有没有办法获取我从 Facebook 发布的视频的大缩略图?
我正在尝试通过 FQL 或 Graph Api 获取大视频缩略图。
当我请求缩略图时,我会得到
vthumb.ak.fbcdn.net/hvthumb-ak-snc4/hs1270.snc4/158204_144210235636391_144442091_14442094442303137_100556_685_JP
.
: fbcdn.net/hvthumb-ak-snc4/hs1270.snc4/158204_144210235636391_144209442303137_10056_685_b.jpg
当我尝试另一个旧视频时,我得到: 0/15/508029674/
t508029674_402635544674_1192。 vthumb.ak.fbcdn.net/vthumb-ak-sf2p/v33376/20/15/508029674/b508029674_402635544674_1192.jpg
t 的位置不同,但如果我将其切换到 ab,我得到:
我
的问题是切换最后一个有没有可靠的方法来获取大型 FB 视频缩略图?这当然没有在我发现的任何地方记录下来。有没有其他方法可以可靠地从 FB 获取此链接?
谢谢,
抱歉没有发布图像或链接,我没有足够的声誉点。
I'm trying to get large video thumbnails via FQL or the Graph Api.
When I request a thumbnail I get:
vthumb.ak.fbcdn.net/hvthumb-ak-snc4/hs1270.snc4/158204_144210235636391_144209442303137_10056_685_t.jpg
I randomly noticed today though that if you change the last t to a b you get:
vthumb.ak.fbcdn.net/hvthumb-ak-snc4/hs1270.snc4/158204_144210235636391_144209442303137_10056_685_b.jpg
When I tried another older video I got:
vthumb.ak.fbcdn.net/vthumb-ak-sf2p/v33376/20/15/508029674/t508029674_402635544674_1192.jpg
The position of the t is different but if I switch it out to a b I get:
vthumb.ak.fbcdn.net/vthumb-ak-sf2p/v33376/20/15/508029674/b508029674_402635544674_1192.jpg
My question is switching the last t to b a reliable way to get large FB video thumbnails? This certainly isn't documented anywhere that I found. Is there any other way to get this link from FB reliably?
Thanks,
p.s. sorry for not posting images or links, i dont have enough reputation points.
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它们有许多未记录的功能。现在它有效,到目前为止一切都很好。设置一个错误标志,当时间到了并且 Facebook 没有响应你的被黑查询时,你可以找到一种新的方法。我不会为长时间的问题而烦恼。 Facebook 文档很乱,请充分利用它。顺便说一句,请确保错误消息能够引起您的注意并引起注意。不要忘记添加一些代码以优雅地降级。当查询未返回图片时,向潜在用户显示另一个占位符图片。
they have many undocumented features. For now it works, so far so good. Set an error flag, and when the time comes and facebook does not respond to your hacked query, you can find a new way. I would not bother for long time issues. Facebook documentation is a mess, make the best out of it. btw, make sure that the error message gets you and makes itself noticed. do not forget to add some code to degrade gracefully. show the potential users another placeholder picture when the query returns no picture.