker":"0"},{"bg":"228460","ed":"234240","onebest":"接下来我们来看令牛顿运动定律解决具体问题的步骤，","speaker":"0"},{"bg":"234240","ed":"237840","onebest":"这个步骤呢对于初学者是非常有帮助的。","speaker":"0"},{"bg":"237840","ed":"238880","onebest":"我们来看一下，","speaker":"0"},{"bg":"238880","ed":"242650","onebest":"它的解题步骤是首先你要选择研究对象，","speaker":"0"},{"bg":"243250","ed":"244480","onebest":"隔离物体","speaker":"0"},{"bg":"244650","ed":"252490","onebest":"之后呢对这个物体进行受力分析，看看它都受到什么样的力，并且把这些力呢用图","speaker":"0"},{"bg":"252490","ed":"254420","onebest":"清晰的表达出来。","speaker":"0"},{"bg":"255190","ed":"262220","onebest":"接下来你要分析一下这个物体的运动，举例说它的速度，它的加速度是什么方向的？","speaker":"0"},{"bg":"262530","ed":"268740","onebest":"它受到什么样的约束等等，它的运动具有什么样的性质，它的轨道是什么样的？","speaker":"0"},{"bg":"268740","ed":"273680","onebest":"总而言之，呢你就对于他的运动的一些信息呢进行分析。","speaker":"0"},{"bg":"274870","ed":"276340","onebest":"接下来第4步，","speaker":"0"},{"bg":"276340","ed":"278480","onebest":"你就要选择一个坐标系，","speaker":"0"},{"bg":"278480","ed":"281060","onebest":"列方程求解未知量。","speaker":"0"},{"bg":"281410","ed":"282350","onebest":"最后","speaker":"0"},{"bg":"282350","ed":"283140","onebest":"我们","speaker":"0"},{"bg":"283140","ed":"286940","onebest":"要对所得的结果进行检验和讨论，","speaker":"0"},{"bg":"286940","ed":"293940","onebest":"这就是我们解题的步骤，对于初学者大家不妨按照这样的一个步骤来试一试，","speaker":"0"},{"bg":"293940","ed":"296290","onebest":"看看对你是否有所帮助。","speaker":"0"},{"bg":"296980","ed":"300190","onebest":"接下来我们就来看具体的题目。","speaker":"0"}]', 'err_no': 0, 'failed': None, 'ok': 0}
list = dic['data']
print(list[1])
打印出来的结果是：
{
而不是希望的：
{"bg":"1020","ed":"1940","onebest":"嗯","speaker":"0"}
问题分析：
dic1 = {"a":"1"}
dic2 = {"b":"2"}
dic = [dic1, dic2]
dic3 = {'data':dic}
print(str(dic))
print(dic3['data'][0])
print(dic3['data'][0]["a"])
dic4 = {'data':'[{"a":"1"},{"b":"2"}]'}
print(dic4['data'][1])
结果：
[{'a': '1'}, {'b': '2'}]
{'a': '1'}
1
{
再看看Demo返回的结果形如：
"data":"[{\"bg\":\"0\",\"ed\":\"4950\",\"onebest\":\"科大讯飞是中国的智能语音技术提供商。\",\"speaker\":\"0\"}]"
感觉加转义字符\就是为了方便打印的，不像是可以利用索引查询的，这里决定直接利用正则化Re库
改一下原来的Demo部分代码，看看返回的result格式：
# 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/%E8%AF%AD%E9%9F%B3%E8%BD%AC%E5%86%99.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:
print("{} success:".format(apiname) + str(result))
if apiname == api_get_result:
parse_func1(str(result['data']))
parse_func2(result['data'])
return result
else:
print("{} error:".format(apiname) + str(result))
exit(0)
return result
def parse_func1(list):
reg = r'{.*?}'
match = re.findall(reg, list)
for item in match:
tmpl = '开始时间：{}ms 结束时间：{}ms 内容：{}'
re_begin = r'"bg":"\d*"'
re_end = r'"ed":"\d*"'
re_content = r'"onebest":".*?"'
