xcode 如何从 Youtube URL 获取缩略图？
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How can I get the Thumbnail from Youtube URL?
提问by Jaspreet Singh
NSURL *youTubeURL = [NSURL URLWithString:@"http://www.youtube.com/watch?v=HPwyVw_6vsQ&feature=youtu.be"]; // URL is a string which needs to be placed in @"" and close method call with ].
MPMoviePlayerController *player = [[MPMoviePlayerController alloc] initWithContentURL:youTubeURL];
imageSel = [player thumbnailImageAtTime:1.0 timeOption:MPMovieTimeOptionNearestKeyFrame];
I am using this code for getting thumbnail from the video and this return null value in the imagesel.can anybody help me to solve this problem I am using YouTube URL .when I am using this code for the video that is in the main bundle then it is working fine.
我正在使用此代码从视频中获取缩略图，并在 imagesel 中返回空值。有人可以帮我解决这个问题吗？我正在使用 YouTube URL。当我将此代码用于主包中的视频时它工作正常。
回答by Paresh Navadiya
回答by Jaspreet Singh
each youtube link has 4 thumbnail
每个 youtube 链接都有 4 个缩略图
http://img.youtube.com/vi/<insert-youtube-video-id-here>/0.jpg
http://img.youtube.com/vi/<insert-youtube-video-id-here>/1.jpg
http://img.youtube.com/vi/<insert-youtube-video-id-here>/2.jpg
http://img.youtube.com/vi/<insert-youtube-video-id-here>/3.jpg
this code is very good for
这段代码非常适合
for example i have this link:
例如我有这个链接：
http://www.youtube.com/watch?v=HPwyVw_6vsQ&feature=youtu.be
and the youtube video id is:
和 youtube 视频 ID 是：
HPwyVw_6vsQ
and generated thumbnail from this link is:
并从此链接生成的缩略图是：
http://img.youtube.com/vi/HPwyVw_6vsQ/1.jpg
this is very easy to use
这很容易使用
回答by Jeff Posnick
If you have a YouTube watch page URL, and you want to get the thumbnail URL, the "correct" way to do that is to use oEmbed:
如果您有 YouTube 观看页面 URL，并且想要获取缩略图 URL，那么“正确”的方法是使用 oEmbed：
http://apiblog.youtube.com/2009/10/oembed-support.html
http://apiblog.youtube.com/2009/10/oembed-support.html
That way you don't have to attempt to parse the video id out of the URL.
这样您就不必尝试从 URL 中解析视频 ID。
But... what you really should be doing is using a iframeembed to display videos in your web page (or UIWebView). The YouTube API Terms of Service covers the supported ways of accessing YouTube content:
但是...您真正应该做的是使用iframe嵌入在您的网页（或UIWebView）中显示视频。YouTube API 服务条款涵盖了访问 YouTube 内容的支持方式：
