如何从 Azure 媒体服务 DRM 获取许可证 URL

Question

I am using Azure Media Services v3 to create a VoD player application, and I am using the built-in DRM support (Widevine, PlayReady, FairPlay) to encrypt the data. My solution uses Video.js player on the client side with the videojs-contrib-eme package to play the content.

My problem is that for the DRM configuration I have to provide a license URL for the player, but I have not found any API to get the license URL.

The only solution I found is getting the url from the DASH manifest, and then replace parts of the URL with the correct DRM typename, like described here: Github repo in section 9 of the setup-vod.ps1 description. It seems like a sketchy workaround and I am courious if there is any documentation or API to do this correctly. Does anyone have any tutorial, example, or docs for a correct solution or I am already using the best one with the linked solution?

Answer 1

For production systems, customers usually have a CMS storing LA_URLs and players can rely on CMS for these info.

For cases without such CMS, you have to parse DASH MPD for PlayReady and Widevine LA_URLs and HLS playlist for FairPlay LA_URL.

This test player does exactly this (dropdown to DRM at the bottom of the diagnostic overlay): https://openidconnectweb.azurewebsites.net/AMTestPlayer?url=https://eventgridmediaservice-usw22.streaming.media.azure.net/2fa069bd-2b0c-4674-bff7-26ebd6cdc224/MicrosoftElite01.ism/manifest(format=mpd-time-csf,encryption=cenc)