MATLAB技巧：一键下载B站高清视频（下篇）

function options = setWebOptions(cookie)
 randNum = randperm(23);
 randNum(randNum>=10);
 options = weboptions('Timeout', randNum(1));
 options.UserAgent = ...
     'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/89.0.4389.82 Safari/537.36';
 options.RequestMethod = 'get';
 options.HeaderFields = {'Cookie', cookie; 'Origin', 'https://www.bilibili.com'; ...
     'accept', 'application/json'; ...
     'accept-encoding', 'gzip, deflate, br'; ...
     'accept-language', 'en-US,en;q=0.8'; ...
     'content-type', 'application/json'; ...
     'Referer', 'https://www.bilibili.com'};
 end  % end functions

function mainInfo = bilibiliVideoInfo(mid, numberOfPage)
 %bilibiliVideoInfo  return some main data fou user from bilibili.com
 %  Inputs:
 %        mid string (mid = '517327498';)
 %        numberOfPage int (numberOfPage = 1|2|3|, ..., |n-1|n);
 %  Outputs:
 %        mainInfo struct (mainInfo.title|mainInfo.facePic|mainInfo.bvid)
 %  Usage:
 %        >>mainInfo = bilibiliVideoInfo('517327498', 5);
 %          mainInfo =
 %          title: {143×1 cell}
 %          facePic: {143×1 cell}
 %          bvid: {143×1 cell}
 %
 % -------------------------------------------
 %  Set request options
 % -------------------------------------------
 randNum = randperm(23);
 randNum(randNum>=10);
 options = weboptions('Timeout', randNum(1));
 options.UserAgent = ...
     'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/89.0.4389.82 Safari/537.36';
 options.RequestMethod = 'get';

 % -------------------------------------------
 %  Set crawl mainly data
 % -------------------------------------------
 mainInfo.title = [];
 mainInfo.facePic = [];
 mainInfo.bvid = [];

 for page = 1 : numberOfPage
     disp(['  | Climbing to the ', num2str(page), 'th page']);
     pause(0.2)
     % API
     dataUrl = ['https://api.bilibili.com/x/space/arc/search?', 'mid=', mid, '&ps=30&tid=0&pn=', num2str(page)];
     res = webread(dataUrl, options);
     allInfo = res.data.list.vlist;
     mainInfo.title = [mainInfo.title; {allInfo.title}'];
     mainInfo.facePic = [mainInfo.facePic; {allInfo.pic}'];
     mainInfo.bvid = [mainInfo.bvid; {allInfo.bvid}'];
 end  % end for

 % mainInfo.facePic = regexprep(mainInfo.facePic, '//(.+?)', 'http://$1');
 disp('  ')
 end  % end function

function getSinglePageVideo(mid, numberOfPage, numberOfVideoStart, saveDir, cookie)
 %getSingleVideo   Get a single page video
 %   Inputs:
 %        mid string (mid = '517327498';)
 %        numberOfPage int (numberOfPage = 1|2|3|, ..., |n-1|n);
 %        numberOfVideoStart int ---Video starting number
 %        saveDir string
 %        cookie string
 %   Outputs:
 %        none
 %
 %% Set request options
 options = setWebOptions(cookie);

 %% Set parameters
 apiUrl = 'https://api.bilibili.com/x/player/playurl?';

 %%
 if ~exist(saveDir, 'dir')
     mkdir(saveDir);
 end

 if ~exist([saveDir, '/facepics'], 'dir')
     mkdir([saveDir, '/facepics']);
 end
 %% Get video's url by cid and bvd number
 mainInfo = bilibiliVideoInfo(mid, numberOfPage);
 numberOfBvid = length(mainInfo.bvid);

 %
 pat = '(?:\|)|(?:\\)|(?:\:)|(?:\*)|(?:\?)|(?:")|(?:<)|(?:>)|(?:/)';

 for ii = numberOfVideoStart : numberOfBvid
     bvid = mainInfo.bvid{ii};
     title = regexprep(mainInfo.title{ii}, pat, '_');
     res = webread(['https://api.bilibili.com/x/web-interface/view?bvid=', bvid]);
     % Get cid number
     cid = num2str(res.data.pages.cid);
     res = webread([apiUrl, 'bvid=', bvid, '&cid=', cid, '&qn=80&otype=json']);
     % Get player url
     playUrl = res.data.durl.url;
     % Save face pictures
     disp(['  |-->Saving ', num2str(ii), 'th|', num2str(numberOfBvid), ' picture']);
     faceImg = imread(mainInfo.facePic{ii});
     imwrite(faceImg, [saveDir, '/facepics/', num2str(ii), '_', title, '.png']);
     % Save video
     disp(['  |-->Saving ', num2str(ii), 'th|', num2str(numberOfBvid), ' video']);
     websave([saveDir, '/', num2str(ii), '_', title, '.mp4'], playUrl, options);
     disp('   ------Save finished!----------')
     disp('                                 ')
 end  % end for
 end  % end function

% ------------------------------------------------
 %  Main script for obtain video from bilibili
 % ------------------------------------------------
 clear
 clc
 close all

 isSendMail = true;
 cookie = ' ';  % 需要将cookie粘贴到这里

 % ------------------------------------------------
 %  Obtain single page video
 % ------------------------------------------------
 mid = ' ';
 numberOfPage = [];
 numberOfVideoStart = [];
 saveDir = '保存视频的文件夹名称';
 getSinglePageVideo(mid, numberOfPage, numberOfVideoStart, saveDir, cookie);

 % ------------------------------------------------
 %  Obtain  multi-page video
 % ------------------------------------------------
 bvid = 'BV1Cy4y117vt';
 numberOfVideoStart = 1;
 saveDir = 'shangguigu_zidingyi';
 getMultiPageVideo(bvid, numberOfVideoStart, saveDir, cookie);