How do we get asset_id of video which is uploaded

[RizwanAslam]

On success callback, there is nothing passed to that method instead of the error object. I am confused about how we will get the URL of the uploaded asset which I will use to preview the video.

// subscribe to events upload.on('success', err => { console.log("Wrap it up, we're done here. 👋"); });

[dylanjha]

Hi @RizwanAslam thanks for reaching out. Good question -- let me help clarify. The short answer is that after the upload success fires you will need to do one of two things:

• Make a request from your client to your server and from your server make a request to Mux with the upload_id
• Wait for the Mux Webhook video.upload.asset_created (more details here) -- this will contain the full upload object which will have an asset_id property.

^ Either of those methods is a valid approach.

---

It sounds like you understand this bit -- but to clarify the relationship between Mux Uploads and Mux Assets for anyone else that may come across this:

Mux Upload

• This gets created on the serverside and gives you an "upload URL" by making the request: POST /uploads
• The upload itself has several properties:id, url, status, new_asset_settings, error
• Use the url property with Upchunk to perform the upload -- it sounds like you got this far
• When the upload is complete, either GET /uploads/:id API Reference or listen for the video.upload.asset_created Webhooks
• At this point in time now that the upload is complete, the upload will have an asset_id property.

Mux Asset

• Use the asset_id property from the completed upload to fetch the asset
• GET /assets/:id: API Reference
• The asset itself has a status ("preparing", "ready", "errored"), playback_ids, aspect_ratio, anupload_id`, etc.
• Be ready to handle all 3 statusus in your application. When the upload is complete the asset will start in the "preparing" state and assuming a valid video file as been uploaded then it will transition to "ready". If the file was not a video file, or happens to be invalid for another reason then the asset will be in the "errored" status.

Hopefully that clarifies the relationship between Uploads and Assets. Here's a guide that might be helpful too.

Let us know if you're still stuck and we'd be happy to help!

[RizwanAslam]

Hi @dylanjha, yup I got it now. Thank you very much for your quick response. Cheers