begin = int(re.search(re_begin, item).group(0).replace('"bg":', '').replace('"', ''))
end = int(re.search(re_end, item).group(0).replace('"ed":', '').replace('"', ''))
content = re.search(re_content, item).group(0).replace('"onebest":', '').replace('"', '')
sentence = tmpl.format(begin, end, content)
print(sentence)
def parse_func2(dict):
print(dict)
print(dict[1])
结果：
开始时间：1020ms 结束时间：1940ms 内容：嗯
开始时间：7270ms 结束时间：8250ms 内容：大家好，
开始时间：8330ms 结束时间：12600ms 内容：这周我们进行牛顿运动定律方面的相关练习，
开始时间：13310ms 结束时间：16050ms 内容：牛顿运动定律是整个力学的基础，
开始时间：16500ms 结束时间：19180ms 内容：这一部分中所用到的研究方法，
开始时间：19180ms 结束时间：21840ms 内容：对于我们学习力学是非常重要的。
开始时间：22110ms 结束时间：25990ms 内容：首先我们对牛顿运动定律做一个简单的回顾，
开始时间：26310ms 结束时间：27640ms 内容：牛顿第一定律，
开始时间：28320ms 结束时间：29530ms 内容：任何物体
开始时间：29530ms 结束时间：31400ms 内容：如果没有力作用在上面，
开始时间：31400ms 结束时间：33550ms 内容：都将保持它原来的速度，
开始时间：33700ms 结束时间：35000ms 内容：原来进不去的
开始时间：35000ms 结束时间：35990ms 内容：依旧禁止。
开始时间：35990ms 结束时间：37360ms 内容：原来运动的
开始时间：37360ms 结束时间：39600ms 内容：将做匀速直线运动。
开始时间：39880ms 结束时间：42860ms 内容：也就是说牛顿第一定律告诉我们，
开始时间：42860ms 结束时间：46490ms 内容：物体的运动状态不需要外力来维持，
开始时间：47080ms 结束时间：53220ms 内容：物体天然就具有维持自己运动状态的这样一种能力或者是属性，
开始时间：53430ms 结束时间：59720ms 内容：这种性质就叫做惯性，因此牛顿第一定律也被称为惯性定律。
开始时间：60560ms 结束时间：62960ms 内容：此外根据牛顿第一定律，
开始时间：62960ms 结束时间：65370ms 内容：我们还可以定义一种参照系，
开始时间：65370ms 结束时间：67030ms 内容：叫做惯性参照系。
开始时间：67200ms 结束时间：71540ms 内容：所谓惯性参照系就是牛顿第一定律成立的参照系，
开始时间：72260ms 结束时间：73820ms 内容：在一个参照系中，
开始时间：73850ms 结束时间：78070ms 内容：牛顿第一定律是否成立，要通过实验的检验。
开始时间：78590ms 结束时间：82430ms 内容：好，那接下来呢我们看牛顿第二定律，
开始时间：82990ms 结束时间：84620ms 内容：牛顿第二定律呢
开始时间：85030ms 结束时间：90880ms 内容：告诉我们，物体一旦受到了外力，它的运动状态就会发生变化，
开始时间：90880ms 结束时间：94970ms 内容：所以外力是改变物体运动状态的原因，
开始时间：94970ms 结束时间：99140ms 内容：并且告诉我们这个物体的运动状态如何变化。
开始时间：100230ms 结束时间：101690ms 内容：它的表述是
开始时间：101950ms 结束时间：103540ms 内容：质点的加速度
开始时间：103570ms 结束时间：106470ms 内容：与它所受的合力的方向相同，
开始时间：106770ms 结束时间：108380ms 内容：加速度的大小
开始时间：108380ms 结束时间：110210ms 内容：与它的质量成反比，
开始时间：110230ms 结束时间：113610ms 内容：与它所受到的合力的大小成正比。
开始时间：113890ms 结束时间：115810ms 内容：通常我们也写成
开始时间：115810ms 结束时间：117870ms 内容： f等于ma，
开始时间：118750ms 结束时间：123860ms 内容：其中f是这个物体受到的合力，m是它的质量，
开始时间：124260ms 结束时间：126160ms 内容：是这个物体的加速度。
开始时间：126260ms 结束时间：131520ms 内容：在这个表达式中所出现的质量常常被称为惯性质量，
开始时间：131980ms 结束时间：137130ms 内容：而在万有引力定律中出现的质量，我们称之为引力质量。
开始时间：138610ms 结束时间：142220ms 内容：牛顿第二定律还有一种表述形式，它就是
开始时间：142220ms 结束时间：145210ms 内容：物体的动量对时间的变化率
开始时间：145330ms 结束时间：148240ms 内容：与所受到的外力成正比，
开始时间：148310ms 结束时间：151150ms 内容：并且发生在外力的方向上。
开始时间：151600ms 结束时间：153110ms 内容：数学表达式
开始时间：153110ms 结束时间：155810ms 内容：是f等于dpdt
开始时间：155810ms 结束时间：157090ms 内容：其中p
开始时间：157090ms 结束时间：158780ms 内容：是物体的动量，
开始时间：158980ms 结束时间：161900ms 内容：f是物体所受到的合力，
开始时间：162490ms 结束时间：163280ms 内容：啊
开始时间：164230ms 结束时间：165540ms 内容：牛顿第一定律
