Proxy AWS S3 assets through the AWS SDK

[JonnyBurger]

By not loading the assets through HTTP, we could save S3 bandwidth cost

[JonnyBurger]

Idea:

Allow wrapping an asset in a new API proxyS3()

<Img src={proxyS3(staticFile('bigmovie.mp4'))}>

If we are not rendering or we are not on a S3 Serve URL, this does nothing at all.

Otherwise, we replace the URL with a call to /s3-proxy?url=[original] (similar to offthreadVideo:

remotion/packages/core/src/video/offthread-video-source.ts

Line 16 in 65245b5

}/proxy?src=${encodeURIComponent(

)

Then on the server, we implement a handler for the proxy (similar to

remotion/packages/renderer/src/offthread-video-server.ts

Line 100 in 65245b5

if (!req.url.startsWith('/proxy')) {

) which calls the Lambda SDK instead getS3Client()

But we should not implement this in @remotion/renderer, we should do it in @remotion/lambda or make a new package, and then add it through a "injection" into @remotion/renderer.

We also don't want a full plugin system yet, so I would say we add this to the internal options (RenderInternals.prepareServer)