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resolveRedirect()

跟随 URL 的重定向（通常是远程视频或音频），直到最终的 URL 被解析并返回。

如果资源不支持 CORS，该函数将抛出异常。如果资源重定向，并且不支持 CORS，您无法预加载该资产。

tsx
import { resolveRedirect } from "@remotion/preload";
 
resolveRedirect(
  "https://player.vimeo.com/external/291648067.hd.mp4?s=94998971682c6a3267e4cbd19d16a7b6c720f345&profile_id=175&oauth2_token_id=57447761"
)
  .then((src) => {
    console.log(src); // "https://vod-progressive.akamaized.net/..."
  })
  .catch((err) => {
    console.log("Could not resolve redirect", err);
  });
tsx
import { resolveRedirect } from "@remotion/preload";
 
resolveRedirect(
  "https://player.vimeo.com/external/291648067.hd.mp4?s=94998971682c6a3267e4cbd19d16a7b6c720f345&profile_id=175&oauth2_token_id=57447761"
)
  .then((src) => {
    console.log(src); // "https://vod-progressive.akamaized.net/..."
  })
  .catch((err) => {
    console.log("Could not resolve redirect", err);
  });

示例：解析并预加载视频​

此代码片段尝试尽最大努力预加载视频。如果无法解析重定向，它将尝试预加载原始 URL。

tsx
import { preloadVideo, resolveRedirect } from "@remotion/preload";
import { Video } from "remotion";
 
// This code gets executed immediately once the page loads
let urlToLoad =
  "https://player.vimeo.com/external/291648067.hd.mp4?s=94998971682c6a3267e4cbd19d16a7b6c720f345&profile_id=175&oauth2_token_id=57447761";
 
resolveRedirect(urlToLoad)
  .then((resolved) => {
    // Was able to resolve a redirect, setting this as the video to load
    urlToLoad = resolved;
  })
  .catch((err) => {
    // Was unable to resolve redirect e.g. due to no CORS support
    console.log("Could not resolve redirect", err);
  })
  .finally(() => {
    // In either case, we try to preload the original or resolved URL
    preloadVideo(urlToLoad);
  });
 
// This code only executes once the component gets mounted
const MyComp: React.FC = () => {
  // If the component did not mount immediately, this will be the resolved URL.
 
  // If the component mounted immediately, this will be the original URL.
  // In that case preloading is ineffective anyway.
  return <Video src={urlToLoad}></Video>;
};
tsx
import { preloadVideo, resolveRedirect } from "@remotion/preload";
import { Video } from "remotion";
 
// This code gets executed immediately once the page loads
let urlToLoad =
  "https://player.vimeo.com/external/291648067.hd.mp4?s=94998971682c6a3267e4cbd19d16a7b6c720f345&profile_id=175&oauth2_token_id=57447761";
 
resolveRedirect(urlToLoad)
  .then((resolved) => {
    // Was able to resolve a redirect, setting this as the video to load
    urlToLoad = resolved;
  })
  .catch((err) => {
    // Was unable to resolve redirect e.g. due to no CORS support
    console.log("Could not resolve redirect", err);
  })
  .finally(() => {
    // In either case, we try to preload the original or resolved URL
    preloadVideo(urlToLoad);
  });
 
// This code only executes once the component gets mounted
const MyComp: React.FC = () => {
  // If the component did not mount immediately, this will be the resolved URL.
 
  // If the component mounted immediately, this will be the original URL.
  // In that case preloading is ineffective anyway.
  return <Video src={urlToLoad}></Video>;
};

参见​