开始时间：165540ms 结束时间：166930ms 内容：和第二定律
开始时间：166930ms 结束时间：168760ms 内容：都只涉及一个物体。
开始时间：168810ms 结束时间：171460ms 内容：接下来我们来看牛顿第三定律，
开始时间：171910ms 结束时间：173720ms 内容：在牛顿第三定律中，
开始时间：173720ms 结束时间：177990ms 内容：我们知道物体之间的相互作用应该具有什么样的性质？
开始时间：178500ms 结束时间：181600ms 内容：假设有两个物体，m一和m二，
开始时间：181910ms 结束时间：186990ms 内容：物体一受到的二对它的作用力，我们记作f12
开始时间：187930ms 结束时间：188900ms 内容：同向，
开始时间：188900ms 结束时间：193550ms 内容：物体二受到了一对它的作用力，我们记作f21。
开始时间：193850ms 结束时间：196870ms 内容：牛顿第三定律告诉我们，f12
开始时间：196940ms 结束时间：199970ms 内容：和f21它是成对出现的，
开始时间：199970ms 结束时间：203740ms 内容：两者大小相等，方向相反，
开始时间：203960ms 结束时间：205930ms 内容：作用在一条直线上，
开始时间：206250ms 结束时间：212080ms 内容：那因此这一对力呢也被通常的称为作用力与反作用力。
开始时间：213540ms 结束时间：214970ms 内容：牛顿三定律
开始时间：214970ms 结束时间：220890ms 内容：它是有适用条件的，适用条件是牛顿运动定律只适用于
开始时间：220890ms 结束时间：222320ms 内容：惯性参照系。
开始时间：222970ms 结束时间：227210ms 内容：那这样我们对牛顿运动定律做了一个简短的回顾。
开始时间：228460ms 结束时间：234240ms 内容：接下来我们来看令牛顿运动定律解决具体问题的步骤，
开始时间：234240ms 结束时间：237840ms 内容：这个步骤呢对于初学者是非常有帮助的。
开始时间：237840ms 结束时间：238880ms 内容：我们来看一下，
开始时间：238880ms 结束时间：242650ms 内容：它的解题步骤是首先你要选择研究对象，
开始时间：243250ms 结束时间：244480ms 内容：隔离物体
开始时间：244650ms 结束时间：252490ms 内容：之后呢对这个物体进行受力分析，看看它都受到什么样的力，并且把这些力呢用图
开始时间：252490ms 结束时间：254420ms 内容：清晰的表达出来。
开始时间：255190ms 结束时间：262220ms 内容：接下来你要分析一下这个物体的运动，举例说它的速度，它的加速度是什么方向的？
开始时间：262530ms 结束时间：268740ms 内容：它受到什么样的约束等等，它的运动具有什么样的性质，它的轨道是什么样的？
开始时间：268740ms 结束时间：273680ms 内容：总而言之，呢你就对于他的运动的一些信息呢进行分析。
开始时间：274870ms 结束时间：276340ms 内容：接下来第4步，
开始时间：276340ms 结束时间：278480ms 内容：你就要选择一个坐标系，
开始时间：278480ms 结束时间：281060ms 内容：列方程求解未知量。
开始时间：281410ms 结束时间：282350ms 内容：最后
开始时间：282350ms 结束时间：283140ms 内容：我们
开始时间：283140ms 结束时间：286940ms 内容：要对所得的结果进行检验和讨论，
开始时间：286940ms 结束时间：293940ms 内容：这就是我们解题的步骤，对于初学者大家不妨按照这样的一个步骤来试一试，
开始时间：293940ms 结束时间：296290ms 内容：看看对你是否有所帮助。
开始时间：296980ms 结束时间：300190ms 内容：接下来我们就来看具体的题目。
和：
{
所以可以利用Re库对讯飞API返回的result结果进行解析操作，完整代码如下：
# -*- coding: utf-8 -*-
#
# author: yanmeng2
#
# 非实时转写调用demo
import re # 注意加上这个库
import base64
import hashlib
import hmac
import json
import os
import time
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/%E8%AF%AD%E9%9F%B3%E8%BD%AC%E5%86%99.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/%E8%AF%AD%E9%9F%B3%E8%BD%AC%E5%86%99.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/%E8%AF%AD%E9%9F%B3%E8%BD%AC%E5%86%99.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:
print("{} success:".format(apiname) + str(result))
if apiname == api_get_result:
parse_func1(str(result['data']))
parse_func2(result['data'])
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)
def parse_func1(list):
reg = r'{.*?}'
match = re.findall(reg, list)
for item in match:
tmpl = '开始时间：{}ms 结束时间：{}ms 内容：{}'
re_begin = r'"bg":"\d*"'
re_end = r'"ed":"\d*"'
re_content = r'"onebest":".*?"'
