XDU_chaoxing_vedio_download

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一切为了下载垃圾学校放在垃圾超星上的垃圾录播

准备工作

  1. 咱先到超星录播f12抓个包, 在network那里搜一下m3u8

    image-20220413110736942

    • 下面两个 playback.m3u8 就是视频中的一大一小两个视频
    • 重点在箭头指向的那个

  2. 这是个get传参, 将payload复制出来

    image-20220413110900303

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    {
        "type":"2",
    	"videoPath":
        {
             "pptVideo":"...",
             "mobile":"...",
             "teacherTrack":"...",
             "studentFull":"..."
    	}
    }
    • pptVideo: ppt视图(我们所看到的小的那个视频)
    • mobile: 这个很神奇,会在teacherTrack和pptVideo之间来回跳转, 害挺智能的(我决定以后都下这个了)
    • teacherTrack: 跟踪老师视图(就是我们所看到的大的视频)
    • studentFull: 对准学生的监控录像XD

  3. 将复制出来的东西放到 vedio.json 里

    image-20220414142405437

下载

目录结构如下:

image-20220414142428275

下面是 vedio_download.py 的代码, 根据需要修改 var下的变量

  • saveName: 保存的文件名
  • vedioType: json信息中的4中类型,默认mobile
  • threadNumber: 线程数
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import requests,json,time,threading,os

# TODO: var
saveName = "test"
vedioType = "mobile"
threadNumber = 20

# func
def getUrlFromJson(vedioType):
    f = open('vedio.json','r')
    return json.load(f).get("videoPath").get(vedioType)

def parseURL(url):
    tmpUrl = url[:url.rfind('/')+1]
    lst_all = requests.get(url).text.split('\n')
    matchList = [i.strip('\r') for i in lst_all if i.find('.ts')!=-1]
    lst = [tmpUrl+i+'\n' for i in matchList]
    f = open('payload.m3u8','w')
    f.writelines(lst)

def downloadTF(urls):
    for i in range(len(urls)):
        start = time.time()
        ts_url = urls[i]
        ts_name = ts_url.split('/')[-1].split('_')[0]
        try:
            r = requests.get(ts_url,stream=True)
        except Exception as e:
            print('error:{}'.format(e.args))
            continue
        
        ts_path = "temp/{:0>4}.ts".format(ts_name)
        with open(ts_path,"wb+") as f:
            for chunk in r.iter_content(chunk_size=1024):
                if chunk:
                    f.write(chunk)
        end = time.time()
        print('{}_{}_time cost: {}'.format(threading.current_thread().name,ts_path,end-start))

def createThread(threadNumber,urls):
    cnt = len(urls)//threadNumber
    threads = []
    for i in range(threadNumber):
        tmp_urls = urls[i*cnt:i*cnt+cnt]
        t = threading.Thread(target=downloadTF,args=[tmp_urls,],name=str(i))
        t.start()
        threads.append(t)
    for t in threads:
        t.join()

# main
url_m3u8 = getUrlFromJson(vedioType)
parseURL(url_m3u8)
cwd = os.getcwd()
os.makedirs(os.path.join(cwd,'temp'),exist_ok=True)
with open('payload.m3u8','r') as f:
        urls = f.readlines()

createThread(threadNumber,urls)

print('download finished ...')
print('start to merge all the file ...')

cmd = r"copy /b .\temp\*.ts .\{}.ts".format(saveName)
os.system(cmd)

# clear
cmd = 'rmdir /s/q temp'
os.system(cmd)
cmd = 'del /q payload.m3u8'
os.system(cmd)
look at here !!
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