能否自定义尺寸上传图片至Vimeo？缩略图尺寸异常咨询

Hi there, let's break down your question about customizing Vimeo thumbnail sizes:

First, the short answer: You can't directly customize the fixed dimensions of the thumbnail_medium field returned by Vimeo's v2 API. Vimeo standardizes its thumbnail outputs to a set of predefined sizes—thumbnail_medium is hardcoded to 200x150 in that API endpoint, regardless of the size of the image you upload. The platform automatically resizes and crops uploaded thumbnails to fit its preset size buckets.

But don't worry, there's a workaround to get the 400x400 thumbnail you want:

• Modify the thumbnail URL dynamically
  The thumbnail URLs returned by the API follow a pattern like https://i.vimeocdn.com/video/[video_id]_200x150.jpg. You can manually adjust the 200x150 segment to 400x400, and Vimeo's CDN will generate a resized/cropped version of the thumbnail at that exact size. Just make sure your original uploaded thumbnail has the aspect ratio you want (square, in this case) to avoid unwanted cropping.

• Optimize your original upload
  When uploading a custom thumbnail, use an image that's at least 400x400 (or larger, with a square aspect ratio). This ensures the dynamically resized 400x400 version stays sharp, instead of stretching a smaller source image.

• Consider upgrading to Vimeo API v3
  While even the newer v3 API returns preset thumbnail sizes, it provides access to higher-resolution base images and more metadata about available variants. The dynamic URL resizing trick still works seamlessly here, giving you more flexibility to get the exact size you need.

内容的提问来源于stack exchange，提问作者manymanymore