begin = int(re.search(re_begin, item).group(0).replace('"bg":', '').replace('"', ''))
end = int(re.search(re_end, item).group(0).replace('"ed":', '').replace('"', ''))
content = re.search(re_content, item).group(0).replace('"onebest":', '').replace('"', '')
sentence = tmpl.format(begin, end, content)
print(sentence)
def parse_func2(dict):
print(dict)
print(dict[1])
# 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和待转写的文件路径
if __name__ == '__main__':
api = RequestApi(appid="yours", secret_key="yours", upload_file_path=r"D:/University_Study/Code/牛顿运动定理简要回顾.mp3")
api.all_api_request()
结果：
/prepare success:{'data': 'eb14b19946ac405ca3eae6f7693aae7d', 'err_no': 0, 'failed': None, 'ok': 0}
/upload success:{'data': None, 'err_no': 0, 'failed': None, 'ok': 0}
upload slice 1 success
/merge success:{'data': None, 'err_no': 0, 'failed': None, 'ok': 0}
/getProgress success:{'data': '{"status":2,"desc":"音频合并完成"}', 'err_no': 0, 'failed': None, 'ok': 0}
The task eb14b19946ac405ca3eae6f7693aae7d is in processing, task status: {"status":2,"desc":"音频合并完成"}
/getProgress success:{'data': '{"status":9,"desc":"转写结果上传完成"}', 'err_no': 0, 'failed': None, 'ok': 0}
task eb14b19946ac405ca3eae6f7693aae7d finished
/getResult success:{'data': '[{"bg":"1020","ed":"1940","onebest":"嗯","speaker":"0"},{"bg":"7270","ed":"8250","onebest":"大家好，","speaker":"0"},{"bg":"8330","ed":"12600","onebest":"这周我们进行牛顿运动定律方面的相关练习，","speaker":"0"},{"bg":"13310","ed":"16050","onebest":"牛顿运动定律是整个力学的基础，","speaker":"0"},{"bg":"16500","ed":"19180","onebest":"这一部分中所用到的研究方法，","speaker":"0"},{"bg":"19180","ed":"21840","onebest":"对于我们学习力学是非常重要的。","speaker":"0"},{"bg":"22110","ed":"25990","onebest":"首先我们对牛顿运动定律做一个简单的回顾，","speaker":"0"},{"bg":"26310","ed":"27640","onebest":"牛顿第一定律，","speaker":"0"},{"bg":"28320","ed":"29530","onebest":"任何物体","speaker":"0"},{"bg":"29530","ed":"31400","onebest":"如果没有力作用在上面，","speaker":"0"},{"bg":"31400","ed":"33550","onebest":"都将保持它原来的速度，","speaker":"0"},{"bg":"33700","ed":"35000","onebest":"原来进不去的","speaker":"0"},{"bg":"35000","ed":"35990","onebest":"依旧禁止。","speaker":"0"},{"bg":"35990","ed":"37360","onebest":"原来运动的","speaker":"0"},{"bg":"37360","ed":"39600","onebest":"将做匀速直线运动。","speaker":"0"},{"bg":"39880","ed":"42860","onebest":"也就是说牛顿第一定律告诉我们，","speaker":"0"},{"bg":"42860","ed":"46490","onebest":"物体的运动状态不需要外力来维持，","speaker":