如何從Dictionary.com下載MP3文件在Matlab中？

Question

我正在編寫一個腳本，需要下載和播放位於單獨的.xls文件中的音頻文件（基於詞彙表單詞）。我想使用Dictionary.com下載正確的發音音頻，但無法用音頻方式獲取音頻。

例如，對於單詞的URL 「愚昧」，是

http://static.sfdict.com/staticrep/dictaudio/F00/F0058700.mp3

但對於單詞 「好玩」 是

http://static.sfdict.com/staticrep/dictaudio/F04/F0416100.mp3

我如何可以查詢Dictionary.com和下載相關的音頻？有什麼建議麼？

Answer 1

使用Fbla/Fblabla構建查詢有點困難，但可以從dictionary.com獲取所需的鏈接。像這樣的東西似乎工作：

word = 'supercalifragilisticexpialidocious'; % the word that is to be found 

% build the query for dictionary.com by adding the word and read the url 
r = urlread(sprintf('http://dictionary.reference.com/browse/%s',word)); 

% examine the resulting string that contains the html 
try 
    % find the index of a certain matching sentence that indicates the beginning and end of the query 
    matchIdx = strfind(r,'audio/ogg"> <source src="http://static.sfdict.com/staticrep/dictaudio/'); 
    endIdx = strfind(r, '.mp3"></a>'); 

    % some tuning with indexes results in the exact url that needs to be called 
    % hopefully, the matchIdx and endIdx are found only once - if more, there is an error 
    mp3url = r(matchIdx+141:endIdx+3); 

    % if there is no match, the url is empty, which is also undesirable 
    assert(~isempty(mp3url)); 

catch e 
    % catch the above errors (the mp3url cannot be constructed or is empty), and maybe others 
    % (if this becomes a function, some nice pointers of what went wrong should be added) 
    error('Could not find url.'); 
end 

% query for the mp3 and store the result 
file = 'temp.mp3'; 
urlwrite(mp3url,file); 

% read the just stored file and play! 
[x,Fs] = audioread(file); 
soundsc(x,Fs);