youtube - lang参数在Youtube API中不起作用

Question

我的任务是获取带有确定语言的字幕的视频
根据查询参数documentation我使用:

caption = true - subtitles filter
lr = en - original video language
hl = en - the primary language of the movies
lang = de - the language I want to get the subtitles

查询示例:

https://gdata.youtube.com/feeds/api/videos?safeSearch=strict&strict=true&v=2&caption=true&key=XXX&q=football&hl=en&lr=en&lang=de

结果:

<errors xmlns='http://schemas.google.com/g/2005'>
    <error>
        <domain>GData</domain>
        <code>unsupportedQueryParam</code>
        <internalReason>Invalid query parameters:lang</internalReason>
    </error>
</errors>

您能解释一下这个结果的原因吗？

Answer 1

我也迷失在youtube API中，但这是我的理解。

在您提供的链接中，参数lang描述为:

YouTube supports this parameter for requests to retrieve a caption track.

“问题”(对于大多数开发者而言，至少是个问题)，如果您不是上传者，则无法请求视频字幕。
参见 here

Captions for a video can only be created, retrieved, modified and deleted by the owner of that video. To perform these operations for a video, you must submit authenticated API requests for which the video's owner is the logged-in user. Accordingly, API requests for caption operations must contain a properly formatted Authorization header.

这就是为什么我认为您不应该做自己想做的事情。