"0"},{"bg":"47080","ed":"53220","onebest":"物体天然就具有维持自己运动状态的这样一种能力或者是属性，","speaker":"0"},{"bg":"53430","ed":"59720","onebest":"这种性质就叫做惯性，因此牛顿第一定律也被称为惯性定律。","speaker":"0"},{"bg":"60560","ed":"62960","onebest":"此外根据牛顿第一定律，","speaker":"0"},{"bg":"62960","ed":"65370","onebest":"我们还可以定义一种参照系，","speaker":"0"},{"bg":"65370","ed":"67030","onebest":"叫做惯性参照系。","speaker":"0"},{"bg":"67200","ed":"71540","onebest":"所谓惯性参照系就是牛顿第一定律成立的参照系，","speaker":"0"},{"bg":"72260","ed":"73820","onebest":"在一个参照系中，","speaker":"0"},{"bg":"73850","ed":"78070","onebest":"牛顿第一定律是否成立，要通过实验的检验。","speaker":"0"},{"bg":"78590","ed":"82430","onebest":"好，那接下来呢我们看牛顿第二定律，","speaker":"0"},{"bg":"82990","ed":"84620","onebest":"牛顿第二定律呢","speaker":"0"},{"bg":"85030","ed":"90880","onebest":"告诉我们，物体一旦受到了外力，它的运动状态就会发生变化，","speaker":"0"},{"bg":"90880","ed":"94970","onebest":"所以外力是改变物体运动状态的原因，","speaker":"0"},{"bg":"94970","ed":"99140","onebest":"并且告诉我们这个物体的运动状态如何变化。","speaker":"0"},{"bg":"100230","ed":"101690","onebest":"它的表述是","speaker":"0"},{"bg":"101950","ed":"103540","onebest":"质点的加速度","speaker":"0"},{"bg":"103570","ed":"106470","onebest":"与它所受的合力的方向相同，","speaker":"0"},{"bg":"106770","ed":"108380","onebest":"加速度的大小","speaker":"0"},{"bg":"108380","ed":"110210","onebest":"与它的质量成反比，","speaker":"0"},{"bg":"110230","ed":"113610","onebest":"与它所受到的合力的大小成正比。","speaker":"0"},{"bg":"113890","ed":"115810","onebest":"通常我们也写成","speaker":"0"},{"bg":"115810","ed":"117870","onebest":" f等于ma，","speaker":"0"},{"bg":"118750","ed":"123860","onebest":"其中f是这个物体受到的合力，m是它的质量，","speaker":"0"},{"bg":"124260","ed":"126160","onebest":"是这个物体的加速度。","speaker":"0"},{"bg":"126260","ed":"131520","onebest":"在这个表达式中所出现的质量常常被称为惯性质量，","speaker":"0"},{"bg":"131980","ed":"137130","onebest":"而在万有引力定律中出现的质量，我们称之为引力质量。","speaker":"0"},{"bg":"138610","ed":"142220","onebest":"牛顿第二定律还有一种表述形式，它就是","speaker":"0"},{"bg":"142220","ed":"145210","onebest":"物体的动量对时间的变化率","speaker":"0"},{"bg":"145330","ed":"148240","onebest":"与所受到的外力成正比，","speaker":"0"},{"bg":"148310","ed":"151150","onebest":"并且发生在外力的方向上。","speaker":"0"},{"bg":"151600","ed":"153110","onebest":"数学表达式","speaker":"0"},{"bg":"153110","ed":"155810","onebest":"是f等于dpdt","speaker":"0"},{"bg":"155810","ed":"157090","onebest":"其中p","speaker":"0"},{"bg":"157090","ed":"158780","onebest":"是物体的动量，","speaker":"0"},{"bg":"158980","ed":"161900","onebest":"f是物体所受到的合力，","speaker":"0"},{"bg":"162490","ed":"163280","onebest":"啊","speaker":"0"},{"bg":"164230","ed":"165540","onebest":"牛顿第一定律","speaker":"0"},{"bg":"165540","ed":"166930","onebest":"和第二定律","speaker":"0"},{"bg":"166930","ed":"168760","onebest":"都只涉及一个物体。","speaker":"0"},{"bg":"168810","ed":"171460","onebest":"接下来我们来看牛顿第三定律，","speaker":"0"},{"bg":"171910","ed":"173720","onebest":"在牛顿第三定律中，","speaker":"0"},{"bg":"173720","ed":"177990","onebest":"我们知道物体之间的相互作用应该具有什么样的性质？","speaker":"0"},{"bg":"178500","ed":"181600","onebest":"假设有两个物体，m一和m二，","speaker":"0"},{"bg":"181910","ed":"186990","onebest":"物体一受到的二对它的作用力，我们记作f12","speaker":"0"},{"bg":"187930","ed":"188900","onebest":"同向，","speaker":"0"},{"bg":"188900","ed":"193550","onebest":"物体二受到了一对它的作用力，我们记作f21。","speaker":"0"},{"bg":"193850","ed":"196870","onebest":"牛顿第三定律告诉我们，f12","speaker":"0"},{"bg":"196940","ed":"199970","onebest":"和f21它是成对出现的，","speaker":"0"},{"bg":"199970","ed":"203740","onebest":"两者大小相等，方向相反，","speaker":"0"},{"bg":"203960","ed":"205930","onebest":"作用在一条直线上，","speaker":"0"},{"bg":"206250","ed":"212080","onebest":"那因此这一对力呢也被通常的称为作用力与反作用力。","speaker":"0"},{"bg":"213540","ed":"214970","onebest":"牛顿三定律","speaker":"0"},{"bg":"214970","ed":"220890","onebest":"它是有适用条件的，适用条件是牛顿运动定律只适用于","speaker":"0"},{"bg":"220890","ed":"222320","onebest":"惯性参照系。","speaker":"0"},{"bg":"222970","ed":"227210","onebest":"那这样我们对牛顿运动定律做了一个简短的回顾。","speaker":"0"},{"bg":"228460","ed":"234240","onebest":"接下来我们来看令牛顿运动定律解决具体问题的步骤，","speaker":"0"},{"bg":"234240","ed":"237840","onebest":"这个步骤呢对于初学者是非常有帮助的。","speaker":"0"},{"bg":"237840","ed":"238880","onebest":"我们来看一下，","speaker":"0"},{"bg":"238880","ed":"242650","onebest":"它的解题步骤是首先你要选择研究对象，","speaker":"0"},{"bg":"243250","ed":"244480","onebest":"隔离物体","speaker":"0"},{"bg":"244650","ed":"252490","onebest":"之后呢对这个物体进行受力分析，看看它都受到什么样的力，并且把这些力呢用图","speaker":"0"},{"bg":"252490","ed":"254420","onebest":"清晰的表达出来。","speaker":"0"},{"bg":"255190","ed":"262220","onebest":"接下来你要分析一下这个物体的运动，举例说它的速度，它的加速度是什么方向的？","speaker":"0"},{"bg":"262530","ed":"268740","onebest":"它受到什么样的约束等等，它的运动具有什么样的性质，它的轨道是什么样的？","speaker":"0"},{"bg":"268740","ed":"273680","onebest":"总而言之，呢你就对于他的运动的一些信息呢进行分析。","speaker":"0"},{"bg":"274870","ed":"276340","onebest":"接下来第4步，","speaker":"0"},{"bg":"276340","ed":"278480","onebest":"你就要选择一个坐标系，","speaker":