[我用Java编写了一个程序,用于下载YouTube视频的隐藏式字幕:
YouTube.Captions.List request = youtube.captions()
.list("snippet", videoId).setKey(apiKey);
CaptionListResponse response = request.execute();
List<Caption> captions = response.getItems();
for (Caption caption : captions) {
CaptionSnippet snippet = caption.getSnippet();
System.out.println("ID: " + caption.getId());
System.out.println("Name: " + snippet.getName());
System.out.println("Language: " + snippet.getLanguage());
String captionID = caption.getId();
OutputStream output = new FileOutputStream("captions"+captionID);
YouTube.Captions.Download req = youtube.captions()
.download(captionID).setKey(apiKey);
req.getMediaHttpDownloader();
req.executeMediaAndDownloadTo(output);
}
但是req.executeMediaAndDownloadTo(output);调用将引发以下异常:
There was an IO error: null : 401 Unauthorized
Login Required
我做错什么了吗?为什么要授权下载隐藏式字幕?特别要考虑到可以通过Youtube本身免费获得隐藏式字幕的事实:
- "..." below the youtube player
- Open transcript
根据the docs,访问Caption.list
端点需要满足以下条件:
授权
此请求需要具有以下至少一个范围(read more about authentication and authorization)的授权。
范围
https://www.googleapis.com/auth/youtube.force-sslhttps://www.googleapis.com/auth/youtubepartner