"0"},{"bg":"278480","ed":"281060","onebest":"列方程求解未知量。","speaker":"0"},{"bg":"281410","ed":"282350","onebest":"最后","speaker":"0"},{"bg":"282350","ed":"283140","onebest":"我们","speaker":"0"},{"bg":"283140","ed":"286940","onebest":"要对所得的结果进行检验和讨论，","speaker":"0"},{"bg":"286940","ed":"293940","onebest":"这就是我们解题的步骤，对于初学者大家不妨按照这样的一个步骤来试一试，","speaker":"0"},{"bg":"293940","ed":"296290","onebest":"看看对你是否有所帮助。","speaker":"0"},{"bg":"296980","ed":"300190","onebest":"接下来我们就来看具体的题目。","speaker":"0"}]', 'err_no': 0, 'failed': None, 'ok': 0}
开始时间：1020ms 结束时间：1940ms 内容：嗯
开始时间：7270ms 结束时间：8250ms 内容：大家好，
开始时间：8330ms 结束时间：12600ms 内容：这周我们进行牛顿运动定律方面的相关练习，
开始时间：13310ms 结束时间：16050ms 内容：牛顿运动定律是整个力学的基础，
开始时间：16500ms 结束时间：19180ms 内容：这一部分中所用到的研究方法，
开始时间：19180ms 结束时间：21840ms 内容：对于我们学习力学是非常重要的。
开始时间：22110ms 结束时间：25990ms 内容：首先我们对牛顿运动定律做一个简单的回顾，
开始时间：26310ms 结束时间：27640ms 内容：牛顿第一定律，
开始时间：28320ms 结束时间：29530ms 内容：任何物体
开始时间：29530ms 结束时间：31400ms 内容：如果没有力作用在上面，
开始时间：31400ms 结束时间：33550ms 内容：都将保持它原来的速度，
开始时间：33700ms 结束时间：35000ms 内容：原来进不去的
开始时间：35000ms 结束时间：35990ms 内容：依旧禁止。
开始时间：35990ms 结束时间：37360ms 内容：原来运动的
开始时间：37360ms 结束时间：39600ms 内容：将做匀速直线运动。
开始时间：39880ms 结束时间：42860ms 内容：也就是说牛顿第一定律告诉我们，
开始时间：42860ms 结束时间：46490ms 内容：物体的运动状态不需要外力来维持，
开始时间：47080ms 结束时间：53220ms 内容：物体天然就具有维持自己运动状态的这样一种能力或者是属性，
开始时间：53430ms 结束时间：59720ms 内容：这种性质就叫做惯性，因此牛顿第一定律也被称为惯性定律。
开始时间：60560ms 结束时间：62960ms 内容：此外根据牛顿第一定律，
开始时间：62960ms 结束时间：65370ms 内容：我们还可以定义一种参照系，
开始时间：65370ms 结束时间：67030ms 内容：叫做惯性参照系。
开始时间：67200ms 结束时间：71540ms 内容：所谓惯性参照系就是牛顿第一定律成立的参照系，
开始时间：72260ms 结束时间：73820ms 内容：在一个参照系中，
开始时间：73850ms 结束时间：78070ms 内容：牛顿第一定律是否成立，要通过实验的检验。
开始时间：78590ms 结束时间：82430ms 内容：好，那接下来呢我们看牛顿第二定律，
开始时间：82990ms 结束时间：84620ms 内容：牛顿第二定律呢
开始时间：85030ms 结束时间：90880ms 内容：告诉我们，物体一旦受到了外力，它的运动状态就会发生变化，
开始时间：90880ms 结束时间：94970ms 内容：所以外力是改变物体运动状态的原因，
开始时间：94970ms 结束时间：99140ms 内容：并且告诉我们这个物体的运动状态如何变化。
开始时间：100230ms 结束时间：101690ms 内容：它的表述是
开始时间：101950ms 结束时间：103540ms 内容：质点的加速度
开始时间：103570ms 结束时间：106470ms 内容：与它所受的合力的方向相同，
开始时间：106770ms 结束时间：108380ms 内容：加速度的大小
开始时间：108380ms 结束时间：110210ms 内容：与它的质量成反比，
开始时间：110230ms 结束时间：113610ms 内容：与它所受到的合力的大小成正比。
开始时间：113890ms 结束时间：115810ms 内容：通常我们也写成
开始时间：115810ms 结束时间：117870ms 内容： f等于ma，
开始时间：118750ms 结束时间：123860ms 内容：其中f是这个物体受到的合力，m是它的质量，
开始时间：124260ms 结束时间：126160ms 内容：是这个物体的加速度。
开始时间：126260ms 结束时间：131520ms 内容：在这个表达式中所出现的质量常常被称为惯性质量，
开始时间：131980ms 结束时间：137130ms 内容：而在万有引力定律中出现的质量，我们称之为引力质量。
开始时间：138610ms 结束时间：142220ms 内容：牛顿第二定律还有一种表述形式，它就是
开始时间：142220ms 结束时间：145210ms 内容：物体的动量对时间的变化率
开始时间：145330ms 结束时间：148240ms 内容：与所受到的外力成正比，
开始时间：148310ms 结束时间：151150ms 内容：并且发生在外力的方向上。
开始时间：151600ms 结束时间：153110ms 内容：数学表达式
开始时间：153110ms 结束时间：155810ms 内容：是f等于dpdt
开始时间：155810ms 结束时间：157090ms 内容：其中p
开始时间：157090ms 结束时间：158780ms 内容：是物体的动量，
开始时间：158980ms 结束时间：161900ms 内容：f是物体所受到的合力，
开始时间：162490ms 结束时间：163280ms 内容：啊
开始时间：164230ms 结束时间：165540ms 内容：牛顿第一定律
开始时间：165540ms 结束时间：166930ms 内容：和第二定律
开始时间：166930ms 结束时间：168760ms 内容：都只涉及一个物体。
开始时间：168810ms 结束时间：171460ms 内容：接下来我们来看牛顿第三定律，
开始时间：171910ms 结束时间：173720ms 内容：在牛顿第三定律中，
开始时间：173720ms 结束时间：177990ms 内容：我们知道物体之间的相互作用应该具有什么样的性质？
开始时间：178500ms 结束时间：181600ms 内容：假设有两个物体，m一和m二，
开始时间：181910ms 结束时间：186990ms 内容：物体一受到的二对它的作用力，我们记作f12
开始时间：187930ms 结束时间：188900ms 内容：同向，
开始时间：188900ms 结束时间：193550ms 内容：物体二受到了一对它的作用力，我们记作f21。
开始时间：193850ms 结束时间：196870ms 内容：牛顿第三定律告诉我们，f12
开始时间：196940ms 结束时间：199970ms 内容：和f21它是成对出现的，
开始时间：199970ms 结束时间：203740ms 内容：两者大小相等，方向相反，
开始时间：203960ms 结束时间：205930ms 内容：作用在一条直线上，
开始时间：206250ms 结束时间：212080ms 内容：那因此这一对力呢也被通常的称为作用力与反作用力。
开始时间：213540ms 结束时间：214970ms 内容：牛顿三定律
开始时间：214970ms 结束时间：220890ms 内容：它是有适用条件的，适用条件是牛顿运动定律只适用于
开始时间：220890ms 结束时间：222320ms 内容：惯性参照系。
开始时间：222970ms 结束时间：227210ms 内容：那这样我们对牛顿运动定律做了一个简短的回顾。
开始时间：228460ms 结束时间：234240ms 内容：接下来我们来看令牛顿运动定律解决具体问题的步骤，
开始时间：234240ms 结束时间：237840ms 内容：这个步骤呢对于初学者是非常有帮助的。
开始时间：237840ms 结束时间：238880ms 内容：我们来看一下，
开始时间：238880ms 结束时间：242650ms 内容：它的解题步骤是首先你要选择研究对象，
开始时间：243250ms 结束时间：244480ms 内容：隔离物体
开始时间：244650ms 结束时间：252490ms 内容：之后呢对这个物体进行受力分析，看看它都受到什么样的力，并且把这些力呢用图
开始时间：252490ms 结束时间：254420ms 内容：清晰的表达出来。
开始时间：255190ms 结束时间：262220ms 内容：接下来你要分析一下这个物体的运动，举例说它的速度，它的加速度是什么方向的？
开始时间：262530ms 结束时间：268740ms 内容：它受到什么样的约束等等，它的运动具有什么样的性质，它的轨道是什么样的？
开始时间：268740ms 结束时间：273680ms 内容：总而言之，呢你就对于他的运动的一些信息呢进行分析。
开始时间：274870ms 结束时间：276340ms 内容：接下来第4步，
开始时间：276340ms 结束时间：278480ms 内容：你就要选择一个坐标系，
开始时间：278480ms 结束时间：281060ms 内容：列方程求解未知量。
开始时间：281410ms 结束时间：282350ms 内容：最后
开始时间：282350ms 结束时间：283140ms 内容：我们
开始时间：283140ms 结束时间：286940ms 内容：要对所得的结果进行检验和讨论，
开始时间：286940ms 结束时间：293940ms 内容：这就是我们解题的步骤，对于初学者大家不妨按照这样的一个步骤来试一试，
开始时间：293940ms 结束时间：296290ms 内容：看看对你是否有所帮助。
开始时间：296980ms 结束时间：300190ms 内容：接下来我们就来看具体的题目。
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{
小结
能够使用讯飞语音转写功能，将音频文件转化为文本，并能够通过Re库进行解析，方便进行后续的NLP操作，但仍有一些小错误，需要人工手动修改。